<PAGE>

                                                                     Exhibit 4.1

                                                                  EXECUTION COPY

                     MERRILL LYNCH MORTGAGE INVESTORS, INC.,
                                    Depositor

                             WELLS FARGO BANK, N.A.
                  Master Servicer and Securities Administrator

                                       and

                      HSBC BANK USA, NATIONAL ASSOCIATION,
                                     Trustee

                         POOLING AND SERVICING AGREEMENT

                            Dated as of March 1, 2007

                                   ----------

             Mortgage Pass-Through Certificates, MLMBS Series 2007-1

<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            Page
                                                                            ----
<S>                                                                         <C>
ARTICLE I DEFINITIONS....................................................      7
   Section 1.02    Accounting............................................     51
ARTICLE II CONVEYANCE OF MORTGAGE LOANS; ORIGINAL ISSUANCE OF
              CERTIFICATES...............................................     52
   Section 2.01    Conveyance of Mortgage Loans to Trustee...............     52
   Section 2.02    Acceptance of Mortgage Loans by Trustee...............     55
   Section 2.03    Assignment of Interest in the Mortgage Loan Purchase
                   Agreement.............................................     58
   Section 2.04    Substitution of Mortgage Loans........................     59
   Section 2.05    Issuance of Certificates..............................     61
   Section 2.06    Representations and Warranties Concerning the
                   Depositor.............................................     61
   Section 2.07    Representations and Warranties Concerning the Master
                   Servicer and Securities Administrator.................     62

ARTICLE III ADMINISTRATION AND SERVICING OF MORTGAGE LOANS...............     64
   Section 3.01    Master Servicer.......................................     64
   Section 3.02    REMIC-Related Covenants...............................     65
   Section 3.03    Monitoring of Servicers...............................     65
   Section 3.04    Fidelity Bond.........................................     66
   Section 3.05    Power to Act; Procedures..............................     66
   Section 3.06    Due-on-Sale Clauses; Assumption Agreements............     67
   Section 3.07    Release of Mortgage Files.............................     67
   Section 3.08    Documents, Records and Funds in Possession of Master
                   Servicer To Be Held for Trustee.......................     68
   Section 3.09    Standard Hazard Insurance and Flood Insurance
                   Policies..............................................     69
   Section 3.10    Presentment of Claims and Collection of Proceeds......     69
   Section 3.11    Maintenance of the Primary Mortgage Insurance
                   Policies..............................................     70
   Section 3.12    Trustee to Retain Possession of Certain Insurance
                   Policies and Documents................................     70
   Section 3.13    Realization Upon Defaulted Mortgage Loans.............     71
   Section 3.14    Compensation for the Master Servicer..................     71
   Section 3.15    REO Property..........................................     71
   Section 3.16    Annual Statement as to Compliance.....................     72
   Section 3.17    Reports on Assessment of Compliance and Attestation...     73
   Section 3.18    Periodic Filings......................................     75
   Section 3.19    Compliance with Regulation AB.........................     82

ARTICLE IV ACCOUNTS......................................................     83
   Section 4.01    Protected Accounts....................................     83
   Section 4.02    Master Servicer Collection Account....................     84
   Section 4.03    Permitted Withdrawals and Transfers from the Master
                   Servicer Collection Account...........................     85
</TABLE>

<PAGE>

<TABLE>
<S>                                                                         <C>
   Section 4.04    Distribution Account..................................     86
   Section 4.05    Permitted Withdrawals and Transfers from the
                   Distribution Account..................................     86
   Section 4.06    Reserve Account.......................................     88

ARTICLE V CERTIFICATES...................................................     90
   Section 5.01    The Certificates......................................     90
   Section 5.02    Certificate Register; Registration of Transfer and
                   Exchange of Certificates..............................     90
   Section 5.03    Mutilated, Destroyed, Lost or Stolen Certificates.....     94
   Section 5.04    Persons Deemed Owners.................................     95
   Section 5.05    Access to List of Certificateholders' Names and
                   Addresses.............................................     95
   Section 5.06    Book-Entry Certificates...............................     95
   Section 5.07    Notices to Depository.................................     96
   Section 5.08    Definitive Certificates...............................     96
   Section 5.09    Maintenance of Office or Agency.......................     97

ARTICLE VI PAYMENTS TO CERTIFICATEHOLDERS................................     98
   Section 6.01    Distributions on the Certificates.....................     98
   Section 6.02    Allocation of Losses..................................    103
   Section 6.03    Payments..............................................    104
   Section 6.04    Statements to Certificateholders......................    104
   Section 6.05    Monthly Advances......................................    107
   Section 6.06    Compensating Interest Payments........................    107

ARTICLE VII THE MASTER SERVICER AND THE DEPOSITOR........................    108
   Section 7.01    Liabilities of the Master Servicer....................    108
   Section 7.02    Merger or Consolidation of the Master Servicer........    108
   Section 7.03    Indemnification from the Master Servicer and the
                   Depositor.............................................    108
   Section 7.04    Limitations on Liability of the Master Servicer and
                   Others................................................    109
   Section 7.05    Master Servicer Not to Resign.........................    110
   Section 7.06    Successor Master Servicer.............................    110
   Section 7.07    Sale and Assignment of Master Servicing...............    110

ARTICLE VIII DEFAULT.....................................................    112
   Section 8.01    Events of Default.....................................    112
   Section 8.02    Trustee to Act; Appointment of Successor..............    113
   Section 8.03    Notification to Certificateholders....................    114
   Section 8.04    Waiver of Defaults....................................    114
   Section 8.05    List of Certificateholders............................    115

ARTICLE IX CONCERNING THE TRUSTEE AND THE SECURITIES ADMINISTRATOR.......    116
   Section 9.01    Duties of Trustee.....................................    116
   Section 9.02    Certain Matters Affecting the Trustee and the
                   Securities Administrator..............................    118
</TABLE>


                                       iii

<PAGE>

<TABLE>
<S>                                                                         <C>
   Section 9.03    Trustee and Securities Administrator Not Liable for
                   Certificates or Mortgage Loans........................    120
   Section 9.04    Trustee and Securities Administrator May Own
                   Certificates..........................................    120
   Section 9.05    Trustee's and Securities Administrator's Fees and
                   Expenses..............................................    120
   Section 9.06    Eligibility Requirements for Trustee and Securities
                   Administrator.........................................    121
   Section 9.07    Insurance.............................................    122
   Section 9.08    Resignation and Removal of the Trustee and Securities
                   Administrator.........................................    122
   Section 9.09    Successor Trustee and Successor Securities
                   Administrator.........................................    123
   Section 9.10    Merger or Consolidation of Trustee or Securities
                   Administrator.........................................    123
   Section 9.11    Appointment of Co-Trustee or Separate Trustee.........    124
   Section 9.12    Federal Information Returns and Reports to
                   Certificateholders; REMIC Administration..............    125

ARTICLE X TERMINATION....................................................    130
   Section 10.01   Termination upon Liquidation or Repurchase of all
                   Mortgage Loans........................................    130
   Section 10.02   Final Distribution on the Certificates................    131
   Section 10.03   Additional Termination Requirements...................    132

ARTICLE XI MISCELLANEOUS PROVISIONS......................................    134
   Section 11.01   Intent of Parties.....................................    134
   Section 11.02   Amendment.............................................    134
   Section 11.03   Recordation of Agreement..............................    136
   Section 11.04   Limitation on Rights of Certificateholders............    136
   Section 11.05   Acts of Certificateholders............................    136
   Section 11.06   Governing Law.........................................    138
   Section 11.07   Notices...............................................    138
   Section 11.08   Severability of Provisions............................    139
   Section 11.09   Successors and Assigns................................    139
   Section 11.10   Article and Section Headings..........................    139
   Section 11.11   Counterparts..........................................    139
   Section 11.12   Notice to Rating Agencies.............................    139
   Section 11.13   Third Party Rights....................................    139

ARTICLE XII REMIC ADMINISTRATION.........................................    140
   Section 12.01   REMIC Administration..................................    140
   Section 12.02   Prohibited Transactions and Activities................    140
   Section 12.03   Indemnification with Respect to Prohibited
                   Transactions or Loss of REMIC Status..................    140
   Section 12.04   REO Property..........................................    141
</TABLE>


                                       iv

<PAGE>

EXHIBITS
Exhibit A-1          -   Form of Class A and Class M Certificates
Exhibit A-2          -   Form of Class B Certificates
Exhibit A-3          -   Form of Class A-R Certificate
Exhibit A-4          -   Form of Class P Certificate
Exhibit B            -   Mortgage Loan Schedule
Exhibit C            -   [Reserved]
Exhibit D            -   Request for Release of Documents
Exhibit E-1          -   Form of Transferee's Letter and Affidavit
Exhibit E-2          -   Form of Transferor Certificate
Exhibit F-1          -   Form of Transferor Representation Letter
Exhibit F-2          -   Form of Investor Representation Letter
Exhibit F-3          -   Form of Rule 144A Letter
Exhibit G            -   Form of Custodial Agreement
Exhibit H            -   [Reserved]
Exhibit I-1 to I-7   -   Assignment Agreements
Exhibit J            -   Mortgage Loan Purchase Agreement
Exhibit K            -   Servicing Criteria To Be Addressed in Assessment of
                         Compliance
Exhibit L            -   Form of Sarbanes-Oxley Certification
Exhibit M            -   Form of Back-up Sarbanes-Oxley Certification
Exhibit N            -   [Reserved]
Exhibit O            -   Additional Disclosure Notification
Exhibit P            -   Form of Item 1123 Certification of Servicer
Exhibit Q-1          -   Additional Form 10-D Disclosure
Exhibit Q-2          -   Additional Form 10-K Disclosure
Exhibit Q-3          -   Form 8-K Disclosure Information

SCHEDULE I           -   Prepayment Penalty Mortgage Loans


                                        v

<PAGE>

                         POOLING AND SERVICING AGREEMENT

     This Pooling and Servicing Agreement is dated as of March 1, 2007 (the
"Agreement"), among MERRILL LYNCH MORTGAGE INVESTORS, INC., as depositor (the
"Depositor"), WELLS FARGO BANK, N.A., as master servicer (in such capacity, the
"Master Servicer") and as securities administrator (in such capacity, the
"Securities Administrator") and HSBC BANK USA, NATIONAL ASSOCIATION, as trustee
(the "Trustee").

                              PRELIMINARY STATEMENT

     The Depositor has acquired the Mortgage Loans from the Seller and at the
Closing Date is the owner of the Mortgage Loans and the other property being
conveyed by the Depositor to the Trustee hereunder for inclusion in the Trust
Fund. On the Closing Date, the Depositor will acquire the Certificates from the
Securities Administrator as consideration for the Depositor's transfer to the
Trust Fund of the Mortgage Loans and the other property constituting the Trust
Fund. The Depositor has duly authorized the execution and delivery of this
Agreement to provide for the conveyance to the Trustee of the Mortgage Loans and
the other property constituting the Trust Fund. All covenants and agreements
made by the Seller in the Mortgage Loan Purchase Agreement and in this Agreement
and all covenants and agreements made by the Depositor, the Trustee, the
Securities Administrator and the Master Servicer herein with respect to the
Mortgage Loans and the other property constituting the Trust Fund are for the
benefit of the Holders from time to time of the Certificates. The Depositor, the
Trustee, the Securities Administrator and the Master Servicer are entering into
this Agreement, and the Trustee is accepting the Trust Fund created hereby, for
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged.

     As provided herein, the Securities Administrator shall elect that the Trust
Fund be treated for federal income tax purposes as consisting of (i) two real
estate mortgage investment conduits (each a "REMIC" or, in the alternative,
"REMIC 1" and the "Upper Tier REMIC," respectively) in a tiered structure, (ii)
the right to receive payments distributable to the Class P Certificates and
(iii) the grantor trust described in Section 9.12 hereof . The Certificates,
other than the Class A-R and Class P Certificates, shall represent ownership of
regular interests in the Upper Tier REMIC. The Class A-R Certificate represents
the sole class of residual interest in each of REMIC 1 and the Upper Tier REMIC.

     The Upper Tier REMIC shall hold as its assets the several classes of
uncertificated REMIC 1 Regular Interests. REMIC 1 shall hold as its assets the
property of the Trust Fund other than the REMIC 1 Interests and other than the
right to receive payments distributable to the Class P Certificates.

     Each Upper Tier REMIC Regular Interest is hereby designated as a regular
interest in the Upper Tier REMIC for purposes of the REMIC Provisions. Each
REMIC 1 Regular Interest is hereby designated as a regular interest in REMIC 1
for purposes of the REMIC Provisions.

     The Class LT1-R Interest is hereby designated as the sole class of residual
interest in REMIC 1 for purposes of the REMIC Provisions. The Class A-R
Certificate, other than the portion thereof representing the right to receive
payments in respect of the Class LT1-R Interest,


                                       -1-

<PAGE>

is hereby designated as the sole class of residual interest in the Upper Tier
REMIC for purposes of the REMIC provisions. The Class A-R Certificate will also
represent the Class LT1-R Interest.

THE REMIC 1 INTERESTS

     The following table sets forth (or describes) the class designation,
interest rate, initial principal balance, and related group of Mortgage Loans
for each class of REMIC 1 Interests:

<TABLE>
<CAPTION>
                                        Interest         Related Loan Groups
Class Designation   Principal Balance     Rate              or Loan Group
-----------------   -----------------   --------   ------------------------------
<S>                 <C>                 <C>        <C>
LT11A               $    150,992.7331      (2)     Loan Group I
LT11B               $  3,552,582.7331      (3)     Loan Group I
LT12A               $     41,831.9635      (2)     Loan Group II
LT12B               $    984,221.9635      (4)     Loan Group II
LT1Z                $448,950,840.2668      (2)     Loan Group I and Loan Group II
LT1-R                      (1)             (1)     N/A
</TABLE>

----------
(1)  The Class LT1-R Interest represents the sole class of residual interest in
     REMIC 1 and has neither a principal amount nor an interest rate. The Class
     LT1-R Interest shall be represented by the Class A-R Certificate.

(2)  The Class LT11A Interest, the Class LT12A Interest and the Class LT1Z
     Interest shall have an interest rate for each Distribution Date (and the
     related Interest Accrual Period) equal to the Net WAC.

(3)  The Class LT11B Interest shall have an interest rate for any Distribution
     Date (and the related Interest Accrual Period) equal to the Loan Group I
     Net WAC.

(4)  The Class LT12B Interest shall have an interest rate for any Distribution
     Date (and the related Interest Accrual Period) equal to the Loan Group II
     Net WAC.

     On each Distribution Date, the Securities Administrator shall first pay or
charge as an expense of REMIC 1 all expenses of the Issuing Entity for such
Distribution Date.

     Principal distributions shall be deemed to be made on the REMIC 1 Interests
first, so as to keep the uncertificated principal balance of each REMIC 1
Interest ending with the designation "A" equal to 1% of the excess of (x) the
aggregate Stated Principal Balance of the Mortgage Loans in the related Loan
Group over (y) the aggregate class principal amounts of the Certificates in the
Certificate Group related to such Loan Group (except that if 1% of any such
excess is greater than the principal amount of the corresponding REMIC 1
Interest ending with the designation "A", the least amount of principal shall be
distributed to such REMIC 1 Interests such that the REMIC 1 Subordinate Balance
Ratio is maintained); second, to each REMIC 1 Interest ending with the
designation "B" so as to keep the uncertificated principal balance of each such
REMIC 1 Interest equal to 1% of the aggregate Stated Principal Balance of the
Mortgage Loans in the related Loan Group and finally, all remaining principal
amounts shall be distributed in respect of the Class LT1Z Interest. Realized
Losses with respect to principal shall be allocated among the REMIC 1 Interests
first, so as to keep the uncertificated principal balance of each REMIC 1
Interest ending with the designation "A" equal to 1% of the excess of (x) the
aggregate Stated Principal Balance of the Mortgage Loans in the related Loan
Group over (y) the


                                       -2-

<PAGE>

aggregate class principal amounts of the Certificates in the Certificate Group
related to such Loan Group (except that if 1% of any such excess is greater than
the principal amount of the corresponding REMIC 1 Interest ending with the
designation "A", the least amount of losses shall be allocated to such REMIC 1
Interests such that the REMIC 1 Subordinate Balance Ratio is maintained);
second, to each REMIC 1 Interest ending with the designation "B" so as to keep
the uncertificated principal balance of each such REMIC 1 Interest equal to 1%
of the aggregate Principal Balance of the Mortgage Loans in the related Loan
Group and finally, all remaining Realized Losses with respect to principal shall
be distributed in respect of the Class LT1Z Interest.

     If on any Distribution Date the Class Certificate Balance of any Class of
Certificates is increased due to Subsequent Recoveries pursuant to the
definition of "Class Certificate Balance", then there shall be an equivalent
aggregate increase in the principal amounts of the REMIC 1 Regular Interests,
with such increase allocated (before the making of distributions and the
allocation of losses on the REMIC 1 Regular Interests on such Distribution Date)
among the REMIC 1 Regular Interests as follows: (i) first, to each REMIC 1
Interest ending with the designation "B" so as to keep the uncertificated
principal balance of each such REMIC 1 Interest equal to 1% of the aggregate
Stated Principal Balance of the Mortgage Loans in the related Loan Group, (ii)
second, to each REMIC 1 Regular Interest ending with the designation "A", so
that the uncertificated principal balance of each REMIC 1 Regular Interest
ending with the designation "A" is as close as possible to (but does not exceed)
1% of the excess of (x) the aggregate Stated Principal Balance of the Mortgage
Loans in related Loan Group over (y) the aggregate class principal balance of
the Certificates in the Certificate Group related to such Loan Group; provided,
however, that (a) the REMIC 1 Subordinate Balance Ratio is maintained and (b)
amounts allocated to any REMIC 1 Regular Interest pursuant to this clause (ii)
shall not exceed the amount of any previous realized losses allocated to such
REMIC 1 Regular Interest not previously offset by distributions or increases in
the principal amount of such REMIC 1 Regular Interest and (iii) finally, all
remaining amounts to the Class LT1Z Interest.

     All computations with respect to the REMIC 1 Interests shall be computed to
eight decimal places.

THE CERTIFICATES

     The following table sets forth (or describes) the Class designation,
Pass-Through Rate, initial Class Certificate Balance or initial notional amount,
and minimum denomination for each Class of Certificates comprising interests in
the Trust Fund created hereunder.

<TABLE>
<CAPTION>
               Related Class
                 or Classes
                of interests                     Initial          Minimum
                   in the                         Class        Denominations
    Class        Upper Tier    Pass-Through    Certificate     or Percentage
 Designation       REMIC           Rate          Balance          Interest
------------   -------------   ------------   ------------     -------------
<S>            <C>             <C>            <C>              <C>
Class I-A-1     Class I-A-1         (1)       $325,701,900      $25,000.00
Class I-A-2     Class I-A-2         (1)       $ 14,457,000      $25,000.00
Class II-A-1    Class II-A-1        (2)       $ 90,234,000      $25,000.00
Class II-A-2    Class II-A-2        (2)       $  4,005,000      $25,000.00
Class A-R       Class A-R           (3)       $        100             100%
</TABLE>


                                       -3-

<PAGE>

<TABLE>
<CAPTION>
               Related Class
                 or Classes
                of interests                     Initial          Minimum
                   in the                         Class        Denominations
    Class        Upper Tier    Pass-Through    Certificate     or Percentage
 Designation       REMIC           Rate          Balance          Interest
------------   -------------   ------------   ------------     -------------
<S>            <C>             <C>            <C>              <C>
  Class M-1      Class M-1          (4)       $  9,074,000      $25,000.00
  Class M-2      Class M-2          (4)       $  3,402,000      $25,000.00
  Class M-3      Class M-3          (4)       $  2,495,000      $25,000.00
  Class B-1      Class B-1          (4)       $  1,814,000      $25,000.00
  Class B-2      Class B-2          (4)       $  1,134,000      $25,000.00
  Class B-3      Class B-3          (4)       $  1,363,469      $25,000.00
  Class P        Class P           N/A(5)              N/A(5)          100%
</TABLE>

(1)  The Pass-Through Rate with respect to any Distribution Date (and the
     related Interest Accrual Period) for the Class I-A-1 and Class I-A-2
     Certificates will be the Loan Group I Net WAC.

(2)  The Pass-Through Rate with respect to any Distribution Date (and the
     related Interest Accrual Period) for the Class II-A-1 and Class II-A-2
     Certificates will be the Loan Group II Net WAC.

(3)  The Pass-Through Rate with respect to any Distribution Date (and the
     related Interest Accrual Period) for the Class A-R Certificates will be the
     Loan Group I Net WAC.

(4)  The Pass-Through Rates with respect to any Distribution Date (and the
     related Interest Accrual Period) for the Class M-1, Class M-2, Class M-3,
     Class B-1, Class B-2 and Class B-3 Certificates will be equal to the
     Subordinate Net WAC.

(5)  The Class P Certificates shall not have minimum dollar denominations or
     Class Certificate Balance and shall be issued in a minimum percentage
     interest of 10% and an aggregate percentage interest of 100%. The Class P
     Certificates will be entitled to receive Prepayment Penalties on the
     Prepayment Penalty Mortgage Loans.

     As of the Cut-off Date, the Mortgage Loans had an aggregate Stated
Principal Balance of $453,680,469.66.

     In consideration of the mutual agreements herein contained, the Depositor,
the Trustee, Securities Administrator and the Master Servicer hereby agree as
follows:


                                       -4-
<PAGE>

                                    ARTICLE I
                                   DEFINITIONS

     Whenever used in this Agreement, the following words and phrases, unless
otherwise expressly provided or unless the context otherwise requires, shall
have the meanings specified in this Article.

     ABN AMRO: ABN AMRO Mortgage Group, Inc. or any successor thereto.

     ABN AMRO Assignment Agreement: The Assignment, Assumption and Recognition
Agreement, dated as of March 1, 2007, among the Seller, the Depositor and ABN
AMRO, pursuant to which the ABN AMRO Servicing Agreement (other than the rights
to enforce the representations and warranties with respect to the ABN AMRO
Loans) were assigned to the Depositor for the benefit of the Certificateholders.

     ABN AMRO Loans: The Mortgage Loans serviced by ABN AMRO pursuant to the ABN
AMRO Servicing Agreement.

     ABN AMRO Servicing Agreement: The Master Mortgage Loan Sale and Servicing
Agreement, dated as of October 1, 2006, between ABN AMRO and the Seller.

     Accepted Master Servicing Practices: With respect to any Mortgage Loan, as
applicable, either (x) those customary mortgage master servicing practices of
prudent mortgage servicing institutions that master service mortgage loans of
the same type and quality as such Mortgage Loan in the jurisdiction where the
related Mortgaged Property is located, to the extent applicable to the Trustee
or the Master Servicer (except in its capacity as successor to a Servicer), or
(y) as provided in the applicable Servicing Agreement, to the extent applicable
to any Servicer, but in no event below the standard set forth in clause (x).

     Account: The Master Servicer Collection Account, Distribution Account and
any Protected Account as the context may require.

     Accountant's Attestation: As defined in Section 3.17.

     Accrued Certificate Interest: With respect to each Class of Certificates,
an amount equal to the interest accrued during the related Interest Accrual
Period on the Class Certificate Balance thereof at the then-applicable
Pass-Through Rate. Accrued Certificate Interest on any Class of Certificates
will be reduced by the amount of (i) Prepayment Interest Shortfalls (to the
extent not offset by the related Servicer or Master Servicer with a payment of
Compensating Interest as provided in Section 6.06), (ii) the interest portion of
Realized Losses allocated to such Class of Certificates pursuant to Section 6.02
and (iii) any other interest shortfalls not covered by the subordination
provided by the Class M Certificates and Class B Certificates, including
shortfalls as a result of the Relief Act or similar legislation or regulations,
with all such reductions allocated among all of the Certificates in proportion
to their respective amounts of Accrued Certificate Interest payable on such
Distribution Date which would have resulted absent such reductions.

     Additional Disclosure Notification: As defined in Section 3.18(b).


                                       -5-

<PAGE>

     Additional Form 10-D Disclosure: As defined in Section 3.18(e).

     Additional Form 10-K Disclosure: As defined in Section 3.18(h).

     Adverse REMIC Event: As defined in Section 9.12(g).

     Affiliate: As to any Person, any other Person controlling, controlled by or
under common control with such Person. "Control" means the power to direct the
management and policies of a Person, directly or indirectly, whether through
ownership of voting securities, by contract or otherwise. "Controlled" and
"Controlling" have meanings correlative to the foregoing. The Master Servicer
may conclusively presume that a Person is not an Affiliate of another Person
unless a Responsible Officer of the Master Servicer has actual knowledge to the
contrary.

     Agreement: This Pooling and Servicing Agreement, including the exhibits
hereto, and all amendments hereof and supplements hereto.

     Applicable Credit Rating: For any long-term deposit or security, a credit
rating of AAA in the case of S&P or AAA in the case of Fitch. For any short-term
deposit or security, a rating of A-l+ in the case of S&P or A-1+ in the case of
Fitch.

     Applicable Credit Support Percentage: With respect to any Class of
Subordinate Certificates, the sum of the related Class Subordination Percentages
of such Class and all Classes of Subordinate Certificates which have a lower
relative priority of payment than such Class.

     Appraised Value: For any Mortgaged Property related to a Mortgage Loan, the
amount set forth as the appraised value of such Mortgaged Property in an
appraisal made for the mortgage originator in connection with its origination of
the related Mortgage Loan.

     Assessment of Compliance: As defined in Section 3.17.

     Assignment: An assignment of the Mortgage, notice of transfer or equivalent
instrument, in recordable form, sufficient under the laws of the jurisdiction
wherein the related Mortgaged Property is located to reflect of record the sale
of the Mortgage Loan to the Trustee for the benefit of Certificateholders, which
assignment, notice of transfer or equivalent instrument may be in the form of
one or more blanket assignments covering Mortgages secured by Mortgaged
Properties located in the same county, if permitted by law and accompanied by an
Opinion of Counsel to that effect.

     Assignment Agreements: The IndyMac Assignment Agreement, the PHH Assignment
Agreement, the Wells Fargo Assignment Agreement, the ABN AMRO Assignment
Agreement, the Washington Mutual Assignment Agreement, the Countrywide
Assignment Agreement and the National City Assignment Agreement, which are
attached hereto as Exhibits I-1, I-2, I-3, I-4, I-5, I-6 and I-7, respectively.

     Assumed Final Distribution Date: For all Classes of Certificates, April 25,
2037, or if such day is not a Business Day, the next succeeding Business Day.


                                       -6-

<PAGE>

     Auction: The one-time auction conducted by the Securities Administrator, as
described in Section 10.01(b) hereof.

     Auction date: The date on which the Auction occurs.

     Available Funds: For any Distribution Date, the sum of the Group I
Available Funds and the Group II Available Funds.

     Average Loss Severity: With respect to any period and each Loan Group, the
fraction obtained by dividing (x) the aggregate amount of Realized Losses for
the related Mortgage Loans for such period by (y) the number of related Mortgage
Loans which had Realized Losses for such period.

     Back-Up Certification: As defined in Section 3.18(k).

     Bankruptcy Code: The United States Bankruptcy Code, as amended as codified
in 11 U.S.C. Sections 101-1330.

     Book-Entry Certificates: Any of the Certificates that shall be registered
in the name of the Depository or its nominee, the ownership of which is
reflected on the books of the Depository or on the books of a Person maintaining
an account with the Depository (directly, as a "Depository Participant", or
indirectly, as an indirect participant in accordance with the rules of the
Depository and as described in Section 5.02 hereof). On the Closing Date, the
Certificates (other than the Class A-R Certificate and the Private Certificates)
shall be Book-Entry Certificates.

     Business Day: Any day other than (i) a Saturday or a Sunday, or (ii) a day
on which the New York Stock Exchange or Federal Reserve is closed or on which
banking institutions in the jurisdiction in which the Trustee, the Master
Servicer, any Servicer or the Securities Administrator are authorized or
obligated by law or executive order to be closed.

     Certificate: Any mortgage pass-through certificate evidencing a beneficial
ownership interest in the Trust Fund signed and countersigned by the Securities
Administrator.

     Certificate Group: Each of the Group I Certificates and the Group II
Certificates.

     Certificateholder or Holder: The Person in whose name a Regular Certificate
is registered in the Certificate Register, except that a Disqualified
Organization or non-U.S. Person shall not be a Holder of the Class A-R
Certificate for any purpose hereof.

     Certificate Owner: With respect to each Book-Entry Certificate, any
beneficial owner thereof.

     Certificate Register: The register maintained pursuant to Section 5.02
hereof.

     Certification Parties: As defined in Section 3.18(k).

     Certifying Person: As defined in Section 3.18(k).


                                       -7-

<PAGE>

     Class: Collectively, Certificates which have the same priority of payment
and bear the same class designation and the form of which is identical except
for variation in the Percentage Interest evidenced thereby.

     Class A Certificate: Any of the Class I-A-1, Class I-A-2, Class II-A-1,
Class II-A-2 or Class A-R Certificates as designated on the face thereof
substantially in the form annexed (other than the Class A-R Certificate) hereto
as Exhibit A-1, executed by the Securities Administrator and authenticated and
delivered by the Securities Administrator, representing the right to
distributions as set forth herein and therein.

     Class A-R Certificate: The Class A-R Certificate executed, authenticated
and delivered by the Securities Administrator substantially in the form annexed
hereto as Exhibit A-3 and evidencing the ownership of the Class LT1-R Interest
and the residual interest in the Upper Tier REMIC.

     Class A Certificateholder: Any Holder of a Class A Certificate.

     Class B Certificate: Any one of the Class B-1, Class B-2 or Class B-3
Certificates as designated on the face thereof substantially in the form annexed
hereto as Exhibit A-2, executed by the Securities Administrator and
authenticated and delivered by the Securities Administrator, representing the
right to distributions as set forth herein and therein.

     Class B Certificateholder: Any Holder of a Class B Certificate.

     Class B Percentage: The Class B-1 Percentage, Class B-2 Percentage or Class
B-3 Percentage.

     Class B-1 Percentage: With respect to any Distribution Date, the lesser of
100% and a fraction, expressed as a percentage, the numerator of which is the
aggregate Class Certificate Balance of the Class B-1 Certificates immediately
prior to such Distribution Date and the denominator of which is the aggregate
Stated Principal Balance of all of the Mortgage Loans (or related REO
Properties) immediately prior to such Distribution Date.

     Class B-2 Percentage: With respect to any Distribution Date, the lesser of
100% and a fraction, expressed as a percentage, the numerator of which is the
aggregate Class Certificate Balance of the Class B-2 Certificates immediately
prior to such Distribution Date and the denominator of which is the aggregate
Stated Principal Balance of all of the Mortgage Loans (or related REO
Properties) immediately prior to such Distribution Date.

     Class B-3 Percentage: With respect to any Distribution Date, the lesser of
100% and a fraction, expressed as a percentage, the numerator of which is the
aggregate Class Certificate Balance of the Class B-3 Certificates immediately
prior to such Distribution Date and the denominator of which is the aggregate
Stated Principal Balance of all of the Mortgage Loans (or related REO
Properties) immediately prior to such Distribution Date.

     Class Certificate Balance: With respect to any Certificate as of any date
of determination, the Class Certificate Balance of such Certificate on the
Distribution Date immediately prior to such date of determination, plus any
Subsequent Recoveries added to the


                                       -8-

<PAGE>

Class Certificate Balance of such Certificate pursuant to Section 6.01, and
reduced by the aggregate of (a) all distributions of principal made thereon on
such immediately prior Distribution Date and (b) without duplication of amounts
described in clause (a) above, reductions in the Class Certificate Balance
thereof in connection with allocations thereto of Realized Losses on the
Mortgage Loans and Extraordinary Trust Fund Expenses on such immediately prior
Distribution Date (or, in the case of any date of determination up to and
including the initial Distribution Date, the initial Class Certificate Balance
of such Certificate, as stated on the face thereof); provided, however, that the
Class Certificate Balance of each Subordinate Certificate of the Class of
Subordinate Certificates outstanding with the highest numerical designation at
any given time shall be calculated to equal the Percentage Interest evidenced by
such Certificate multiplied by the excess, if any, of (A) the then aggregate
Stated Principal Balance of the Mortgage Loans over (B) the then aggregate Class
Certificate Balance of all other Classes of Certificates then outstanding.

     Class M Certificate: Any one of the Class M-1, Class M-2 or Class M-3
Certificates as designated on the face thereof substantially in the form annexed
hereto as Exhibit A-1, executed by the Securities Administrator and
authenticated and delivered by the Securities Administrator, representing the
right to distributions as set forth herein and therein.

     Class M Certificateholder: Any Holder of a Class M Certificate.

     Class M Percentage: The Class M-1 Percentage, Class M-2 Percentage or Class
M-3 Percentage.

     Class M-1 Percentage: With respect to any Distribution Date, the lesser of
100% and a fraction, expressed as a percentage, the numerator of which is the
aggregate Class Certificate Balance of the Class M-1 Certificates immediately
prior to such date and the denominator of which is the aggregate Stated
Principal Balance of all of the Mortgage Loans (or related REO Properties)
immediately prior to such Distribution Date.

     Class M-2 Percentage: With respect to any Distribution Date, the lesser of
100% and a fraction, expressed as a percentage, the numerator of which is the
aggregate Class Certificate Balance of the Class M-2 Certificates immediately
prior to such date and the denominator of which is the aggregate Stated
Principal Balance of all of the Mortgage Loans (or related REO Properties)
immediately prior to such Distribution Date.

     Class M-3 Percentage: With respect to any Distribution Date, the lesser of
100% and a fraction, expressed as a percentage, the numerator of which is the
aggregate Class Certificate Balance of the Class M-3 Certificates immediately
prior to such date and the denominator of which is the aggregate Stated
Principal Balance of all of the Mortgage Loans (or related REO Properties)
immediately prior to such Distribution Date.

     Class P Certificate: Any one of the Class P Certificates as designated on
the face thereof substantially in the form annexed hereto as Exhibit A-4,
executed by the Securities Administrator and authenticated and delivered by the
Securities Administrator representing the right to distributions of Prepayment
Penalties received on the Prepayment Penalty Mortgage Loans as set forth herein.


                                       -9-

<PAGE>

     Class Subordination Percentage: With respect to any Distribution Date and
each Class of Subordinate Certificates, the fraction (expressed as a percentage)
the numerator of which is the Class Certificate Balance of such Class of
Subordinate Certificates immediately prior to such Distribution Date and the
denominator of which is the aggregate of the Class Certificate Balances of all
Classes of Certificates immediately prior to such Distribution Date.

     Closing Date: March 30, 2007.

     Code: The Internal Revenue Code of 1986, as amended.

     Commission: The Securities and Exchange Commission.

     Compensating Interest Payment: As defined in Section 6.06.

     Cooperative: A corporation that has been formed for the purpose of
cooperative apartment ownership.

     Cooperative Assets: Shares issued by Cooperatives, the related Cooperative
Lease and any other collateral securing the Cooperative Loans.

     Cooperative Lease: With respect to a Cooperative Loan, the proprietary
lease or occupancy agreement with respect to the cooperative apartment occupied
by the Mortgagor and relating to the related Cooperative Assets, which lease or
agreement confers an exclusive right to the holder of such Cooperative Assets to
occupy such apartment.

     Cooperative Loan: The indebtedness of a Mortgagor evidenced by a Mortgage
Note which is secured by Cooperative Assets and which is being sold to the
Depositor pursuant to this Agreement, the Mortgage Loans so sold being
identified in the Mortgage Loan Schedule.

     Cooperative Stock: With respect to a Cooperative Loan, the single
outstanding class of stock, partnership interest or other ownership instrument
in the related Cooperative.

     Corporate Trust Office: With respect to the Trustee, the principal
corporate trust office of the Trustee at which at any particular time its
corporate trust business in connection with this Agreement shall be
administered, which office at the date of the execution of this instrument is
located at HSBC Bank USA, National Association, 452 Fifth Avenue, New York, New
York 10018, Attention: Issuer Services - Merrill Lynch Mortgage Investors, Inc.,
MLMBS Series 2007-1, or at such other address as the Trustee may designate from
time to time by notice to the Certificateholders, the Depositor and the Master
Servicer and with respect to the Securities Administrator, for Certificate
transfer purposes, Wells Fargo Center, Sixth Street and Marquette Avenue,
Minneapolis, Minnesota 55479, Attn: Corporate Trust Services - MLMBS 2007-1, and
for all other purposes, 9062 Old Annapolis Road, Columbia, Maryland, 21045,
Attn: Corporate Trust Services - MLMBS 2007-1.

     Countrywide: Countrywide Home Loans Servicing LP or any successor thereto.

     Countrywide Assignment Agreement: The Assignment, Assumption and
Recognition Agreement, dated as of March 1, 2007, among the Seller, the
Depositor, Countrywide and


                                      -10-

<PAGE>

Countrywide Home Loans, Inc., pursuant to which the Countrywide Servicing
Agreement (other than the rights to enforce the representations and warranties
with respect to the Countrywide Loans) were assigned to the Depositor for the
benefit of the Certificateholders.

     Countrywide Loans: The Mortgage Loans serviced by Countrywide pursuant to
the Countrywide Servicing Agreement.

     Countrywide Servicing Agreement: The Master Mortgage Loan Purchase and
Servicing Agreement dated as of November 1, 2004, between Countrywide Home Loans
Inc. and MLBUSA.

     Credit Support Depletion Date: The first Distribution Date on which the
Class Certificate Balances of the Subordinate Certificates are reduced to zero.

     Curtailment: Any Principal Prepayment made by a Mortgagor which is not a
Principal Prepayment in Full.

     Custodial Agreement: An agreement, dated as of the Closing Date among the
Depositor, the Master Servicer, the Securities Administrator, the Trustee and
the Custodian in substantially the form of Exhibit G hereto.

     Custodian: Wells Fargo Bank, N.A., including any successors in interest, or
any successor custodian appointed pursuant to the provisions hereof and of the
Custodial Agreement.

     Cut-off Date: March 1, 2007.

     Debt Service Reduction: Any reduction of the Monthly Payments which a
Mortgagor is obligated to pay with respect to a Mortgage Loan as a result of any
proceeding under the Bankruptcy Code or any other similar state law or other
proceeding.

     Defective Mortgage Loan: A Mortgage Loan replaced or to be replaced by one
or more Substitute Mortgage Loans.

     Deficient Valuation: With respect to any Mortgage Loan, a valuation of the
related Mortgaged Property by a court of competent jurisdiction in an amount
less than the then outstanding principal balance of the Mortgage Loan, which
valuation results from a proceeding initiated under the Bankruptcy Code.

     Definitive Certificates: As defined in Section 5.06.

     Depositor: Merrill Lynch Mortgage Investors, Inc., a Delaware corporation,
or any successor in interest.

     Depository: The Depository Trust Company, the nominee of which is Cede &
Co., or any successor thereto.


                                      -11-

<PAGE>

     Depository Participant: A broker, dealer, bank or other financial
institution or other Person for whom from time to time the Depository effects
book-entry transfers and pledges of securities deposited with the Depository.

     Designated Depository Institution: A depository institution (commercial
bank, federal savings bank, mutual savings bank or savings and loan association)
or trust company (which may include the Trustee), the deposits of which are
fully insured by the FDIC to the extent provided by law.

     Determination Date: With respect to each Mortgage Loan, the Determination
Date as defined in the related Servicing Agreement.

     Disqualified Organization: A "disqualified organization" as defined in
Section 860 E(e)(5) of the Code.

     Distribution Account: The trust account or accounts created and maintained
pursuant to Section 4.04, which shall be denominated "Wells Fargo Bank, National
Association, as Securities Administrator for HSBC Bank USA, National
Association, as Trustee f/b/o holders of Merrill Lynch Mortgage Backed
Securities Trust, Mortgage Pass-Through Certificates, MLMBS Series 2007-1 -
Distribution Account." The Distribution Account shall be an Eligible Account.

     Distribution Account Deposit Date: The Business Day prior to each
Distribution Date.

     Distribution Date: The 25th day of any month, beginning in April 2007, or,
if such 25th day is not a Business Day, the Business Day immediately following.

     Due Date: With respect to each Mortgage Loan, the date in each month on
which its Monthly Payment is due if such due date is the first day of a month
and otherwise is deemed to be the first day of the following month or such other
date specified in the related Servicing Agreement.

     Due Period: With respect to any Distribution Date and each Mortgage Loan,
the period commencing on the second day of the month preceding the month in
which the Distribution Date occurs and ending at the close of business on the
first day of the month in which the Distribution Date occurs.

     Eligible Account: Any of (i) a segregated account maintained with a federal
or state chartered depository institution (A) the short-term obligations of
which are rated A-1 or better by S&P and Fitch at the time of any deposit
therein or (B) insured by the FDIC (to the limits established by such
Corporation), the uninsured deposits (as evidenced in writing by the Rating
Agencies that use of any such account as the Distribution Account will not have
an adverse effect on the then-current ratings assigned to the Classes of
Certificates then rated by the Rating Agencies) in which account are otherwise
secured such that, as evidenced by an Opinion of Counsel (obtained by the Person
requesting that the account be held pursuant to this clause (i)) delivered to
the Securities Administrator prior to the establishment of such account, the
Certificateholders will have a claim with respect to the funds in such account
and a perfected first priority security interest against any collateral (which
shall be limited to Permitted Investments, each of which shall mature not later
than the Business Day immediately preceding


                                      -12-

<PAGE>

the Distribution Date next following the date of investment in such collateral
or the Distribution Date if such Permitted Investment is an obligation of the
institution that maintains the Distribution Account) securing such funds that is
superior to claims of any other depositors or general creditors of the
depository institution with which such account is maintained, (ii) a segregated
trust account or accounts maintained with a federal or state chartered
depository institution or trust company with trust powers acting in its
fiduciary capacity or (iii) a segregated account or accounts of a depository
institution acceptable to the Rating Agencies (as evidenced in writing by the
Rating Agencies that use of any such account as the Distribution Account will
not have an adverse effect on the then-current ratings assigned to the Classes
of the Certificates then rated by the Rating Agencies). Eligible Accounts may
bear interest.

     ERISA: The Employee Retirement Income Security Act of 1974, as amended.

     ERISA-Qualifying Underwriting: A best efforts or firm commitment
underwriting or private placement that would satisfy the requirements of
Prohibited Transaction Exemption 90-29, Exemption Application No. D-8012, 55
Fed. Reg. 21459 (1990), as amended, granted to the Underwriter by the United
States Department of Labor (or any other applicable underwriter's exemption
granted by the United States Department of Labor), except, in relevant part, for
the requirement that the certificates have received a rating at the time of
acquisition that is in one of the three (or four, in the case of a "designated
transaction") highest generic rating categories by at least one of the Rating
Agencies.

     ERISA Restricted Certificates: Any of the Class B-1, Class B-2, Class B-3
or Class P Certificates, and any other Certificate, as long as the acquisition
and holding of such Certificate is not covered by and exempt under an
underwriter's exemption.

     Event of Default: An event of default described in Section 8.01.

     Excess Liquidation Proceeds: To the extent that such amount is not required
by law to be paid to the related Mortgagor, the amount, if any, by which
Liquidation Proceeds with respect to a Liquidated Mortgage Loan exceed the sum
of (i) the Outstanding Principal Balance of such Mortgage Loan and accrued but
unpaid interest at the related Mortgage Interest Rate through the last day of
the month in which the related Liquidation Date occurs, plus (ii) related
Liquidation Expenses.

     Exchange Act: The Securities Exchange Act of 1934, as amended.

     Extraordinary Loss: Any Realized Loss or portion thereof caused by or
resulting from:

          (i) nuclear or chemical reaction or nuclear radiation or radioactive
     or chemical contamination, all whether controlled or uncontrolled and
     whether such loss be direct or indirect, proximate or remote;

          (ii) hostile or warlike action in time of peace or war, including
     action in hindering, combating or defending against an actual, impending or
     expected attack by any government or sovereign power, de jure or de facto,
     or by any authority maintaining or using military, naval or air forces, or
     by military, naval or air forces, or by an agent of any such government,
     power, authority or forces;


                                      -13-

<PAGE>

          (iii) any weapon of war employing atomic fission or radioactive forces
     whether in time of peace or war, and

          (iv) insurrection, rebellion, revolution, civil war, usurped power or
     action taken by governmental authority in hindering, combating or defending
     against such an occurrence, seizure or destruction under quarantine or
     customs regulations, confiscation by order of any government or public
     authority, or risks of contraband or illegal transactions or trade.

     Extraordinary Trust Fund Expenses: Any amounts reimbursable to the Master
Servicer or the Depositor pursuant to this Agreement, including but not limited
to Sections 4.03, 4.05 and 7.04, any amounts reimbursable to the Trustee and the
Securities Administrator from the Trust Fund pursuant to this Agreement,
including but not limited to Section 9.05, and any other costs, expenses,
liabilities and losses borne by the Trust Fund (exclusive of any cost, expense,
liability or loss that is specific to a particular Mortgage Loan or REO Property
and is taken into account in calculating a Realized Loss in respect thereof) for
which the Trust Fund has not and, in the reasonable good faith judgment of the
Securities Administrator, shall not, obtain reimbursement or indemnification
from any other Person.

     Fannie Mae: Federal National Mortgage Association or any successor thereto.

     FDIC: Federal Deposit Insurance Corporation or any successor thereto.

     Final Certification: The certification substantially in the form of Exhibit
Two to the Custodial Agreement.

     Fitch: Fitch Ratings or its successor in interest.

     Form 8-K Disclosure Information: As defined in Section 3.18(a).

     Freddie Mac: Freddie Mac, formerly the Federal Home Loan Mortgage
Corporation, or any successor thereto.

     Global Certificate: Any Private Certificate registered in the name of the
Depository or its nominee, beneficial interests in which are reflected on the
books of the Depository or on the books of a Person maintaining an account with
such Depository (directly or as an indirect participant in accordance with the
rules of such depository).

     Gross Margin: As to each Mortgage Loan, the fixed percentage set forth in
the related Mortgage Note and indicated on the Mortgage Loan Schedule which
percentage is added to the related Index on each Interest Adjustment Date to
determine (subject to rounding, the minimum and maximum Mortgage Interest Rate
and the Periodic Rate Cap) the Mortgage Interest Rate until the next Interest
Adjustment Date.

     Group I Available Funds: With respect to any Distribution Date and the
Group I Mortgage Loans, an amount equal to the excess of (i) the sum of (a) the
aggregate of the related Monthly Payments received on or prior to the related
Determination Date, (b) Liquidation Proceeds, Insurance Proceeds, Principal
Prepayments, Subsequent Recoveries and other


                                      -14-

<PAGE>

unscheduled recoveries of principal and interest in respect of the Group I
Mortgage Loans during the related Prepayment Period, (c) the aggregate of any
amounts received in respect of a related REO Property withdrawn from any
Protected Account and deposited in the Master Servicer Collection Account for
such Distribution Date, (d) the aggregate of any amounts deposited in the Master
Servicer Collection Account by the related Servicer or the Master Servicer in
respect of related Prepayment Interest Shortfalls for such Distribution Date,
(e) the aggregate of any related Monthly Advances made by the related Servicer
or the Master Servicer for such Distribution Date and (f) Prepayment Penalties
received with respect to the related Mortgage Loans, over (ii) the sum of (a)
related amounts reimbursable or payable to the related Servicer or the Master
Servicer pursuant to Sections 4.03 and 4.05, (b) related amounts deposited in
the Master Servicer Collection Account or the Distribution Account, as the case
may be, in error and (c) any Extraordinary Trust Fund Expenses.

     Group I Certificates: The Class I-A-1, Class I-A-2 and Class A-R
Certificates.

     Group I Mortgage Loans: The Mortgage Loans identified as such on the
Mortgage Loan Schedule.

     Group I Senior Accelerated Distribution Percentage: With respect to any
Distribution Date, the percentage indicated below:

<TABLE>
<CAPTION>
                                         Group I Senior Accelerated
      Distribution Date                   Distribution Percentage
      -----------------         ------------------------------------------
<S>                             <C>
April 2007 through March 2014   100%

April 2014 through March 2015   Group I Senior Percentage, plus 70% of the
                                Group I Subordinate Percentage

April 2015 through March 2016   Group I Senior Percentage, plus 60% of the
                                Group I Subordinate Percentage

April 2016 through March 2017   Group I Senior Percentage, plus 40% of the
                                Group I Subordinate Percentage

April 2017 through March 2018   Group I Senior Percentage, plus 20% of the
                                Group I Subordinate Percentage

April 2018 and thereafter       Group I Senior Percentage
</TABLE>

provided, however, (i) that any scheduled reduction to the Group I Senior
Accelerated Distribution Percentage described above shall not occur as of any
Distribution Date unless either (a)(1)(x) the outstanding principal balance of
Mortgage Loans delinquent 60 days or more (including foreclosure and REO
Property) averaged over the last six months as a percentage of the aggregate
outstanding Class Certificate Balance of the Class M Certificates and the Class
B Certificates, is less than 50%, or (y) the outstanding principal balance of
Mortgage Loans delinquent 60 days or more (including foreclosure and REO
Property) averaged over the last six months, as a percentage of the aggregate
outstanding principal balance of all Mortgage Loans averaged over the last six
months, does not exceed 2% and (2) Realized Losses on the Mortgage Loans to date
for such Distribution Date if occurring during the eighth, ninth, tenth,
eleventh or


                                      -15-

<PAGE>

twelfth year (or any year thereafter) after the Closing Date are less than 30%,
35%, 40%, 45% or 50%, respectively, of the sum of the Initial Class Certificate
Balances of the Class M Certificates and Class B Certificates or (b) (1) the
aggregate outstanding principal balance of the Mortgage Loans delinquent 60 days
or more (including foreclosure and REO Property) averaged over the last six
months, as a percentage of the aggregate outstanding principal balance of all
Mortgage Loans averaged over the last six months, does not exceed 4% and (2)
Realized Losses on the Mortgage Loans on or prior to such Distribution Date if
occurring during the eighth, ninth, tenth, eleventh or twelfth year (or any year
thereafter) after the Closing Date are less than 10%, 15%, 20%, 25% or 30%,
respectively, of the sum of the Initial Class Certificate Balances of the Class
M Certificates and Class B Certificates and (ii) that for any Distribution Date
on which the Group I Senior Percentage is greater than the Original Group I
Senior Percentage, the Group I Senior Accelerated Distribution Percentage and
Group II Senior Accelerated Distribution Percentage for such Distribution Date
shall be 100%. Notwithstanding the foregoing, upon the reduction of the
aggregate Class Certificate Balance of the Class I-A-1 and Class I-A-2
Certificates to zero, the Group I Senior Accelerated Distribution Percentage
will equal 0%.

     In addition, on any Distribution Date on or after the Distribution Date
occurring in April 2010, if the current weighted average of the Subordinate
Percentages for the Certificates is equal to or greater than two times the
initial weighted average of the Subordinate Percentages for the Certificates,
and (a) the outstanding principal balance of the Mortgage Loans delinquent 60
days or more (including for this purpose any such Mortgage Loans in foreclosure
or bankruptcy and such Mortgage Loans with respect to which the related
Mortgaged Property has been acquired by the Issuing Entity), averaged over the
last six months, as a percentage of the Subordinate Percentage for that
Distribution Date times the aggregate Stated Principal Balance of the Mortgage
Loans, does not exceed 50% and (b) cumulative Realized Losses on the Mortgage
Loans do not exceed 20% of the initial Subordinate Percentage times the
aggregate Stated Principal Balance of the Mortgage Loans as of the Cut-off Date,
then, in each case, the Group I Senior Accelerated Distribution Percentage for
such Distribution Date will be equal to, prior to the Distribution Date
occurring in April 2010, the Group I Senior Percentage plus 50% of the
Subordinate Percentage and, on or after the Distribution Date occurring in April
2010, the Group I Senior Percentage.

     Group I Senior Percentage: As of any Distribution Date, the lesser of 100%
and a fraction, expressed as a percentage, the numerator of which is the
aggregate Class Certificate Balance of the Class I-A Certificates immediately
prior to such Distribution Date and the denominator of which is the aggregate
Stated Principal Balance of all of the Group I Mortgage Loans or related REO
Properties immediately prior to such Distribution Date.

     Group I Senior Principal Distribution Amount: As to any Distribution Date,
the lesser of (a) the balance of the Group I Available Funds remaining after the
distribution of all amounts required to be distributed pursuant to subclauses
first, second and third of Section 6.01(A) and (b) the sum of the following:

               (A) the Group I Senior Percentage for such Distribution Date
     times the sum of the following:

                    (1) the principal portion of each Monthly Payment due during


                                      -16-

<PAGE>

          the related Due Period on each Outstanding Mortgage Loan in Loan Group
          I, whether or not received on or prior to the related Determination
          Date, minus the principal portion of any Debt Service Reduction;

                    (2) the Stated Principal Balance of any Group I Mortgage
          Loan repurchased during the related Prepayment Period pursuant to
          Section 2.02 or 2.03 hereof or pursuant to the related Servicing
          Agreement; and

                    (3) the principal portion of all other unscheduled
          collections, including Subsequent Recoveries (other than Principal
          Prepayments in Full and Curtailments and amounts received in
          connection with the liquidation or disposition of a Group I Mortgage
          Loan, including without limitation Insurance Proceeds, Liquidation
          Proceeds and REO Proceeds) received during the related Prepayment
          Period to the extent applied by the related Servicer as recoveries of
          principal of the related Mortgage Loan pursuant to related Servicing
          Agreement;

               (B) with respect to the liquidation or other disposition of a
     Group I Mortgage Loan which occurred during the related Prepayment Period
     and did not result in any Extraordinary Losses, an amount equal to the
     lesser of (a) the Group I Senior Percentage for such Distribution Date
     times the Stated Principal Balance of such Group I Mortgage Loan and (b)
     the Group I Senior Accelerated Distribution Percentage for such
     Distribution Date times the related unscheduled collections (including
     without limitation Insurance Proceeds, Liquidation Proceeds and REO
     Proceeds) to the extent applied by the related Servicer or the Master
     Servicer as recoveries of principal of the related Mortgage Loan pursuant
     to the related Servicing Agreement or this Agreement;

               (C) the Group I Senior Accelerated Distribution Percentage for
     such Distribution Date times the aggregate of all Principal Prepayments in
     Full and Curtailments received in the related Prepayment Period with
     respect to the Group I Mortgage Loans;

               (D) any amounts described in clauses (A), (B) or (C) of this
     definition, as determined for any previous Distribution Date, which remain
     unpaid after application of amounts previously distributed pursuant to this
     clause (D) to the extent that such amounts are not attributable to Realized
     Losses which have been allocated to the Class M Certificates or Class B
     Certificates;

     Group II Available Funds: With respect to any Distribution Date and the
Group II Mortgage Loans, an amount equal to the excess of (i) the sum of (a) the
aggregate of the related Monthly Payments received on or prior to the related
Determination Date, (b) Liquidation Proceeds, Insurance Proceeds, Principal
Prepayments, Subsequent Recoveries and other unscheduled recoveries of principal
and interest in respect of the Group II Mortgage Loans during the related
Prepayment Period, (c) the aggregate of any amounts received in respect of a
related REO Property withdrawn from any Protected Account and deposited in the
Master Servicer Collection Account for such Distribution Date, (d) the aggregate
of any amounts deposited in the Master Servicer Collection Account by the
related Servicer or the Master Servicer in respect of related Prepayment
Interest Shortfalls for such Distribution Date, (e) the


                                      -17-

<PAGE>

aggregate of any related Monthly Advances made by the related Servicer or the
Master Servicer for such Distribution Date and (f) Prepayment Penalties received
with respect to the related Mortgage Loans, over (ii) the sum of (a) related
amounts reimbursable or payable to the related Servicer or the Master Servicer
pursuant to Sections 4.03 and 4.05, (b) related amounts deposited in the Master
Servicer Collection Account or the Distribution Account, as the case may be, in
error and (c) any Extraordinary Trust Fund Expenses.

     Group II Certificates: The Class II-A-1 Certificates and Class II-A-2
Certificates.

     Group II Mortgage Loans: The Mortgage Loans identified as such on the
Mortgage Loan Schedule.

     Group II Senior Accelerated Distribution Percentage: With respect to any
Distribution Date, the percentage indicated below:

<TABLE>
<CAPTION>
                                        Group II Senior Accelerated
      Distribution Date                   Distribution Percentage
      -----------------         -------------------------------------------
<S>                             <C>
April 2007 through March 2014   100%

April 2014 through March 2015   Group II Senior Percentage, plus 70% of the
                                Group II Subordinate Percentage

April 2015 through March 2016   Group II Senior Percentage, plus 60% of the
                                Group II Subordinate Percentage

April 2016 through March 2017   Group II Senior Percentage, plus 40% of the
                                Group II Subordinate Percentage

April 2017 through March 2018   Group II Senior Percentage, plus 20% of the
                                Group II Subordinate Percentage

April 2018 and thereafter       Group II Senior Percentage
</TABLE>

provided, however, (i) that any scheduled reduction to the Group II Senior
Accelerated Distribution Percentage described above shall not occur as of any
Distribution Date unless either (a)(1)(x) the outstanding principal balance of
Mortgage Loans delinquent 60 days or more (including foreclosure and REO
Property) averaged over the last six months as a percentage of the aggregate
outstanding Class Certificate Balance of the Class M Certificates and the Class
B Certificates, is less than 50%, or (y) the outstanding principal balance of
Mortgage Loans delinquent 60 days or more (including foreclosure and REO
Property) averaged over the last six months, as a percentage of the aggregate
outstanding principal balance of all Mortgage Loans averaged over the last six
months, does not exceed 2% and (2) Realized Losses on the Mortgage Loans to date
for such Distribution Date if occurring during the eighth, ninth, tenth,
eleventh or twelfth year (or any year thereafter) after the Closing Date are
less than 30%, 35%, 40%, 45% or 50%, respectively, of the sum of the Initial
Class Certificate Balances of the Class M Certificates and Class B Certificates
or (b) (1) the aggregate outstanding principal balance of the Mortgage Loans
delinquent 60 days or more (including foreclosure and REO Property) averaged
over the last six months, as a percentage of the aggregate outstanding principal
balance of all Mortgage Loans averaged over the last six months, does not exceed
4% and (2) Realized Losses on the


                                      -18-

<PAGE>

Mortgage Loans on or prior to such Distribution Date if occurring during the
eighth, ninth, tenth, eleventh or twelfth year (or any year thereafter) after
the Closing Date are less than 10%, 15%, 20%, 25% or 30%, respectively, of the
sum of the Initial Class Certificate Balances of the Class M Certificates and
Class B Certificates and (ii) that for any Distribution Date on which the Group
II Senior Percentage is greater than the Original Group II Senior Percentage,
the Group I Senior Accelerated Distribution Percentage and Group II Senior
Accelerated Distribution Percentage for such Distribution Date shall be 100%.
Notwithstanding the foregoing, upon the reduction of the aggregate Class
Certificate Balance of the Class II-A-1 and Class II-A-2 Certificates to zero,
the Group II Senior Accelerated Distribution Percentage will equal 0%.

     In addition, on any Distribution Date on or after the Distribution Date
occurring in April 2010, if the current weighted average of the Subordinate
Percentages for the Certificates is equal to or greater than two times the
initial weighted average of the Subordinate Percentages for the Certificates,
and (a) the outstanding principal balance of the Mortgage Loans delinquent 60
days or more (including for this purpose any such Mortgage Loans in foreclosure
or bankruptcy and such Mortgage Loans with respect to which the related
Mortgaged Property has been acquired by the Trust), averaged over the last six
months, as a percentage of the Subordinate Percentage for that Distribution Date
times the aggregate Stated Principal Balance of the Mortgage Loans, does not
exceed 50% and (b) cumulative Realized Losses on the Mortgage Loans do not
exceed 20% of the initial Subordinate Percentage times the aggregate Stated
Principal Balance of the Mortgage Loans as of the Cut-off Date, then, in each
case, the Group II Senior Accelerated Distribution Percentage for such
Distribution Date will be equal to, prior to the Distribution Date occurring in
April 2010, the Group II Senior Percentage plus 50% of the Subordinate
Percentage and, on or after the Distribution Date occurring in April 2010, the
Group II Senior Percentage.

     Group II Senior Percentage: As of any Distribution Date, the lesser of 100%
and a fraction, expressed as a percentage, the numerator of which is the
aggregate Class Certificate Balance of the Class II-A-1 and Class II-A-2
Certificates immediately prior to such Distribution Date and the denominator of
which is the aggregate Stated Principal Balance of all of the Group II Mortgage
Loans or related REO Properties immediately prior to such Distribution Date.

     Group II Senior Principal Distribution Amount: As to any Distribution Date,
the lesser of (a) the balance of the Group II Available Funds remaining after
the distribution of all amounts required to be distributed pursuant to
subclauses first, second and third of Section 6.01(B) and (b) the sum of the
following:

               (A) the Group II Senior Percentage for such Distribution Date
     times the sum of the following:

                    (1) the principal portion of each Monthly Payment due during
          the related Due Period on each Outstanding Mortgage Loan in Loan Group
          II, whether or not received on or prior to the related Determination
          Date, minus the principal portion of any Debt Service Reduction;

                    (2) the Stated Principal Balance of any Group II Mortgage
          Loan repurchased during the related Prepayment Period pursuant to
          Section 2.02 or 2.03 hereof or the related Servicing Agreement; and


                                      -19-

<PAGE>

                    (3) the principal portion of all other unscheduled
          collections, including Subsequent Recoveries (other than Principal
          Prepayments in Full and Curtailments and amounts received in
          connection with the liquidation or disposition of a Group II Mortgage
          Loan, including without limitation Insurance Proceeds, Liquidation
          Proceeds and REO Proceeds) received during the related Prepayment
          Period to the extent applied by the related Servicer as recoveries of
          principal of the related Mortgage Loan pursuant to related Servicing
          Agreement;

               (B) with respect to the liquidation or other disposition of a
     Group II Mortgage Loan which occurred during the related Prepayment Period
     and did not result in any Extraordinary Losses, an amount equal to the
     lesser of (a) the Group II Senior Percentage for such Distribution Date
     times the Stated Principal Balance of such Group II Mortgage Loan and (b)
     the Group II Senior Accelerated Distribution Percentage for such
     Distribution Date times the related unscheduled collections (including
     without limitation Insurance Proceeds, Liquidation Proceeds and REO
     Proceeds) to the extent applied by the related Servicer or the Master
     Servicer as recoveries of principal of the related Mortgage Loan pursuant
     to the related Servicing Agreement or this Agreement;

               (C) the Group II Senior Accelerated Distribution Percentage for
     such Distribution Date times the aggregate of all Principal Prepayments in
     Full and Curtailments received in the related Prepayment Period with
     respect to the Group II Mortgage Loans;

               (D) any amounts described in clauses (A), (B) or (C) of this
     definition, as determined for any previous Distribution Date, which remain
     unpaid after application of amounts previously distributed pursuant to this
     clause (D) to the extent that such amounts are not attributable to Realized
     Losses which have been allocated to the Class M Certificates or Class B
     Certificates;

     Highest Priority: As of any date of determination, the Class of Subordinate
Certificates then outstanding with the earliest priority for payments pursuant
to Section 6.01, in the following order: Class M-1, Class M-2, Class M-3, Class
B-1, Class B-2 and Class B-3 Certificates.

     Indemnified Persons: The Trustee, the Master Servicer, the Depositor and
the Securities Administrator and their officers, directors, agents and employees
and, with respect to the Trustee, any separate co-trustee and its officers,
directors, agents and employees.

     Independent: When used with respect to any specified Person, any such
Person who (a) is in fact independent of the Depositor, the Master Servicer and
their respective Affiliates, (b) does not have any direct financial interest in
or any material indirect financial interest in the Depositor or the Master
Servicer or any Affiliate thereof, and (c) is not connected with the Depositor
or the Master Servicer or any Affiliate thereof as an officer, employee,
promoter, underwriter, trustee, partner, director or Person performing similar
functions; provided, however, that a Person shall not fail to be Independent of
the Depositor or the Master Servicer or any Affiliate thereof merely because
such Person is the beneficial owner of 1% or less of any class of securities
issued by the Depositor or the Master Servicer or any Affiliate thereof, as the
case may be.


                                      -20-

<PAGE>

     Index: The index, if any, specified in a Mortgage Note by reference to
which the related Mortgage Interest Rate will be adjusted from time to time.

     Individual Certificate: Any Private Certificate registered in the name of
the Holder other than the Depository or its nominee.

     IndyMac: IndyMac Bank, F.S.B. or any successor thereto.

     IndyMac Assignment Agreement: The Assignment, Assumption and Recognition
Agreement, dated as of March 1, 2007, among the Seller, the Depositor and
IndyMac, pursuant to which the IndyMac Servicing Agreement (other than the
rights to enforce the representations and warranties with respect to the IndyMac
Loans) were assigned to the Depositor for the benefit of the Certificateholders.

     IndyMac Loans: The Mortgage Loans serviced by IndyMac pursuant to the
IndyMac Servicing Agreement.

     IndyMac Servicing Agreement: The Master Seller's Warranties and Servicing
Agreement, dated as of May 1, 2006, between IndyMac and the Seller.

     Initial Certification: The certification substantially in the form of
Exhibit One to the Custodial Agreement.

     Initial Class Certificate Balance: With respect to any Regular Certificate,
the amount designated "Initial Class Certificate Balance" on the face thereof.

     Initial Optional Termination Date: The first Distribution Date following
the date on which the aggregate Stated Principal Balance of the Mortgage Loans
is less than 5% of the aggregate Stated Principal Balance of the Mortgage Loans
as of the Cut-off Date.

     Initial Subordinate Class Percentage: With respect to each Class of
Subordinate Certificates, an amount which is equal to the initial aggregate
Class Certificate Balance of such Class of Subordinate Certificates divided by
the aggregate Stated Principal Balance of all the Mortgage Loans as of the
Cut-off Date as follows:

<TABLE>
<S>                <C>
Class M-1: 2.00%   Class B-1: 0.40%

Class M-2: 0.75%   Class B-2: 0.25%

Class M-3: 0.55%   Class B-3: 0.30%
</TABLE>

     Insurance Policy: With respect to any Mortgage Loan, any standard hazard
insurance policy, flood insurance policy or title insurance policy.

     Insurance Proceeds: Amounts paid by the insurer under any Insurance Policy
covering any Mortgage Loan or Mortgaged Property other than amounts required to
be paid over to the Mortgagor pursuant to law or the related Mortgage Note or
Security Instrument and other than amounts used to repair or restore the
Mortgaged Property or to reimburse insured expenses.


                                      -21-

<PAGE>

     Interest Accrual Period: With respect to each Distribution Date, for each
Class of Certificates, the calendar month preceding the month in which such
Distribution Date occurs.

     Interest Adjustment Date: With respect to a Mortgage Loan, the date, if
any, specified in the related Mortgage Note on which the Mortgage Interest Rate
is subject to adjustment.

     Investor Representation Letter: As defined in Section 5.02(b).

     Issuing Entity: Merrill Lynch Mortgage Backed Securities Trust, Series
2007-1.

     Latest Possible Maturity Date: The Distribution Date in March 2037.

     Liquidated Mortgage Loan: Any defaulted Mortgage Loan (including any REO
Property) as to which the related Servicer has determined that all amounts it
expects to recover from or on account of such Mortgage Loan have been recovered.

     Liquidation Date: With respect to any Liquidated Mortgage Loan, the date on
which the related Servicer has certified that such Mortgage Loan has become a
Liquidated Mortgage Loan.

     Liquidation Expenses: With respect to a Mortgage Loan in liquidation,
unreimbursed expenses paid or incurred by or for the account of the Master
Servicer or the related Servicer in connection with the liquidation of such
Mortgage Loan and the related Mortgaged Property, such expenses including (a)
property protection expenses, (b) property sales expenses, (c) foreclosure and
sale costs, including court costs and reasonable attorneys' fees, and (d)
similar expenses reasonably paid or incurred in connection with liquidation.

     Liquidation Proceeds: With respect to any Mortgage Loan, cash received in
connection with the liquidation of a defaulted Mortgage Loan, whether through
trustee's sale, foreclosure sale or otherwise, and amounts received through
Insurance Proceeds and condemnation proceeds.

     Loan-to-Value Ratio: With respect to any Mortgage Loan, the fraction,
expressed as a percentage, the numerator of which is the original principal
balance of the related Mortgage Loan and the denominator of which is the
Original Value of the related Mortgaged Property.

     Loan Group: Loan Group I or Loan Group II, as applicable.

     Loan Group I: The group of Mortgage Loans designated as belonging to Loan
Group I on the Mortgage Loan Schedule.

     Loan Group I Net WAC: The weighted average of the Net Mortgage Rates on the
Group I Mortgage Loans weighted on the basis of the respective Stated Principal
Balance of each such Mortgage Loan as of the beginning of the Due Period
immediately preceding such Distribution Date.

     Loan Group II: The group of Mortgage Loans designated as belonging to Loan
Group II on the Mortgage Loan Schedule.


                                      -22-

<PAGE>

     Loan Group II Net WAC: The weighted average of the Net Mortgage Rates on
the Group II Mortgage Loans weighted on the basis of the respective Stated
Principal Balance of each such Mortgage Loan as of the beginning of the Due
Period immediately preceding such Distribution Date.

     Lower Priority: As of any date of determination and with respect to any
Class of Subordinate Certificates, any other Class of Subordinate Certificates
then outstanding with a later priority for payments pursuant to Section 6.01.

     Lower Tier Regular Interests: Any of the REMIC 1 Regular Interests.

     Lower Tier REMIC Interests: Any of the REMIC 1 Interests.

     Lowest Priority: As of any date of determination, the Class of Subordinate
Certificates then outstanding with the latest priority for payments pursuant to
Section 6.01, in the following order: Class B-3, Class B-2, Class B-1, Class
M-3, Class M-2 and Class M-1 Certificates.

     Lost Notes: The original Mortgage Notes that have been lost, as indicated
on the Mortgage Loan Schedule.

     Majority Certificateholders: The Holders of Certificates evidencing at
least 51% of the Voting Rights.

     Master Servicer: Wells Fargo Bank, N.A. including any successors in
interest who meet the qualifications of the Servicing Agreements and this
Agreement, and any successor master servicer appointed hereunder.

     Master Servicer Collection Account: The trust account or accounts created
and maintained pursuant to Section 4.02, which shall be denominated "Wells Fargo
Bank, National Association as Master Servicer for HSBC Bank USA, National
Association, as Trustee f/b/o holders of Merrill Lynch Mortgage Backed
Securities Trust, Mortgage Pass-Through Certificates, MLMBS Series 2007-1 -
Master Servicer Collection Account." The Master Servicer Collection Account
shall be an Eligible Account.

     Master Servicing Compensation: The meaning specified in Section 3.14.

     Maximum Lifetime Mortgage Rate: The maximum level to which a Mortgage
Interest Rate can adjust in accordance with its terms, regardless of changes in
the applicable Index.

     Minimum Lifetime Mortgage Rate: The minimum level to which a Mortgage
Interest Rate can adjust in accordance with its terms, regardless of changes in
the applicable Index.

     MLBUSA: Merrill Lynch Bank, USA.

     MLML: Merrill Lynch Mortgage Lending, Inc., a Delaware corporation, or any
successor in interest.


                                      -23-

<PAGE>

     Monthly Advance: An advance of principal or interest required to be made by
the applicable Servicer pursuant to the related Servicing Agreement or the
Master Servicer pursuant to Section 6.05.

     Monthly Payment: With respect to any Mortgage Loan, the scheduled monthly
payment of principal and interest on such Mortgage Loan which is payable by the
related Mortgagor from time to time under the related Mortgage Note, determined:
(a) after giving effect to (i) any Deficient Valuation and/or Debt Service
Reduction with respect to such Mortgage Loan and (ii) any reduction in the
amount of interest collectible from the related Mortgagor pursuant to the Relief
Act; (b) without giving effect to any extension granted or agreed to by the
related Servicer pursuant to related Servicing Agreement; and (c) on the
assumption that all other amounts, if any, due under such Mortgage Loan are paid
when due.

     Monthly Principal: The principal portion of any Monthly Payment.

     Monthly Statement: The statement distributed to Certificateholders pursuant
to Section 6.04.

     Moody's: Moody's Investors Service, Inc. or its successor in interest.

     Mortgage: The mortgage, deed of trust or other instrument creating a first
lien on, or first priority security interest in, a Mortgaged Property securing a
Mortgage Note.

     Mortgage File: The mortgage documents listed in Section 2.01(b) pertaining
to a particular Mortgage Loan and any additional documents required to be added
to the Mortgage File pursuant to this Agreement.

     Mortgage Interest Rate: The annual rate at which interest accrues from time
to time on any Mortgage Loan pursuant to the related Mortgage Note, which rate
is equal to the "Mortgage Interest Rate" set forth with respect thereto on the
Mortgage Loan Schedule.

     Mortgage Loan: A mortgage loan transferred and assigned to the Trustee
pursuant to Section 2.01 or Section 2.04 and held as a part of the Trust Fund,
as identified in the Mortgage Loan Schedule, including a mortgage loan the
property securing which has become an REO Property.

     Mortgage Loan Purchase Agreement: The Mortgage Loan Purchase Agreement
dated as of March 30, 2007, between the Seller and the Depositor, as purchaser,
and all amendments thereof and supplements thereto, attached hereto as Exhibit
J.

     Mortgage Loan Schedule: The schedule, attached hereto as Exhibit B with
respect to the Mortgage Loans and as amended from time to time to reflect the
repurchase or substitution of Mortgage Loans pursuant to this Agreement.

     Mortgage Note: The originally executed note or other evidence of the
indebtedness of a Mortgagor under the related Mortgage Loan.


                                      -24-

<PAGE>

     Mortgage Pool: The pool of Mortgage Loans, identified on Exhibit B from
time to time, and any REO Properties acquired in respect thereof.

     Mortgaged Property: Land and improvements securing the indebtedness of a
Mortgagor under the related Mortgage Loan or, in the case of REO Property, such
REO Property.

     Mortgagor: The obligor on a Mortgage Note.

     National City: National City Mortgage Co., or any successor thereto.

     National City Assignment Agreement: The Assignment, Assumption and
Recognition Agreement, dated as of March 1, 2007, among National City, the
Depositor and the Seller pursuant to which the National City Servicing Agreement
and the rights of the Seller thereunder (other than the rights to enforce the
representations and warranties with respect to the National City Loans) were
assigned to the Depositor for the benefit of the Certificateholders.

     National City Loans: The Mortgage Loans serviced by National City pursuant
to the National City Servicing Agreement.

     National City Servicing Agreement: The Master Seller's Warranties and
Servicing Agreement, dated as of May 1, 2004, between Merrill Lynch Bank, USA
and National City, as amended.

     Net Liquidation Proceeds: As to any Liquidated Mortgage Loan, Liquidation
Proceeds net of (i) Liquidation Expenses which are payable therefrom by the
related Servicer or the Master Servicer in accordance with the related Servicing
Agreement or this Agreement and (ii) unreimbursed advances by the related
Servicer or the Master Servicer and Monthly Advances.

     Net Mortgage Rate: With respect to each Mortgage Loan, the Mortgage
Interest Rate in effect from time to time less the Servicing Fee Rate (expressed
as a per annum rate).

     Net WAC: The weighted average of the Net Mortgage Rates on the Mortgage
Loans weighted on the basis of the respective Stated Principal Balance of each
such Mortgage Loan as of the beginning of the Due Period immediately preceding
such Distribution Date.

     Nonrecoverable Advance: With respect to any Mortgage Loan any advance or
Monthly Advance (i) which was previously made or is proposed to be made by the
applicable Servicer, or the Master Servicer as successor Servicer, or the
Trustee as successor Master Servicer and (ii) which, in the good faith judgment
of the Master Servicer, the Trustee or applicable Servicer, will not or, in the
case of a proposed advance or Monthly Advance, would not, be ultimately
recoverable by the Master Servicer, the Trustee (as successor Master Servicer)
or applicable Servicer from Liquidation Proceeds, Insurance Proceeds or future
payments on the Mortgage Loan for which such advance or Monthly Advance was
made.

     Offered Certificate: Any Senior Certificate or Offered Subordinate
Certificate.

     Offered Subordinate Certificates: The Class M-l, Class M-2 and Class M-3
Certificates.


                                      -25-

<PAGE>

     Officer's Certificate: A certificate signed by the Chairman of the Board,
the Vice Chairman of the Board, the President or a Vice President or Assistant
Vice President or other authorized officer of the Master Servicer or the
Depositor, as applicable, and delivered to the Trustee, as required by this
Agreement.

     Opinion of Counsel: A written opinion of counsel who is or are acceptable
to the Trustee and who, unless required to be Independent (an "Opinion of
Independent Counsel"), may be internal counsel for the Master Servicer or the
Depositor.

     Optional Termination: The termination of the Trust Fund hereunder pursuant
to Section 10.01(a) hereof.

     Optional Termination Amount: The amount received by the Securities
Administrator in connection with any purchase of all of the Mortgage Loans and
REO Properties pursuant to Section 10.01(b) hereof.

     Optional Termination Price: On any date after the Initial Optional
Termination Date, an amount equal to the sum of (A) the aggregate Stated
Principal Balance of each Mortgage Loan (other than any Mortgage Loan that has
become an REO Property) as of the Distribution Date on which the proceeds of the
Optional Termination are distributed to the Certificateholders, plus accrued
interest thereon at the applicable Mortgage Rate as of the Due Date preceding
the Distribution Date on which the proceeds of the Optional Termination are
distributed to Certificateholders and the fair market value of any REO Property,
plus accrued interest thereon as of the Distribution Date on which the proceeds
of the Optional Termination are distributed to Certificateholders, (B) any
unreimbursed out-of-pocket costs and expenses owed to the Master Servicer, the
Trustee or the Securities Administrator (including any amounts incurred by the
Securities Administrator in connection with conducting the Auction), a Servicer
or the Master Servicer and any unpaid or unreimbursed Servicing Fees, Monthly
Advances and Servicing Advances, (C) any unreimbursed costs, penalties and/or
damages incurred by the Trust Fund in connection with any violation relating to
any of the Mortgage Loans of any predatory or abusive lending law and (D) in the
event an Auction has been conducted, all reasonable fees and expenses incurred
by the Securities Administrator to conduct the Auction.

     Original Subordinate Principal Balance: The sum of the aggregate Class
Certificate Balances of each Class of Subordinate Certificates as of the Closing
Date.

     Original Value: The lesser of (i) the Appraised Value or (ii) the sales
price of a Mortgaged Property at the time of origination of a Mortgage Loan,
except in instances where either clauses (i) or (ii) is unavailable, the other
may be used to determine the Original Value, or if both clauses (i) and (ii) are
unavailable, Original Value may be determined from other sources reasonably
acceptable to the Depositor.

     Outstanding Mortgage Loan: With respect to any Due Date, a Mortgage Loan
which, prior to such Due Date, was not the subject of a Principal Prepayment in
Full, did not become a Liquidated Mortgage Loan and was not purchased or
replaced.

     Outstanding Principal Balance: As of the time of any determination, the
principal balance of a Mortgage Loan remaining to be paid by the Mortgagor, or,
in the case of an REO


                                      -26-

<PAGE>

Property, the principal balance of the related Mortgage Loan remaining to be
paid by the Mortgagor at the time such property was acquired by the Trust Fund
less any Net Liquidation Proceeds with respect thereto to the extent applied to
principal.

     Ownership Interest: As to any Certificate, any ownership or security
interest in such Certificate, including any interest in such Certificate as the
Holder thereof and any other interest therein, whether direct or indirect, legal
or beneficial, as owner or as pledgee.

     Pass-Through Rate: With respect to the Certificates and any Distribution
Date, the following:

               (i) For the Class I-A-1 Certificates, the Class I-A-2
          Certificates and the Class A-R Certificate on each Distribution Date,
          a per annum rate equal to the Loan Group I Net WAC for such
          Distribution Date.

               (ii) For the Class II-A-1 Certificates and the Class II-A-2
          Certificates on each Distribution Date, a per annum rate equal to the
          Loan Group II Net WAC for such Distribution Date.

               (iii) For each class of Class M Certificates and Class B
          Certificates on each Distribution Date a per annum rate equal to the
          Subordinate Net WAC.

     Paying Agent: The Securities Administrator or any successor Paying Agent
appointed by the Securities Administrator.

     Percentage Interest: With respect to any Certificate (other than the Class
A-R and Class P Certificates), a fraction, expressed as a percentage, the
numerator of which is the Initial Class Certificate Balance represented by such
Certificate and the denominator of which is the Initial Class Certificate
Balance of the related Class. With respect to the Class A-R and Class P
Certificates, the Percentage Interest evidenced thereby shall be as specified on
the face thereof, or otherwise, be equal to 100%.

     Periodic Rate Cap: With respect to each Mortgage Loan, the maximum
adjustment that can be made to the Mortgage Interest Rate on each Interest
Adjustment Date in accordance with its terms, regardless of changes in the
applicable Index.

     Permitted Investments: Any one or more of the following obligations or
securities held in the name of the Trustee for the benefit of the
Certificateholders (provided that such obligation or security must be a
"permitted investment" within the meaning of such term as provided for in
Section 860G(a)(5) of the Code):

          (v) direct obligations of, and obligations the timely payment of which
     are fully guaranteed by the United States of America or any agency or
     instrumentality of the United States of America the obligations of which
     are backed by the full faith and credit of the United States of America;

          (vi) (a) demand or time deposits, federal funds or bankers'
     acceptances issued by any depository institution or trust company
     incorporated under the laws of the United


                                      -27-

<PAGE>

     States of America or any state thereof (including the Trustee or the Master
     Servicer or its Affiliates acting in its commercial banking capacity) and
     subject to supervision and examination by federal and/or state banking
     authorities, provided that the commercial paper and/or the short-term debt
     rating and/or the long-term unsecured debt obligations of such depository
     institution or trust company at the time of such investment or contractual
     commitment providing for such investment have the Applicable Credit Rating
     or better from each Rating Agency and (b) any other demand or time deposit
     or certificate of deposit that is fully insured by the Federal Deposit
     Insurance Corporation;

          (vii) repurchase obligations with respect to (a) any security
     described in clause (i) above or (b) any other security issued or
     guaranteed by an agency or instrumentality of the United States of America,
     the obligations of which are backed by the full faith and credit of the
     United States of America, in either case entered into with a depository
     institution or trust company (acting as principal) described in clause
     (ii)(a) above where the Trustee holds the security therefor;

          (viii) securities bearing interest or sold at a discount issued by any
     corporation (including the Trustee or the Master Servicer or its
     Affiliates) incorporated under the laws of the United States of America or
     any state thereof that have the Applicable Credit Rating or better from
     each Rating Agency at the time of such investment or contractual commitment
     providing for such investment; provided, however, that securities issued by
     any particular corporation will not be Permitted Investments to the extent
     that investments therein will cause the then outstanding principal amount
     of securities issued by such corporation and held as part of the Issuing
     Entity to exceed 10% of the aggregate Outstanding Principal Balances of all
     the Mortgage Loans and Permitted Investments held as part of the Issuing
     Entity;

          (ix) commercial paper (including both non-interest-bearing discount
     obligations and interest-bearing obligations payable on demand or on a
     specified date not more than one year after the date of issuance thereof)
     having the Applicable Credit Rating or better from each Rating Agency at
     the time of such investment;

          (x) a Reinvestment Agreement issued by any bank, insurance company or
     other corporation or entity;

          (xi) any other demand, money market or time deposit, obligation,
     security or investment as may be acceptable to either Rating Agency as
     evidenced in writing by each Rating Agency to the Trustee or Master
     Servicer;

          (xii) any money market or common trust fund having the Applicable
     Credit Rating or better from each Rating Agency (if such fund is rated by
     each Rating Agency), including any such fund for which the Trustee or
     Master Servicer or any affiliate of the Trustee or Master Servicer acts as
     a manager or an advisor; provided, however, that no instrument or security
     shall be a Permitted Investment if such instrument or security evidences a
     right to receive only interest payments with respect to the obligations
     underlying such instrument or if such security provides for payment of both
     principal and


                                      -28-

<PAGE>

     interest with a yield to maturity in excess of 120% of the yield to
     maturity at par or if such instrument or security is purchased at a price
     greater than par; and

          (xiii) units of a taxable money-market portfolio having the highest
     rating assigned by each Rating Agency (except if S&P is a Rating Agency,
     "AAAm" or "AAAM-G" by S&P) and restricted to obligations issued or
     guaranteed by the United States of America or entities whose obligations
     are backed by the full faith and credit of the United States of America and
     repurchase agreements collateralized by such obligations.

     Permitted Transferee: Any Person other than a Disqualified Organization or
an "electing large partnership" (as defined by Section 775 of the Code).

     Person: Any individual, corporation, partnership, joint venture,
association, limited liability company, joint-stock company, trust,
unincorporated organization or government or any agency or political subdivision
thereof.

     PHH: PHH Mortgage Corporation, formerly known as Cendant Mortgage
Corporation, or any successor thereto.

     PHH Assignment Agreement: The Assignment, Assumption and Recognition
Agreement, dated as of March 1, 2007, among the Seller, the Depositor and PHH,
pursuant to which the PHH Servicing Agreement (other than the rights to enforce
the representations and warranties with respect to the PHH Loans) were assigned
to the Depositor for the benefit of the Certificateholders.

     PHH Loans: The Mortgage Loans serviced by PHH pursuant to the PHH Servicing
Agreement.

     PHH Servicing Agreement: The Mortgage Loan Flow Purchase, Sale and
Servicing Agreement, dated as of March 27, 2001, among Merrill Lynch Mortgage
Capital, Inc., PHH and Bishop's Gate Residential Mortgage Trust.

     Physical Certificate: The Residual Certificate.

     Prepayment Assumption: A rate or rates of prepayment, as described in the
Prospectus Supplement related to the Offered Certificates.

     Prepayment Distribution Trigger: With respect to any Distribution Date and
any Class of Subordinate Certificates (other than the Class M-1 Certificates), a
test that shall be satisfied if the fraction (expressed as a percentage) equal
to the sum of the Class Certificate Balances of such Class and each Class of
Subordinate Certificates with a Lower Priority than such Class immediately prior
to such Distribution Date divided by the aggregate Stated Principal Balance of
all of the Mortgage Loans (or related REO Properties) immediately prior to such
Distribution Date is greater than or equal to the sum of the related Initial
Subordinate Class Percentages of such Classes of Subordinate Certificates.


                                      -29-

<PAGE>

     Prepayment Interest Shortfall: As to any Distribution Date and any Mortgage
Loan (other than a Mortgage Loan relating to an REO Property) that was the
subject of (a) a Principal Prepayment in Full during the related Prepayment
Period, an amount equal to the excess of one month's interest at the Net
Mortgage Rate on the Stated Principal Balance of such Mortgage Loan over the
amount of interest (adjusted to the Net Mortgage Rate) paid by the Mortgagor for
such Prepayment Period to the date of such Principal Prepayment in Full or (b) a
Curtailment during the prior calendar month, an amount equal to one month's
interest at the Net Mortgage Rate on the amount of such Curtailment. The
obligations of the Master Servicer in respect of any Prepayment Interest
Shortfall are set forth in Section 6.06.

     Prepayment Penalty: With respect to any Prepayment Period, any prepayment
premium, charge or penalty payable by a Mortgagor in connection with any
Principal Prepayment on the Prepayment Penalty Mortgage Loans.

     Prepayment Penalty Mortgage Loans: Any of the Mortgage Loans set forth on
Schedule I hereto that are subject to existing prepayment premiums.

     Prepayment Period: With respect to any Mortgage Loan and any Distribution
Date, the calendar month preceding the month in which such Distribution Date
occurs.

     Primary Mortgage Insurance Policy: Any primary mortgage guaranty insurance
policy issued in connection with a Mortgage Loan which provides compensation to
a Mortgage Note holder in the event of default by the obligor under such
Mortgage Note or the related Security Instrument, if any or any replacement
policy therefor through the related Interest Accrual Period for such Class
relating to a Distribution Date.

     Principal Prepayment: Any Principal Prepayment in full or Curtailment or
other recovery of principal on a Mortgage Loan which is received in advance of
its scheduled Due Date to the extent that it is not accompanied by an amount as
to interest representing scheduled interest due on any date or dates in any
month or months subsequent to the month of prepayment, including Insurance
Proceeds and Repurchase Proceeds, but excluding the principal portion of Net
Liquidation Proceeds.

     Principal Prepayment in Full: Any Principal Prepayment made by a Mortgagor
of the entire unpaid principal balance of the Mortgage Loan.

     Private Certificates: Any of the Class B-1, Class B-2, and Class B-3
Certificates.

     Prospectus Supplement: The Prospectus Supplement dated March 28, 2007,
relating to the public offering of the Offered Certificates.

     Protected Account: An account established and maintained for the benefit of
Certificateholders by each Servicer with respect to the related Mortgage Loans
and with respect to REO Property pursuant to the respective Servicing Agreement.
The Protected Account shall be an Eligible Account.

     Purchase Price: With respect to any Mortgage Loan or REO Property to be
purchased pursuant to or as contemplated by Section 2.03 or 10.01, and as
confirmed by an Officers'


                                      -30-

<PAGE>

Certificate from the Master Servicer to the Trustee, an amount equal to the sum
of (i) 100% of the Stated Principal Balance thereof as of the date of purchase
(or such other price as provided in Section 10.01), (ii) accrued interest on
such Stated Principal Balance at the applicable Mortgage Interest Rate in effect
from time to time from the Due Date as to which interest was last covered by a
payment by the Mortgagor or an advance by the related Servicer or Master
Servicer, which payment or advance had as of the date of purchase been
distributed to Certificateholders, through the end of the calendar month in
which the purchase is to be effected less any unreimbursed Monthly Advances and
any unpaid Servicing Fees payable to the purchaser of the Mortgage Loan and
(iii) any costs and damages incurred by the Issuing Entity in connection with
any violation by such Mortgage Loan or REO Property of any predatory or
abusive-lending law.

     Qualified Insurer: Any insurance company duly qualified as such under the
laws of the state or states in which the related Mortgaged Property or Mortgaged
Properties is or are located, duly authorized and licensed in such state or
states to transact the type of insurance business in which it is engaged and
approved as an insurer by the Master Servicer, so long as the claims paying
ability of which is acceptable to the Rating Agencies for pass-through
certificates having the same rating as the Certificates rated by the Rating
Agencies as of the Closing Date.

     Rating Agencies: Fitch and S&P.

     Realized Loss: With respect to a Liquidated Mortgage Loan, the amount by
which the remaining unpaid principal balance of the Mortgage Loan exceeds the
amount of Liquidation Proceeds applied to the principal balance of the related
Mortgage Loan. To the extent the Master Servicer receives Subsequent Recoveries
with respect to any Mortgage Loan, the amount of the Realized Loss with respect
to that Mortgage Loan will be reduced to the extent such recoveries are applied
to reduce the Class Certificate Balance of any Class of Certificates on any
Distribution Date.

     Record Date: With respect to each Distribution Date and each class of
Offered Certificates, the close of business on the last Business Day of the
month immediately preceding the month in which the related Distribution Date
occurs.

     Reference Banks: Those banks (i) with an established place of business in
London, England, (ii) not controlling, under the control of or under common
control with the Depositor or the Securities Administrator, (iii) that have been
designated as such by the Securities Administrator and (iv) that are engaged in
transactions in the London interbank market.

     Refinanced Mortgage Loan: Any Mortgage Loan the proceeds of which were not
used to purchase the related Mortgaged Property.

     Regular Certificates: Any of the Class I-A-1, Class I-A-2, Class II-A-1,
Class II-A-2, Class M-1, Class M-2, Class M-3, Class B-1, Class B-2 or Class B-3
Certificates.

     Regulation AB: Subpart 22.1100 - Asset Backed Securities (Regulation AB),
17 C.F.R. Sections 229.1100-229.1123, as such may be amended from time to time,
and subject to such clarification and interpretation as have been provided by
the Commission in the adopting release (Asset-Backed Securities, Securities Act
Release No. 33-8518, 70 Fed Reg. 1,506-1,631 (Jan. 7,


                                      -31-

<PAGE>

2005) or by the staff of the Commission, or as may be provided by the Commission
or its staff from time to time.

     Reinvestment Agreements: One or more reinvestment agreements, acceptable to
each of the Rating Agencies, from a bank, insurance company or other corporation
or entity (including the Trustee).

     Related Class of Upper Tier REMIC Interest: With respect to any Class of
Certificates, the interest in the Upper Tier REMIC appearing opposite such Class
in the Preliminary Statement hereto.

     Relevant Servicing Criteria: The Servicing Criteria applicable to the
various parties, as set forth on Exhibit K hereto. For clarification purposes,
multiple parties can have responsibility for the same Relevant Servicing
Criteria. With respect to a Servicing Function Participant engaged by the Master
Servicer, the Securities Administrator, the Trustee, the Custodian or a
Servicer, the term "Relevant Servicing Criteria" may refer to one or more
discrete functions specified in the Relevant Servicing Criteria applicable to
such parties.

     Relief Act: The Servicemembers Civil Relief Act, as amended.

     Relief Act Mortgage Loan: Any Mortgage Loan as to which the Monthly Payment
thereof has been reduced due to the application of the Relief Act.

     REMIC: Each pool of assets in the Trust Fund designated as a REMIC as
described in the Preliminary Statement.

     REMIC Interests: Any regular or residual interest in any of REMIC 1 or the
Upper Tier REMIC, as described in the Preliminary Statement.

     REMIC Opinion: An Opinion of Counsel to the effect that a contemplated
action will neither adversely affect the status as a REMIC of any REMIC created
hereunder nor subject any such REMIC to any tax under the REMIC Provisions.

     REMIC Provisions: The provisions of the federal income tax law relating to
real estate mortgage investment conduits, which appear at Sections 860A through
860G of Subchapter M of Chapter 1 of the Code, and related provisions, and
regulations, including proposed regulations and rulings, and administrative
pronouncements promulgated thereunder, as the foregoing may be in effect from
time to time.

     REMIC 1: As described in the Preliminary Statement.

     REMIC 1 Interest: Each class of interest in REMIC 1 as described in the
Preliminary Statement.

     REMIC 1 Regular Interest: Each of the REMIC 1 Interests other than the
Class LT1-R Interest.


                                      -32-

<PAGE>

     REMIC 1 Subordinate Balance Ratio: The ratio among the uncertificated
principal balances of each of the REMIC 1 Interests ending with the designation
"A" that is equal to the ratio among, with respect to each such REMIC 1
Interest, the excess of (x) the aggregate Stated Principal Balance of the
Mortgage Loans in the related Loan Group over (y) the aggregate Class
Certificate Balance of the Certificates in the Certificate Group related to such
Loan Group.

     REO Property: A Mortgaged Property acquired by the Servicer or Master
Servicer on behalf of the Trust Fund through foreclosure or deed-in-lieu of
foreclosure, as described in Section 3.15 in connection with a defaulted
Mortgage Loan.

     Reportable Event: As defined in Section 3.18(a).

     Reporting Servicer: As defined in Section 3.18(h).

     Repurchase Proceeds: The Repurchase Price in connection with any repurchase
of a Mortgage Loan by the Seller and any cash deposit in connection with the
substitution of a Mortgage Loan.

     Request for Release: A request for release in the form attached hereto as
Exhibit D.

     Required Insurance Policy: With respect to any Mortgage Loan, any insurance
policy which is required to be maintained from time to time under this Agreement
with respect to such Mortgage Loan.

     Reserve Account: The separate Eligible Account created and maintained by
the Securities Administrator pursuant to Section 4.06 in the name of the Trustee
for the benefit of the Trust Fund and designated "Wells Fargo Bank, N.A., as
securities administrator, in trust for registered holders of the Merrill Lynch
Mortgage Backed Securities Trust, Mortgage Pass-Through Certificates, Series
2007-1." Funds in the Reserve Account shall be held in trust for the Trust Fund
for the uses and purposes set forth in this Agreement.

     Residual Certificate: The Class A-R Certificate.

     Residual Interest: The Residual Certificate, other than the portion thereof
representing the right to payments in respect of the Class LT1-R Interest.

     Responsible Officer: Any officer assigned to the Corporate Trust Office (or
any successor thereto), including any Vice President, Assistant Vice President,
Trust Officer, any Assistant Secretary, any trust officer or any other officer
of the Trustee or Securities Administrator customarily performing functions
similar to those performed by any of the above designated officers and having
direct responsibility for the administration of this Agreement, and any other
officer of the Trustee or Securities Administrator to whom a matter arising
hereunder may be referred because of such officers familiarity with the subject
matter thereof.

     Rule 144A Letter: The certificate to be furnished by each purchaser of a
Private Certificate (which is also a Physical Certificate) which is a Qualified
Institutional Buyer as defined under Rule 144A promulgated under the Securities
Act, substantially in the form set forth as Exhibit F-3 hereto.


                                      -33-

<PAGE>

     Sarbanes-Oxley Act: The Sarbanes-Oxley Act of 2002 and the rules and
regulations of the Commission promulgated thereunder (including any
interpretations thereof by the Commission's staff).

     Sarbanes-Oxley Certification: A written certification signed by an officer
of the Master Servicer that complies with (i) the Sarbanes-Oxley Act, and (ii)
Exchange Act Rules 13a-14(d) and 15d-14(d), as in effect from time to time;
provided that if, after the Closing Date (a) the Sarbanes-Oxley Act is amended,
(b) the Rules referred to in clause (ii) are modified or superseded by any
subsequent statement, rule or regulation of the Commission or any statement of a
division thereof, or (c) any future releases, rules and regulations are
published by the Commission from time to time pursuant to the Sarbanes-Oxley
Act, which in any such case affects the form or substance of the required
certification and results in the required certification being, in the reasonable
judgment of the Master Servicer, materially more onerous that then form of the
required certification as of the Closing Date, the Sarbanes-Oxley Certification
shall be as agreed to by the Master Servicer and the Depositor following a
negotiation in good faith to determine how to comply with any such new
requirements.

     S&P: Standard and Poor's, a division of The McGraw-Hill Companies, Inc. or
its successor in interest.

     Scheduled Payment: With respect to any Mortgage Loan and any month, the
scheduled payment or payments of principal and interest due during such month on
such Mortgage Loan which either is payable by a Mortgagor in such month under
the related Mortgage Note or, in the case of REO Property, would otherwise have
been payable under the related Mortgage Note.

     Scheduled Principal: The principal portion of any Scheduled Payment.

     Securities Act: The Securities Act of 1933, as amended.

     Securities Administrator: Wells Fargo Bank, N.A., or any successor in
interest, or any successor securities administrator appointed as herein
provided.

     Security Agreement: With respect to a Cooperative Loan, the agreement
creating a security interest in favor of the originator in the related
Cooperative Stock.

     Security Instrument: A written instrument creating a valid first lien on a
Mortgaged Property securing a Mortgage Note, which may be any applicable form of
mortgage, deed of trust, deed to secure debt or security deed, including any
riders or addenda thereto.

     Seller: Merrill Lynch Mortgage Lending, Inc., a Delaware corporation, or
any successor in interest.

     Senior Accelerated Distribution Percentage: The Group I or Group II Senior
Accelerated Distribution Percentage, as applicable.

     Senior Certificates: The Class I-A-1 Certificates, Class I-A-2
Certificates, Class II-A-1 Certificates, Class II-A-2 Certificates and Class A-R
Certificates.


                                      -34-
<PAGE>

     Senior Percentage: The Group I Senior Percentage or Group II Senior
Percentage, as applicable.

     Senior Principal Distribution Amount: The Group I Senior Principal
Distribution Amount or Group II Senior Principal Distribution Amount, as
applicable.

     Servicer: With respect to each Mortgage Loan, IndyMac, PHH, Wells Fargo,
ABN AMRO, Washington Mutual, Countrywide or National City, as applicable and as
specified on the Mortgage Loan Schedule.

     Servicer Remittance Date: With respect to each Mortgage Loan, the date set
forth in the related Servicing Agreement.

     Servicing Advances: With respect to any Mortgage Loan, all customary,
reasonable and necessary "out-of-pocket" costs and expenses incurred by the
Servicer in the performance of its servicing obligations, including, but not
limited to, the cost of (i) preservation, restoration, protection and repair of
a Mortgaged Property or Cooperative Unit, as applicable, (ii) any enforcement or
judicial proceedings with respect to a Mortgage Loan, including foreclosure
actions and (iii) the management and liquidation of REO Property.

     Servicing Agreements: The IndyMac Servicing Agreement, the PHH Servicing
Agreement, the Wells Fargo Servicing Agreement, the ABN AMRO Servicing
Agreement, the Washington Mutual Servicing Agreement, the Countrywide Servicing
Agreement and the National City Servicing Agreement.

     Servicing Criteria: The "servicing criteria" set forth in Item 1122(d) of
Regulation AB, as such may be amended from time to time.

     Servicing Fee: As to any Mortgage Loan and Distribution Date, an amount
equal to the product of (i) the Stated Principal Balance of such Mortgage Loan
as of the Due Date in the preceding calendar month and (ii) the applicable
Servicing Fee Rate. Such fee shall be payable monthly, computed on the basis of
the same principal amount and period respectively which any related interest
payment on a Mortgage Loan is computed. If the Index and/or Gross Margin are
adjusted as provided in the related Mortgage Note, the Servicing Fee shall be
the rate per annum in effect immediately prior to such adjustment.

     Servicing Fee Rate: As to any Mortgage Loan, a per annum rate as set forth
in the Mortgage Loan Schedule.

     Servicing Function Participant: Any Sub-Servicer, Subcontractor or any
other Person, other than a Servicer, the Custodian, the Master Servicer, the
Paying Agent, the Securities Administrator and the Trustee, that is
participating in the servicing function within the meaning of Regulation AB.

     Servicing Officer: Any officer of the Master Servicer involved in, or
responsible for, the administration and servicing of the Mortgage Loans whose
names and specimen signatures appear on a list of servicing officers furnished
to the Trustee by the Master Servicer, as such list may be amended from time to
time.


                                      -35-

<PAGE>

     Startup Day: The Closing Date.

     Stated Principal Balance: With respect to any Mortgage Loan and Due Date,
the unpaid principal balance of such Mortgage Loan as of such Due Date, as
specified in the amortization schedule at the time relating thereto (before any
adjustment to such amortization schedule by reason of any moratorium or similar
waiver or grace period), after giving effect to any previous partial prepayments
and Liquidation Proceeds received and to the payment of principal due on such
Due date and irrespective of any delinquency in payment by the related
Mortgagor.

     Subcontractor: Any vendor, subcontractor or other Person that is not
responsible for the overall servicing of Mortgage Loans but performs one or more
discrete functions identified in Item 1122(d) of Regulation AB with respect to
Mortgage Loans under the direction or authority of any Servicer (or a
Sub-Servicer of any Servicer), the Master Servicer, the Custodian or the
Securities Administrator.

     Subordinate Certificates: The Class M-1, Class M-2, Class M-3, Class B-1,
Class B-2 and Class B-3 Certificates.

     Subordinate Net WAC: For any Distribution Date, a per annum rate equal to
the weighted average of the Loan Group I Net WAC and the Loan Group II Net WAC,
weighted in proportion to the results of subtracting from the aggregate Stated
Principal Balance of the Mortgage Loans of each Loan Group as of the beginning
of the Due Period immediately preceding such Distribution Date, the aggregate
Class Certificate Balance of the Senior Certificates related to each such Loan
Group.

     Subordinate Percentage: For any Distribution Date, the difference between
100% and the Senior Percentage for such date.

     Subordinate Prepayment Percentage: With respect to any Distribution Date
and each Class of Subordinate Certificates, under the applicable circumstances
set forth below, the respective percentages set forth below:

          (i) For any Distribution Date prior to the Distribution Date in April
     2014 (unless the Class Certificate Balances of the Senior Certificates have
     been reduced to zero), 0%.

          (ii) For any Distribution Date for which clause (i) does not apply,
     and on which any Class of Subordinate Certificates are outstanding:

               (a) in the case of the Class of Subordinate Certificates then
          outstanding with the Highest Priority and each other Class of
          Subordinate Certificates for which the related Prepayment Distribution
          Trigger has been satisfied, a fraction, expressed as a percentage, the
          numerator of which is the Class Certificate Balance of such Class
          immediately prior to such date and the denominator of which is the sum
          of the Class Certificate Balances immediately prior to such date of
          (1) the Class of Subordinate Certificates then outstanding with the
          Highest Priority and (2) all other Classes of Subordinate Certificates
          for which the respective Prepayment Distribution Triggers have been
          satisfied; and


                                      -36-

<PAGE>

               (b) in the case of each other Class of Subordinate Certificates
          for which the Prepayment Distribution Triggers have not been
          satisfied, 0%; and

          (iii) Notwithstanding the foregoing, if the application of the
     foregoing percentages on any Distribution Date as provided in Section 6.01
     of this Agreement (determined without regard to the proviso in the
     definition of "Subordinate Principal Distribution Amount") would result in
     a distribution in respect of principal of any Class or Classes of
     Subordinate Certificates in an amount greater than the remaining Class
     Certificate Balance thereof (any such class, a "Maturing Class"), then: (a)
     the Subordinate Prepayment Percentage of each Maturing Class shall be
     reduced to a level that, when applied as described above, would exactly
     reduce the Class Certificate Balance of such Class to zero; (b) the
     Subordinate Prepayment Percentage of each other Class of Subordinate
     Certificates (any such Class, a "Non-Maturing Class") shall be recalculated
     in accordance with the provisions in paragraph (ii) above, as if the Class
     Certificate Balance of each Maturing Class had been reduced to zero (such
     percentage as recalculated, the "Recalculated Percentage"); (c) the total
     amount of the reductions in the Subordinate Prepayment Percentages of the
     Maturing Class or Classes pursuant to clause (a) of this sentence,
     expressed as an aggregate percentage, shall be allocated among the
     Non-Maturing Classes in proportion to their respective Recalculated
     Percentages (the portion of such aggregate reduction so allocated to any
     Non-Maturing Class, the "Adjustment Percentage"); and (d) for purposes of
     such Distribution Date, the Subordinate Prepayment Percentage of each
     Non-Maturing Class shall be equal to the sum of (1) the Subordinate
     Prepayment Percentage thereof, calculated in accordance with the provisions
     in paragraph (ii) above as if the Class Certificate Balance of each
     Maturing Class had not been reduced to zero, plus (2) the related
     Adjustment Percentage.

     Subordinate Principal Distribution Amount: With respect to any Distribution
Date and each Class of Class M Certificates and Class B Certificates, the sum of
the following:

               (i) the product of (x) the related Class M Percentage or Class B
     Percentage for such Class and (y) the aggregate of the following amounts:

                    (1) the principal portion of each Monthly Payment due during
          the related Due Period on each Outstanding Mortgage Loan, whether or
          not received on or prior to the related Determination Date, minus the
          principal portion of any Debt Service Reduction;

                    (2) the Stated Principal Balance of any Mortgage Loan
          repurchased during the related Prepayment Period pursuant to Section
          2.02 or 2.03; and

                    (3) the principal portion of all other unscheduled
          collections (other than Principal Prepayments in Full and Curtailments
          and amounts received in connection with the liquidation or other
          disposition of a Mortgage Loan, including without limitation Insurance
          Proceeds, Liquidation Proceeds and REO Proceeds) received during the
          related Prepayment Period to the extent applied by the related
          Servicer as recoveries of principal of the related Mortgage Loan


                                      -37-

<PAGE>

          pursuant to the related Servicing Agreement;

               (ii) such Class's pro rata share, based on the Class Certificate
     Balance of each Class of Class M Certificates and Class B Certificates then
     outstanding, of, with respect to each Mortgage Loan for which a liquidation
     or other disposition occurred during the related Prepayment Period and did
     not result in any Extraordinary Losses, an amount equal to the related
     unscheduled collections (including without limitation Insurance Proceeds,
     Liquidation Proceeds and REO Proceeds) to the extent applied by the related
     Servicer as recoveries of principal of the related Mortgage Loan pursuant
     to the related Servicing Agreement, to the extent such collections are not
     otherwise distributed to the Senior Certificates;

               (iii) the product of (x) the related Subordinate Prepayment
     Percentage for such Distribution Date and (y) the aggregate of all
     Principal Prepayments in Full and Curtailments of the Mortgage Loans
     received in the related Prepayment Period, to the extent not payable to the
     Senior Certificates; and

               (iv) any amounts described in clauses (i), (ii) and (iii) as
     determined for any previous Distribution Date, that remain undistributed to
     the extent that such amounts are not attributable to Realized Losses which
     have been allocated to a Class of Subordinate Certificates;

provided, however, that such amount shall in no event exceed the outstanding
Class Certificate Balance of such Class of Certificates immediately prior to
such date.

     Subsequent Recoveries: Any amount recovered by a Servicer or the Master
Servicer (net of reimbursable expenses) with respect to a Liquidated Mortgage
Loan with respect to which a Realized Loss was incurred after the liquidation or
disposition of such Mortgage Loan.

     Sub-Servicer: Any Person that services Mortgage Loans on behalf of a
Servicer, and is responsible for the performance (whether directly or through
sub-servicers or Subcontractors) of servicing functions required to be performed
under this Agreement, any related Servicing Agreement or any sub-servicing
agreement that are identified in Item 1122(d) of Regulation AB.

     Substitute Mortgage Loan: With respect to any Mortgage Loan, which is
tendered to the Trustee pursuant to the related Servicing Agreement, the
Mortgage Loan Purchase Agreement or Section 2.04 of this Agreement, as
applicable, in each case, (i) which has an Outstanding Principal Balance not
greater nor materially less than the Mortgage Loan for which it is to be
substituted; (ii) which has a Mortgage Interest Rate and Net Rate not less than,
and not materially greater than, such Mortgage Loan; (iii) which has a maturity
date not materially earlier or later than such Mortgage Loan and not later than
the latest maturity date of any Mortgage Loan; (iv) which is of the same
property type and occupancy type as such Mortgage Loan; (v) which has a
Loan-to-Value Ratio not greater than the Loan-to-Value Ratio of such Mortgage
Loan; (vi) which is current in payment of principal and interest as of the date
of substitution; (vii) as to which the payment terms do not vary in any material
respect from the payment terms of the Mortgage Loan for which it is to be
substituted and (viii) which has a Gross Margin, Periodic Rate Cap and Maximum
Lifetime Mortgage Rate no less than those of


                                      -38-

<PAGE>

such Mortgage Loan, has the same Index and interval between Interest Adjustment
Dates as such Mortgage Loan, and a Minimum Lifetime Mortgage Rate no lower than
that of such Mortgage Loan.

     Tax Matters Person: The Securities Administrator or any successor thereto
or assignee thereof shall serve as tax administrator hereunder and as agent for
the Tax Matters Person. The Holder of the Residual Certificates shall be the Tax
Matters Person for the related REMIC, as more particularly set forth in Section
9.12 hereof.

     Transfer: Any direct or indirect transfer or sale of any Ownership Interest
in a certificate.

     Transferor Representation Letter: As defined in Section 5.02(b).

     Trustee: HSBC Bank USA, National Association, or its successor in interest,
or any successor trustee appointed as herein provided.

     Trust Fund: The corpus of the Issuing Entity created pursuant to this
Agreement, consisting of (i) the Mortgage Loans, including the right to all
payments of principal and interest received on or with respect to the Mortgage
Loans on and after the Cut-off Date (other than Scheduled Payments due on or
before such date), and all such payments due after such date but received prior
to such date and intended by the related Mortgagors to be applied after such
date; (ii) all of the Depositor's right, title and interest in and to all
amounts from time to time credited to and the proceeds of the Protected
Accounts, the Master Servicer Collection Account and the Distribution Account
established with respect to the Mortgage Loans; (iii) all of the Depositor's
rights under the Mortgage Loan Purchase Agreement, the Assignment Agreements and
the Servicing Agreements; (iv) all of the Depositor's right, title or interest
in REO Property and the proceeds thereof; (v) all of the Depositor's rights
under any Insurance Policies relating to the Mortgage Loans; and (vi) all
proceeds of the conversion, voluntary or involuntary, of any of the foregoing
into cash or other liquid assets, including without limitation, all Insurance
Proceeds, Liquidation Proceeds and condemnation awards and any proceeds of the
foregoing.

     Undercollateralized Amount: On any Distribution Date, the excess of (x) the
aggregate Class Certificate Balance of any Class or Classes of Senior
Certificates related to a Loan Group immediately prior to such Distribution Date
over (y) the aggregate Stated Principal Balance of the Mortgage Loans in its
related Loan Group as of the beginning of the related Due Period.

     Undercollateralized Senior Certificates: As defined in Section 6.01(E).

     Underlying Seller: With respect to each Mortgage Loan, ABN AMRO,
Countrywide Home Loans Inc., E-Loan, Inc., IndyMac, Market Street Mortgage
Corporation, National City, Quicken Loans Inc., Silver State Financial Services,
Inc., Wachovia Mortgage Corporation, Washington Mutual, Mortgage Access Corp.
d/b/a Weichert Financial Services and ComUnity Lending, Incorporated, as
indicated on the Mortgage Loan Schedule.

     Uninsured Cause: Any cause of damage to a Mortgaged Property or related REO
Property such that the complete restoration of such Mortgaged Property or
related REO Property is not fully reimbursable by the hazard insurance policies
required to be maintained pursuant the related Servicing Agreement, without
regard to whether or not such policy is maintained.


                                      -39-

<PAGE>

     United States Person: A citizen or resident of the United States, a
corporation or partnership (including an entity treated as a corporation or
partnership for federal income tax purposes) created or organized in, or under
the laws of, the United States or any state thereof or the District of Columbia
(except, in the case of a partnership, to the extent provided in regulations),
provided that, for purposes solely of the Class A-R Certificate, no partnership
or other entity treated as a partnership for United States federal income tax
purposes shall be treated as a United States Person unless all persons that own
an interest in such partnership either directly or through any entity that is
not a corporation for United States federal income tax purposes are United
States Persons, or an estate whose income is subject to United States federal
income tax regardless of its source, or a trust if a court within the United
States is able to exercise primary supervision over the administration of the
trust and one or more such United States Persons have the authority to control
all substantial decisions of the trust. To the extent prescribed in regulations
by the Secretary of the Treasury, which have not yet been issued, a trust which
was in existence on August 20, 1996 (other than a trust treated as owned by the
grantor under subpart E of part I of subchapter J of chapter 1 of the Code), and
which was treated as a United States person on August 20, 1996 may elect to
continue to be treated as a United States person notwithstanding the previous
sentence.

     Upper Tier REMIC: As described in the Preliminary Statement.

     Upper Tier REMIC Regular Interest: Each of the Class I-A-1 Certificates,
Class I-A-2 Certificates, Class II-A-1 Certificates, Class II-A-2 Certificates,
Class M-1 Certificates, Class M-2 Certificates, Class M-3 Certificates, Class
B-1 Certificates, Class B-2 Certificates and Class B-3 Certificates.

     Voting Rights: The portion of the voting rights of all of the Certificates
which is allocated to any Certificate. The Voting Rights allocated among Holders
of such Certificates outstanding shall be the fraction, expressed as a
percentage, the numerator of which is the aggregate Class Certificate Balance of
all the Certificates of such Class then outstanding and the denominator of which
is the aggregate Class Certificate Balance of all the Certificates then
outstanding (other than the Class A-R Certificate). 99.00% of all Voting Rights
will be allocated among all holders of the Certificates (other than the Class
A-R Certificate) in proportion to their then outstanding Class Certificate
Balances, and 1.00% of the Voting Rights shall be allocated to the Class A-R
Certificate; provided, however, that any Certificate registered in the name of
the Master Servicer, the Depositor or the Securities Administrator or any of
their respective affiliates shall not be included in the calculation of Voting
Rights. The Class P Certificates shall have no voting rights.

     Washington Mutual: Washington Mutual Bank, or any successor thereto.

     Washington Mutual Assignment Agreement: The Assignment, Assumption and
Recognition Agreement, dated as of March 1, 2007, among Washington Mutual,
Washington Mutual Mortgage Securities Corp., the Depositor and the Seller
pursuant to which the Wells Fargo Servicing Agreement and the rights of the
Seller thereunder (other than the rights to enforce the representations and
warranties with respect to the Wells Fargo Mortgage Loans) were assigned to the
Depositor for the benefit of the Certificateholders.


                                      -40-

<PAGE>

     Washington Mutual Mortgage Loans: The Mortgage Loans serviced by Washington
Mutual pursuant to the Washington Mutual Servicing Agreement.

     Washington Mutual Servicing Agreement: The Servicing Agreement, dated as of
November 1, 2005, between Washington Mutual and the Seller, as amended.

     Wells Fargo: Wells Fargo Bank, N.A., or any successor thereto.

     Wells Fargo Assignment Agreement: The Assignment, Assumption and
Recognition Agreement, dated as of March 1, 2007, among Wells Fargo, the
Depositor and the Seller pursuant to which the Wells Fargo Servicing Agreement
and the rights of the Seller thereunder (other than the rights to enforce the
representations and warranties with respect to the Wells Fargo Mortgage Loans)
were assigned to the Depositor for the benefit of the Certificateholders.

     Wells Fargo Mortgage Loans: The Mortgage Loans serviced by Wells Fargo
pursuant to the Wells Fargo Servicing Agreement.

     Wells Fargo Servicing Agreement: The Seller's Warranties and Servicing
Agreement (WFHM Mortgage Loans Series 2006-W90), dated as of November 1, 2006,
between Merrill Lynch Bank, USA and Wells Fargo.

     Section 1.02 Accounting.

     Unless otherwise specified herein, for the purpose of any definition or
calculation, whenever amounts are required to be netted, subtracted or added or
any distributions are taken into account such definition or calculation and any
related definitions or calculations shall be determined without duplication of
such functions.

                                   ARTICLE II
                             CONVEYANCE OF MORTGAGE
                    LOANS; ORIGINAL ISSUANCE OF CERTIFICATES

     Section 2.01 Conveyance of Mortgage Loans to Trustee.

     (a) The Depositor concurrently with the execution and delivery of this
Agreement, sells, transfers and assigns to the Issuing Entity without recourse
all its right, title and interest in and to (i) the Mortgage Loans identified in
the Mortgage Loan Schedule, including all interest and principal due with
respect to the Mortgage Loans after the Cut-off Date, but excluding any payments
of principal and interest due on or prior to the Cut-off Date; (ii) such assets
as shall from time to time be credited or are required by the terms of this
Agreement to be credited to the Master Servicer Collection Account, (iii) such
assets relating to the Mortgage Loans as from time to time may be held by the
Servicers in Protected Accounts, the Master Servicer in the Master Servicer
Collection Account and the Securities Administrator in the Distribution Account
for the benefit of the Trustee on behalf of the Certificateholders, (iv) any REO
Property, (v) the Required Insurance Policies and any amounts paid or payable by
the insurer under any Insurance Policy (to the extent the mortgagee has a claim
thereto), (vi) the Mortgage Loan Purchase Agreement to the extent provided in
Subsection 2.03(a), (vii) the rights with respect to the Servicing Agreements as
assigned to the Depositor on behalf of the Certificateholders by the


                                      -41-

<PAGE>

Assignment Agreements and (viii) any proceeds of the foregoing. Although it is
the intent of the parties to this Agreement that the conveyance of the
Depositor's right, title and interest in and to the Mortgage Loans and other
assets in the Trust Fund pursuant to this Agreement shall constitute a purchase
and sale and not a loan, in the event that such conveyance is deemed to be a
loan, it is the intent of the parties to this Agreement that the Depositor shall
be deemed to have granted to the Trustee a first priority perfected security
interest in all of the Depositor's right, title and interest in, to and under
the Mortgage Loans and other assets in the Trust Fund, and that this Agreement
shall constitute a security agreement under applicable law.

     (b) In connection with the above transfer and assignment, the Depositor
hereby deposits with the Trustee or the Custodian, as its agent, the following
documents or instruments

     (I) with respect to each Mortgage Loan, other than a Cooperative Loan:

          (i) the original Mortgage Note, endorsed in the following form: "Pay
     to the order of HSBC Bank USA, National Association, as Trustee for the
     registered holders of the Merrill Lynch Mortgage Backed Securities Trust,
     Series 2007-1 Mortgage Pass-Through Certificates, without recourse," with
     all prior and intervening endorsements showing a complete chain of
     endorsement from the originator to the Person so endorsing to the Trustee;

          (ii) the original recorded Mortgage or a copy of the Mortgage
     certified by the public recording office in which such Mortgage has been
     recorded;

          (iii) an original Assignment of the Mortgage executed in the following
     form: "HSBC Bank USA, National Association, as Trustee for the registered
     holders of the Merrill Lynch Mortgage Backed Securities Trust, Series
     2007-1, Mortgage Pass-Through Certificates.

          (iv) the original recorded Assignment or Assignments of the Mortgage
     showing a complete chain of assignment from the originator to the Person
     assigning the Mortgage to the Trustee as contemplated by the immediately
     preceding clause (iii), if applicable and only to the extent available to
     the Depositor with evidence of recording thereon;

          (v) the originals of all assumption, modification, consolidation or
     extension agreements, with evidence of recording thereon, if any;

          (vi) the original of any guarantee executed in connection with the
     Mortgage Note;

          (vii) the original mortgagee title insurance policy;

          (viii) the original of any security agreement, chattel mortgage or
     equivalent document executed in connection with the Mortgage; and

          (ix) the original power of attorney, if applicable.


                                      -42-

<PAGE>

and (II) with respect to each Mortgage Loan that is a Cooperative Loan:

          (x) the original Mortgage Note, endorsed in the following form: "Pay
     to the order of HSBC Bank USA, National Association, as Trustee for the
     registered holders of the Merrill Lynch Mortgage Backed Securities Trust,
     Series 2007-1 Mortgage Pass-Through Certificates, without recourse," with
     all prior and intervening endorsements showing a complete chain of
     endorsement from the originator to the Person so endorsing to the Trustee;

          (xi) the original duly executed assignment of Security Agreement to
     the Trustee;

          (xii) the acknowledgment copy of the original executed Form UCC-1 (or
     certified copy thereof) with respect to the Security Agreement, and any
     required continuation statements;

          (xiii) the acknowledgment copy of the original executed Form UCC-3
     with respect to the Security Agreement, indicating the Trustee as the
     assignee of the secured party;

          (xiv) the stock certificate representing the Cooperative Assets
     allocated to the cooperative unit, with a stock power in blank attached;

          (xv) the original collateral assignment of the proprietary lease by
     Mortgagor to the originator;

          (xvi) a copy of the recognition agreement;

          (xvii) if applicable and to the extent available, the original
     intervening assignments, including warehousing assignments, if any,
     showing, to the extent available, an unbroken chain of the related Mortgage
     Loan to the Trustee, together with a copy of the related Form UCC-3 with
     evidence of filing thereon; and

          (xviii) the originals of each assumption, modification or substitution
     agreement, if any, relating to the Mortgage Loan;

provided, however, that in lieu of the foregoing, the Depositor may deliver the
following documents, under the circumstances set forth below: (w) the Depositor
may deliver a Mortgage Note pursuant to (a)(i) and (b)(i) endorsed in blank,
provided that the endorsement is completed within 60 days of the Closing Date;
(x) in lieu of the original Mortgage, assignments to the Trustee or its
Custodian, as applicable, or intervening assignments thereof which have been
delivered, are being delivered or will, upon receipt of recording information
relating to the Mortgage required to be included thereon, be delivered to
recording offices for recording and have not been returned to the Depositor in
time to permit their delivery as specified above, the Depositor may deliver a
true copy thereof with a certification by the Depositor on the face of such
copy, substantially as follows: "Certified to be a true and correct copy of the
original, which has been transmitted for recording"; and (y) in lieu of the
Mortgage, assignment to the Trustee or intervening assignments thereof, if the
applicable jurisdiction retains the originals of such


                                      -43-

<PAGE>

documents (as evidenced by a certification from the Depositor or the Master
Servicer, to such effect) the Depositor may deliver photocopies of such
documents containing an original certification by the judicial or other
governmental authority of the jurisdiction where such documents were recorded;
and provided, further, however, that in the case of Mortgage Loans which have
been prepaid in full after the Cut-off Date and prior to the Closing Date, the
Depositor, in lieu of delivering the above documents, may deliver to the Trustee
or its Custodian, as applicable, a certification to such effect and shall
deposit all amounts paid in respect of such Mortgage Loans in the Distribution
Account on the Closing Date. The Depositor shall deliver such original documents
(including any original documents as to which certified copies had previously
been delivered) to the Trustee or its Custodian, as applicable, promptly after
they are received. As of the date hereof, recordation of the assignment of the
Mortgage Loans to the Trustee or the Custodian, as applicable, is not required
in any state by either Rating Agency to obtain the initial rating on the
Certificates (upon which statement the Master Servicer, the Trustee and the
Custodian may each conclusively rely).

     If any original Mortgage Note referred to in Section 2.01(b)(I)(i) or
2.01(b)(II)(i) above cannot be located, the obligations of the Depositor to
deliver such documents shall be deemed to be satisfied upon delivery to the
Trustee or its Custodian, as applicable, of a photocopy of such Mortgage Note,
if available, with a lost note affidavit. If any of the original Mortgage Notes
for which a lost note affidavit was delivered to the Trustee or its Custodian,
as applicable, is subsequently located, such original Mortgage Note shall be
delivered to the Trustee or its Custodian, as applicable, within three Business
Days.

     (c) The parties hereto agree that it is not intended that any mortgage loan
be included in the Trust Fund that is, without limitation, a "High Cost Loan" as
defined by the Home Ownership and Equity Protection Act of 1994 or any other
applicable anti-predatory lending laws, including but not limited to (i) a
"High-Cost Home Loan" as defined in the New Jersey Home Ownership Act effective
November 27, 2003, (ii) a "High-Cost Home Loan" as defined in the New Mexico
Home Loan Protection Act effective January 1, 2004, (iii) a "High Cost Home
Mortgage Loan" as defined in the Massachusetts Predatory Home Loan Practices Act
effective November 7, 2004 or (iv) a "High-Cost Home Loan" as defined by the
Indiana High Cost Home Loan Law effective January 1, 2005.

     (d) Notwithstanding anything to the contrary contained herein, the parties
hereto acknowledge that the functions of the Trustee with respect to the
custody, acceptance, inspection and release of Mortgage Files, including but not
limited to certain insurance policies and documents contemplated by Section 3.12
of this Agreement, and preparation and delivery of the certifications shall be
performed by the Custodian(s) pursuant to the terms and conditions of the
Custodial Agreement(s).

     Section 2.02 Acceptance of Mortgage Loans by Trustee.

     (a) The Trustee acknowledges the sale, transfer and assignment of the Trust
Fund to it by the Depositor and its receipt thereof, subject to further review
and the exceptions which may be noted pursuant to the procedures described
below, and declares that it, or the Custodian on its behalf, holds the documents
(or certified copies thereof) delivered to it pursuant to Section 2.01, and
declares that it will continue to hold those documents and any amendments,


                                      -44-

<PAGE>

replacements or supplements thereto and all other assets of the Trust Fund
delivered to it as Trustee in trust for the use and benefit of all present and
future Holders of the Certificates. On or before the Closing Date (or, with
respect to any Substitute Mortgage Loan, within five Business Days after the
receipt by the Trustee or Custodian thereof), the Trustee agrees, for the
benefit of the Certificateholders, to review or cause to be reviewed by the
Custodian on its behalf (under the Custodial Agreement), each Mortgage File
delivered to it and to execute and deliver, or cause to be executed and
delivered, to the Depositor on the Closing Date an Initial Certification. In
conducting such review, the Trustee or Custodian will certify as to each
Mortgage Loan listed in the Mortgage Loan Schedule (other than any Mortgage Loan
paid in full or any Mortgage Loan specifically identified in the exception
report annexed thereto as not being covered by such certification), (i) all
documents constituting part of such Mortgage File (other than such documents
described in Section 2.01(b)(I)(iii)) required to be delivered to it pursuant to
this Agreement are in its possession, provided that with respect to the
documents described in Section 2.01(b)(I)(v), (vi), (viii) and (ix) and
2.01(b)(II)(viii) and (ix) to the extent the Trustee or the Custodian on its
behalf has actual knowledge that such documents exist, (ii) such documents have
been reviewed by it and are not torn, mutilated, defaced or otherwise altered
(except if initialed by the obligor) and appear to relate on their face to such
Mortgage Loan, (iii) based on its examination and only as to the foregoing, the
information set forth in the Mortgage Loan Schedule corresponding to the loan
number for the Mortgage Loan, the Mortgagor's name, including the street address
but excluding the zip code, the Mortgage Interest Rate and the original
principal balance of the Mortgage Loan accurately reflects information set forth
in the Mortgage File and (iv) with respect to Mortgage Loans with a Mortgage
Interest Rate subject to adjustment, the Gross Margin, the lifetime cap and the
periodic cap for such Mortgage Loan. In performing any such review, the Trustee,
or the Custodian, as its agent, may conclusively rely on the purported due
execution and genuineness of any such document and on the purported genuineness
of any signature thereon. Notwithstanding anything to the contrary in this
Agreement, it is herein acknowledged that, in conducting such review, the
Trustee or the Custodian on its behalf is under no duty or obligation to
inspect, review or examine any such documents, instruments, certificates or
other papers to determine whether they are genuine, enforceable, or appropriate
for the represented purpose or whether they have actually been recorded or that
they are other than what they purport to be on their face, or to determine
whether any Person executing any documents is authorized to do so or whether any
signature is genuine. If the Trustee or the Custodian, as its agent, finds any
document constituting part of the Mortgage File not to have been executed or
received, or to be unrelated to the Mortgage Loans identified in Exhibit B or to
appear to be defective on its face, the Trustee or the Custodian, as its agent,
shall promptly notify the Seller.

     In accordance with the Mortgage Loan Purchase Agreement, the Seller shall
correct or cure any such defect within ninety (90) days from the date of notice
from the Trustee or the Custodian, as its agent, of the defect and if the Seller
fails to correct or cure the defect within such period, and such defect
materially and adversely affects the interests of the Certificateholders in the
related Mortgage Loan, the Trustee, shall enforce the Seller's obligation
pursuant to the Mortgage Loan Purchase Agreement, within 90 days from the
Trustee's or the Custodian's notification, to purchase such Mortgage Loan at the
Purchase Price; provided that, if such defect would cause the Mortgage Loan to
be other than a "qualified mortgage" as defined in Section 860G(a)(3) of the
Code, any such cure or repurchase must occur within 90 days from the date such
breach was discovered; provided, however, that if such defect relates solely to
the


                                      -45-

<PAGE>

inability of the Seller to deliver the original Security Instrument or
intervening assignments thereof, or a certified copy because the originals of
such documents, or a certified copy have not been returned by the applicable
jurisdiction, the Seller shall not be required to purchase such Mortgage Loan if
the Seller delivers such original documents or certified copy promptly upon
receipt, but in no event later than 360 days after the Closing Date. The
foregoing repurchase obligation shall not apply in the event that the Seller
cannot deliver such original or copy of any document submitted for recording to
the appropriate recording office in the applicable jurisdiction because such
document has not been returned by such office; provided that the Seller shall
instead deliver a recording receipt of such recording office or, if such receipt
is not available, a certificate confirming that such documents have been
accepted for recording, and delivery to the Trustee or the Custodian, as its
agent, shall be effected by the Seller within thirty days of its receipt of the
original recorded document.

     (b) No later than 180 days after the Closing Date, the Trustee or the
Custodian, as its agent, will review, for the benefit of the Certificateholders,
the Mortgage Files delivered to it and will execute and deliver or cause to be
executed and delivered to the Depositor a Final Certification. In conducting
such review, the Trustee or the Custodian, as its agent, will certify as to each
Mortgage Loan listed in the Mortgage Loan Schedule (other than any Mortgage Loan
paid in full or any Mortgage Loan specifically identified in the exception
report annexed thereto as not being covered by such certification), that (i) all
documents constituting part of such Mortgage File (other than such documents
described in Section 2.01(b)(I)(v) and (ix)) required to be delivered to it
pursuant to this Agreement are in its possession, provided that with respect to
the documents described in Section 2.01(b)(I)(v), (vi), (viii) and (ix) and
2.01(b)(II)(viii) and (ix) to the extent the Trustee or the Custodian on its
behalf has actual knowledge that such documents exist, (ii) such documents have
been reviewed by it and are not torn, mutilated, defaced or otherwise altered
(except if initialed by the obligor) and appear regular on their face and relate
to such Mortgage Loan, (iii) based on its examination and only as to the
foregoing, the information set forth in the Mortgage Loan Schedule corresponding
to the loan number for the Mortgage Loan, the Mortgagor's name, including the
street address but excluding the zip code, the Mortgage Interest Rate and the
original principal balance of the Mortgage Loan accurately reflects information
set forth in the Mortgage File. In performing any such review, the Trustee, or
the Custodian, as its agent, may conclusively rely on the purported due
execution and genuineness of any such document and on the purported genuineness
of any signature thereon. Notwithstanding anything to the contrary in this
Agreement, it is herein acknowledged that, in conducting such review, the
Trustee or the Custodian on its behalf is under no duty or obligation (i) to
inspect, review or examine any such documents, instruments, certificates or
other papers to determine whether they are genuine, enforceable, or appropriate
for the represented purpose or whether they have actually been recorded or that
they are other than what they purport to be on their face, or to determine
whether any Person executing any documents is authorized to do so or whether any
signature is genuine. If the Trustee or the Custodian, as its agent, finds any
document constituting part of the Mortgage File not to have been executed or
received, or to be unrelated to the Mortgage Loans identified in Exhibit B or to
appear to be defective on its face, the Trustee or the Custodian, as its agent,
shall promptly notify the Seller. In accordance with the Mortgage Loan Purchase
Agreement, the Seller shall correct or cure any such defect within 90 days from
the date of notice from the Trustee of the defect and if the Seller is unable to
cure such defect within such period, and if such defect materially and adversely
affects the interests of the Certificateholders in the related Mortgage Loan,
the Trustee shall enforce the Seller's


                                      -46-

<PAGE>

obligation under the Mortgage Loan Purchase Agreement to purchase such Mortgage
Loan at the Purchase Price, provided, however, that if such defect relates
solely to the inability of the Seller to deliver the original Security
Instrument or intervening assignments thereof, or a certified copy, because the
originals of such documents, or a certified copy, have not been returned by the
applicable jurisdiction, the Seller shall not be required to purchase such
Mortgage Loan, if the Seller delivers such original documents or certified copy
promptly upon receipt, but in no event later than 360 days after the Closing
Date.

     (c) In the event that a Mortgage Loan is purchased by the Seller in
accordance with Subsections 2.02(a) or (b) above, the Seller shall remit to the
Master Servicer the Purchase Price for deposit in the Master Servicer Collection
Account and the Seller shall provide to the Trustee written notification
detailing the components of the Purchase Price. Upon deposit of the Purchase
Price in the Master Servicer Collection Account, the Depositor shall give
written notice thereof to the Trustee and the Custodian and the Trustee or the
Custodian, as its agent (upon receipt of a Request for Release in the form of
Exhibit D attached hereto with respect to such Mortgage Loan), shall release to
the Seller the related Mortgage File and the Trustee shall execute and deliver
all instruments of transfer or assignment, without recourse, furnished to it by
the Seller as are necessary to vest in the Seller title to and rights under the
Mortgage Loan. Such purchase shall be deemed to have occurred on the date on
which the Purchase Price in available funds is received by the Trustee. The
Depositor or Master Servicer shall amend the Mortgage Loan Schedule, to reflect
such repurchase and shall promptly notify the Rating Agencies and the Master
Servicer of such amendment. The obligation of the Seller to repurchase any
Mortgage Loan as to which such a defect in a constituent document exists shall
be the sole remedy respecting such defect available to the Certificateholders or
to the Trustee on their behalf.

     Section 2.03 Assignment of Interest in the Mortgage Loan Purchase
Agreement.

     (a) The Depositor hereby assigns to the Trustee, on behalf of the
Certificateholders, all of its right, title and interest in the Mortgage Loan
Purchase Agreement, including but not limited to Depositor's rights pursuant to
the Servicing Agreements (noting that the Seller has retained the right in the
event of breach of the representations, warranties and covenants, if any, with
respect to the related Mortgage Loans of the related Servicer under the related
Servicing Agreement to enforce the provisions thereof and to seek all or any
available remedies). The obligations of the Seller to substitute or repurchase,
as applicable, a Mortgage Loan shall be the Trustee's and the
Certificateholders' sole remedy for any breach thereof. At the request of the
Trustee, the Depositor shall take such actions as may be necessary to enforce
the above right, title and interest on behalf of the Trustee and the
Certificateholders or shall execute such further documents as the Trustee may
reasonably require in order to enable the Trustee to carry out such enforcement.
With respect to the representations and warranties described in the Mortgage
Loan Purchase Agreement that are made to the best of the Seller's knowledge, if
it is discovered by any of the Depositor, the Seller, the Master Servicer, the
Securities Administrator or the Trustee that the substance of such
representation and warranty is inaccurate and such inaccuracy materially and
adversely affects the value of the related Mortgage Loan, then notwithstanding
the Seller's lack of knowledge with respect to the substance of such
representation and warranty, such inaccuracy shall be deemed a breach of the
applicable representation or warranty.


                                      -47-

<PAGE>

     (b) If the Depositor, the Master Servicer, Securities Administrator or the
Trustee discovers a breach of any of the representations and warranties set
forth in the Mortgage Loan Purchase Agreement, which breach materially and
adversely affects the value of the interests of Certificateholders or the
Trustee in the related Mortgage Loan, the party discovering the breach shall
give prompt written notice of the breach to the other parties. The Seller,
within 90 days of its discovery or receipt of notice that such breach has
occurred (whichever occurs earlier), shall cure the breach in all material
respects or, subject to the Mortgage Loan Purchase Agreement or Section 2.04 of
this Agreement, as applicable, shall purchase the Mortgage Loan or any property
acquired with respect thereto from the Trustee; provided, however, that if there
is a breach of any representation set forth in the Mortgage Loan Purchase
Agreement or Section 2.04 of this Agreement, as applicable, and the Mortgage
Loan or the related property acquired with respect thereto has been sold, then
the Seller shall pay, in lieu of the Purchase Price, any excess of the Purchase
Price over the Net Liquidation Proceeds received upon such sale. (If the Net
Liquidation Proceeds exceed the Purchase Price, any excess shall be paid to the
Seller to the extent not required by law to be paid to the borrower.) Any such
purchase by the Seller shall be made by providing an amount equal to the
Purchase Price to the Master Servicer for deposit in the Master Servicer
Collection Account and written notification detailing the components of such
Purchase Price. The Depositor shall notify the Trustee in writing of the deposit
of the Purchase Price and submit to the Trustee or the Custodian, as its agent,
a Request for Release, and the Trustee shall release, or the Trustee shall cause
the Custodian to release, to the Seller the related Mortgage File and the
Trustee shall execute and deliver all instruments of transfer or assignment
furnished to it by the Seller, without recourse, as are necessary to vest in the
Seller title to and rights under the Mortgage Loan or any property acquired with
respect thereto. Such purchase shall be deemed to have occurred on the date on
which the Purchase Price in available funds is received by the Master Servicer.
The Depositor or the Master Servicer shall amend the Mortgage Loan Schedule to
reflect such repurchase and shall promptly notify the Master Servicer and the
Rating Agencies of such amendment. Enforcement of the obligation of the Seller
to purchase (or substitute a Substitute Mortgage Loan for) any Mortgage Loan or
any property acquired with respect thereto (or pay the Purchase Price as set
forth in the above proviso) as to which a breach has occurred and is continuing
shall constitute the sole remedy respecting such breach available to the
Certificateholders or the Trustee on their behalf.

     Section 2.04 Substitution of Mortgage Loans. Notwithstanding anything to
the contrary in this Agreement, in lieu of purchasing a Mortgage Loan pursuant
to the Mortgage Loan Purchase Agreement or Sections 2.02 or 2.03 of this
Agreement, the Seller may, no later than the date by which such purchase by the
Seller would otherwise be required, tender to the Trustee a Substitute Mortgage
Loan accompanied by a certificate of an authorized officer of the Seller that
such Substitute Mortgage Loan conforms to the requirements set forth in the
definition of "Substitute Mortgage Loan" in the Mortgage Loan Purchase Agreement
or this Agreement, as applicable; provided, however, that substitution pursuant
to the Mortgage Loan Purchase Agreement or Section 2.04 of this Agreement, as
applicable, in lieu of purchase shall not be permitted after the termination of
the two-year period beginning on the Startup Day; provided, further, that if the
breach would cause the Mortgage Loan to be other than a "qualified mortgage" as
defined in Section 860G(a)(3) of the Code, any such cure or substitution must
occur within 90 days from the date the breach was discovered. The Trustee or the
Custodian, as its agent, shall examine the Mortgage File for any Substitute
Mortgage Loan in the manner set forth in Section 2.02(a) and the Trustee or the
Custodian, as its agent, shall notify the Seller, in


                                      -48-

<PAGE>

writing, within five Business Days after receipt, whether or not the documents
relating to the Substitute Mortgage Loan satisfy the requirements of the fourth
sentence of Subsection 2.02(a). Within two Business Days after such
notification, the Seller shall provide to the Securities Administrator for
deposit in the Distribution Account the amount, if any, by which the Outstanding
Principal Balance as of the next preceding Due Date of the Mortgage Loan for
which substitution is being made, after giving effect to Scheduled Principal due
on such date, exceeds the Outstanding Principal Balance as of such date of the
Substitute Mortgage Loan, after giving effect to Scheduled Principal due on such
date, which amount shall be treated for the purposes of this Agreement as if it
were the payment by the Seller of the Purchase Price for the purchase of a
Mortgage Loan by the Seller. After such notification to the Seller and, if any
such excess exists, upon written notification of the receipt of such deposit,
the Trustee shall accept such Substitute Mortgage Loan which shall thereafter be
deemed to be a Mortgage Loan hereunder. In the event of such a substitution,
accrued interest on the Substitute Mortgage Loan for the month in which the
substitution occurs and any Principal Prepayments made thereon during such month
shall be the property of the Issuing Entity and accrued interest for such month
on the Mortgage Loan for which the substitution is made and any Principal
Prepayments made thereon during such month shall be the property of the Seller.
The Scheduled Principal on a Substitute Mortgage Loan due on the Due Date in the
month of substitution shall be the property of the Seller and the Scheduled
Principal on the Mortgage Loan for which the substitution is made due on such
Due Date shall be the property of the Issuing Entity. Upon acceptance of the
Substitute Mortgage Loan (and delivery to the Trustee or Custodian of a Request
for Release for such Mortgage Loan), the Trustee shall release to the Seller the
related Mortgage File related to any Mortgage Loan released pursuant to the
Mortgage Loan Purchase Agreement or Section 2.04 of this Agreement, as
applicable, and shall execute and deliver all instruments of transfer or
assignment, without recourse, in form as provided to it as are necessary to vest
in the Seller title to and rights under any Mortgage Loan released pursuant to
the Mortgage Loan Purchase Agreement or Section 2.04 of this Agreement, as
applicable. The Seller shall deliver the documents related to the Substitute
Mortgage Loan in accordance with the provisions of the Mortgage Loan Purchase
Agreement or Subsections 2.01(b) and 2.02(b) of this Agreement, as applicable,
with the date of acceptance of the Substitute Mortgage Loan deemed to be the
Closing Date for purposes of the time periods set forth in those Subsections.
The representations and warranties set forth in the Mortgage Loan Purchase
Agreement shall be deemed to have been made by the Seller with respect to each
Substitute Mortgage Loan as of the date of acceptance of such Mortgage Loan by
the Trustee. The Master Servicer shall amend the Mortgage Loan Schedule to
reflect such substitution and shall provide a copy of such amended Mortgage Loan
Schedule to the Trustee and the Rating Agencies.

     Notwithstanding any other provision of this Agreement, the right to
substitute Mortgage Loans pursuant to this Article II shall be subject to the
additional limitations that no substitution of a Mortgage Loan shall be made
unless the Securities Administrator and the Trustee shall have received an
Opinion of Counsel (at the expense of the party seeking to make the
substitution) that, under current law, such substitution will not (A) affect
adversely the status of any REMIC established hereunder as a REMIC, or of the
related "regular interests" as "regular interests" in any such REMIC, or (B)
cause any such REMIC to engage in a "prohibited transaction" or prohibited
contribution pursuant to the REMIC provisions.


                                      -49-

<PAGE>

     Section 2.05 Issuance of Certificates. The Trustee acknowledges the
assignment to it on behalf of the Issuing Entity of the Mortgage Loans and the
other assets comprising the Trust Fund and, concurrently therewith, the
Securities Administrator has signed, and countersigned and delivered to the
Depositor, in exchange therefor, Certificates in such authorized denominations
representing such Percentage Interests as the Depositor has requested. The
Trustee agrees that it will hold the Mortgage Loans and such other assets as may
from time to time be delivered to it segregated on the books of the Trustee in
trust for the benefit of the Certificateholders.

     Section 2.06 Representations and Warranties Concerning the Depositor. The
Depositor hereby represents and warrants to the Trustee, the Master Servicer and
the Securities Administrator as follows:

          (i) the Depositor (a) is a corporation duly organized, validly
     existing and in good standing under the laws of the State of Delaware and
     (b) is qualified and in good standing as a foreign corporation to do
     business in each jurisdiction where such qualification is necessary, except
     where the failure so to qualify would not reasonably be expected to have a
     material adverse effect on the Depositor's business as presently conducted
     or on the Depositor's ability to enter into this Agreement and to
     consummate the transactions contemplated hereby;

          (ii) the Depositor has full corporate power to own its property, to
     carry on its business as presently conducted and to enter into and perform
     its obligations under this Agreement;

          (iii) the execution and delivery by the Depositor of this Agreement
     have been duly authorized by all necessary corporate action on the part of
     the Depositor; and neither the execution and delivery of this Agreement,
     nor the consummation of the transactions herein contemplated, nor
     compliance with the provisions hereof, will conflict with or result in a
     breach of, or constitute a default under, any of the provisions of any law,
     governmental rule, regulation, judgment, decree or order binding on the
     Depositor or its properties or the articles of incorporation or by-laws of
     the Depositor, except those conflicts, breaches or defaults which would not
     reasonably be expected to have a material adverse effect on the Depositor's
     ability to enter into this Agreement and to consummate the transactions
     contemplated hereby;

          (iv) the execution, delivery and performance by the Depositor of this
     Agreement and the consummation of the transactions contemplated hereby do
     not require the consent or approval of, the giving of notice to, the
     registration with, or the taking of any other action in respect of, any
     state, federal or other governmental authority or agency, except those
     consents, approvals, notices, registrations or other actions as have
     already been obtained, given or made;

          (v) this Agreement has been duly executed and delivered by the
     Depositor and, assuming due authorization, execution and delivery by the
     other parties hereto, constitutes a valid and binding obligation of the
     Depositor enforceable against it in


                                      -50-

<PAGE>

     accordance with its terms (subject to applicable bankruptcy and insolvency
     laws and other similar laws affecting the enforcement of the rights of
     creditors generally);

          (vi) there are no actions, suits or proceedings pending or, to the
     knowledge of the Depositor, threatened against the Depositor, before or by
     any court, administrative agency, arbitrator or governmental body (i) with
     respect to any of the transactions contemplated by this Agreement or (ii)
     with respect to any other matter which in the judgment of the Depositor
     will be determined adversely to the Depositor and will if determined
     adversely to the Depositor materially and adversely affect the Depositor's
     ability to enter into this Agreement or perform its obligations under this
     Agreement; and the Depositor is not in default with respect to any order of
     any court, administrative agency, arbitrator or governmental body so as to
     materially and adversely affect the transactions contemplated by this
     Agreement; and

          (vii) immediately prior to the transfer and assignment to the Trustee,
     each Mortgage Note and each Mortgage were not subject to an assignment or
     pledge, and the Depositor had good and marketable title to and was the sole
     owner thereof and had full right to transfer and sell such Mortgage Loan to
     the Trustee free and clear of any encumbrance, equity, lien, pledge,
     charge, claim or security interest.

     Section 2.07 Representations and Warranties Concerning the Master Servicer
and Securities Administrator. Wells Fargo Bank, N.A., in its capacity as Master
Servicer and Securities Administrator hereby represents and warrants to the
Seller, the Depositor and the Trustee as follows, as of the Closing Date:

          (i) It is a national banking association duly formed, validly existing
     and in good standing under the laws of the United States of America and is
     duly authorized and qualified to transact any and all business contemplated
     by this Agreement to be conducted by the Master Servicer and the Securities
     Administrator, to the extent necessary to ensure its ability to master
     service the Mortgage Loans in accordance with the terms of this Agreement
     and to perform any of its other obligations under this Agreement in
     accordance with the terms hereof;

          (ii) It has the full corporate power and authority to execute, deliver
     and perform, and to enter into and consummate the transactions contemplated
     by this Agreement and has duly authorized by all necessary corporate action
     on its part the execution, delivery and performance of this Agreement; and
     this Agreement, assuming the due authorization, execution and delivery
     hereof by the other parties hereto, constitutes its legal, valid and
     binding obligation, enforceable against it in accordance with its terms,
     except that (a) the enforceability hereof may be limited by bankruptcy,
     insolvency, moratorium, receivership and other similar laws relating to
     creditors' rights generally and (b) the remedy of specific performance and
     injunctive and other forms of equitable relief may be subject to equitable
     defenses and to the discretion of the court before which any proceeding
     therefor may be brought.

          (iii) The execution and delivery of this Agreement by it, the
     consummation of any other of the transactions contemplated by this
     Agreement, and the fulfillment of or


                                      -51-

<PAGE>

     compliance with the terms hereof are in its ordinary course of business and
     will not (A) result in a material breach of any term or provision of its
     charter or by-laws or (B) materially conflict with, result in a material
     breach, violation or acceleration of, or result in a material default
     under, the terms of any other material agreement or instrument to which it
     is a party or by which it may be bound, or (C) constitute a material
     violation of any statute, order or regulation applicable to it of any
     court, regulatory body, administrative agency or governmental body having
     jurisdiction over it; and it is not in breach or violation of any material
     indenture or other material agreement or instrument, or in violation of any
     statute, order or regulation of any court, regulatory body, administrative
     agency or governmental body having jurisdiction over it which breach or
     violation may materially impair its ability to perform or meet any of its
     obligations under this Agreement.

          (iv) No litigation is pending or, to the best of its knowledge,
     threatened, against it that would materially and adversely affect the
     execution, delivery or enforceability of this Agreement or its ability to
     perform any of its other obligations under this Agreement in accordance
     with the terms hereof.

          (v) No consent, approval, authorization or order of any court or
     governmental agency or body is required for its execution, delivery and
     performance of, or compliance with, this Agreement or the consummation of
     the transactions contemplated hereby, or if any such consent, approval,
     authorization or order is required, it has obtained the same.

                                  ARTICLE III
                 ADMINISTRATION AND SERVICING OF MORTGAGE LOANS

     Section 3.01 Master Servicer. The Master Servicer shall supervise, monitor
and oversee the obligation of the Servicers to service and administer their
respective Mortgage Loans in accordance with the terms of the applicable
Servicing Agreement and shall have full power and authority to do any and all
things which it may deem necessary or desirable in connection with such master
servicing and administration. In performing its obligations hereunder, the
Master Servicer shall act in a manner consistent with Accepted Master Servicing
Practices. Furthermore, the Master Servicer shall oversee and consult with each
Servicer as necessary from time-to-time to carry out the Master Servicer's
obligations hereunder, shall receive, review and evaluate all reports,
information and other data provided to the Master Servicer by each Servicer and
shall cause each Servicer to perform and observe the covenants, obligations and
conditions to be performed or observed by such Servicer under the applicable
Servicing Agreement. The Master Servicer shall independently and separately
monitor each Servicer's servicing activities with respect to each related
Mortgage Loan, reconcile the results of such monitoring with such information
provided in the previous sentence on a monthly basis and coordinate corrective
adjustments to the Servicers' and Master Servicer's records, and based on such
reconciled and corrected information, the Master Servicer shall provide such
information to the Securities Administrator as shall be necessary in order for
it to prepare the statements specified in Section 6.04, and prepare any other
information and statements required to be forwarded by the Master Servicer
hereunder. The Master Servicer shall reconcile the results of its monitoring
with the actual remittances of the Servicers to the Master Servicer Collection
Account pursuant to the applicable Servicing Agreements.


                                      -52-

<PAGE>

     If the Master Servicer and the Securities Administrator are the same
entity, then at any time the Master Servicer is terminated as Master Servicer,
the Securities Administrator shall likewise be removed as securities
administrator.

     The Trustee shall furnish the Servicers and the Master Servicer with any
limited powers of attorney and other documents in form acceptable to it
necessary or appropriate to enable the Servicers and the Master Servicer to
service and administer the related Mortgage Loans and REO Property. The Trustee
shall have no liability with respect to the use of any such limited power of
attorney.

     The Trustee or the Custodian shall provide access to the records and
documentation in possession of the Trustee or the Custodian regarding the
related Mortgage Loans and REO Property and the servicing thereof to the
Certificateholders, the FDIC, and the supervisory agents and examiners of the
FDIC, such access being afforded only upon reasonable prior written request and
during normal business hours at the office of the Trustee or the Custodian;
provided, however, that, unless otherwise required by law, the Trustee or the
Custodian shall not be required to provide access to such records and
documentation if the provision thereof would violate the legal right to privacy
of any Mortgagor. The Trustee or the Custodian shall allow representatives of
the above entities to photocopy any of the records and documentation and shall
provide equipment for that purpose at a charge that covers the Trustee's or the
Custodian's actual costs.

     The Trustee shall execute and deliver to the related Servicer and the
Master Servicer upon request any court pleadings, requests for trustee's sale or
other documents necessary or desirable to (i) the foreclosure or trustee's sale
with respect to a Mortgaged Property; (ii) any legal action brought to obtain
judgment against any Mortgagor on the Mortgage Note or Security Instrument;
(iii) obtain a deficiency judgment against the Mortgagor; or (iv) enforce any
other rights or remedies provided by the Mortgage Note or Security Instrument or
otherwise available at law or equity.

     Section 3.02 REMIC-Related Covenants. For as long as each REMIC shall
exist, the Trustee and the Securities Administrator shall act in accordance
herewith to assure continuing treatment of such REMIC as a REMIC, and the
Trustee and the Securities Administrator shall comply with any directions of the
Depositor, the related Servicer or the Master Servicer to assure such continuing
treatment. In particular, the Trustee shall not (a) sell or permit the sale of
all or any portion of the Mortgage Loans or of any investment of deposits in an
Account unless such sale is as a result of a repurchase of the Mortgage Loans
pursuant to this Agreement or the Trustee has received a REMIC Opinion prepared
at the expense of the Issuing Entity; and (b) other than with respect to a
substitution pursuant to the Mortgage Loan Purchase Agreement or Section 2.04 of
this Agreement, as applicable, accept any contribution to any REMIC after the
Startup Day without receipt of a REMIC Opinion.

     Section 3.03 Monitoring of Servicers.

     (a) The Master Servicer shall be responsible for reporting to the Trustee
and the Depositor the compliance by each Servicer with its duties under the
related Servicing Agreement. In the review of each Servicer's activities, the
Master Servicer may rely upon an


                                      -53-

<PAGE>

officer's certificate of the Servicer with regard to such Servicer's compliance
with the terms of its Servicing Agreement. In the event that the Master
Servicer, in its judgment, determines that a Servicer should be terminated in
accordance with its Servicing Agreement, or that a notice should be sent
pursuant to such Servicing Agreement with respect to the occurrence of an event
that, unless cured, would constitute grounds for such termination, the Master
Servicer shall notify the Depositor and the Trustee thereof and the Master
Servicer shall issue such notice or take such other action as it deems
appropriate.

     (b) The Master Servicer, for the benefit of the Trustee and the
Certificateholders, shall enforce the obligations of each Servicer under the
related Servicing Agreement, and shall, in the event that a Servicer fails to
perform its obligations in accordance with the related Servicing Agreement,
subject to the preceding paragraph, terminate the rights and obligations of such
Servicer thereunder and act as servicer of the related Mortgage Loans or, if the
Master Servicer is unwilling or unable to act as a Servicer, the Master Servicer
shall cause the Trustee to enter in to a new Servicing Agreement with a
successor Servicer selected by the Master Servicer that is eligible in
accordance with the criteria specified in this Agreement; provided, however, it
is understood and acknowledged by the parties hereto that there will be a period
of transition (not to exceed 90 days) before the actual servicing functions can
be fully transferred to such successor servicer. In either event, such
enforcement, including, without limitation, the legal prosecution of claims,
termination of the Servicing Agreements and the pursuit of other appropriate
remedies, shall be in such form and carried out to such an extent and at such
time as the Master Servicer, in its good faith business judgment, would require
were it the owner of the related Mortgage Loans. The Master Servicer shall pay
the costs of such enforcement at its own expense subject to Section 3.03(c),
provided that the Master Servicer shall not be required to prosecute or defend
any legal action except to the extent that the Master Servicer shall have
received reasonable indemnity for its costs and expenses in pursuing such
action.

     (c) To the extent that the costs and expenses of the Master Servicer
related to any termination of a Servicer, appointment of a successor Servicer or
the transfer and assumption of servicing by the Master Servicer with respect to
any Servicing Agreement (including, without limitation, (i) all legal costs and
expenses and all due diligence costs and expenses associated with an evaluation
of the potential termination of a Servicer as a result of an event of default by
such Servicer and (ii) all costs and expenses associated with the complete
transfer of servicing, including all servicing files and all servicing data and
the completion, correction or manipulation of such servicing data as may be
required by the successor servicer to correct any errors or insufficiencies in
the servicing data or otherwise to enable the successor service to service the
Mortgage Loans in accordance with the related Servicing Agreement) are not fully
and timely reimbursed by the terminated Servicer, the Master Servicer shall be
entitled to reimbursement of such costs and expenses from the Master Servicer
Collection Account pursuant to Section 4.03(b).

     (d) The Master Servicer shall require each Servicer to comply with the
remittance requirements and other obligations set forth in the related Servicing
Agreement.

     (e) If the Master Servicer acts as Servicer, it will not assume liability
for the representations and warranties of such Servicer, if any, that it
replaces.


                                      -54-

<PAGE>

     Section 3.04 Fidelity Bond. The Master Servicer, at its expense, shall
maintain in effect a blanket fidelity bond and an errors and omissions insurance
policy, affording coverage with respect to all directors, officers, employees
and other Persons acting on such Master Servicer's behalf, and covering errors
and omissions in the performance of the Master Servicer's obligations hereunder.
The errors and omissions insurance policy and the fidelity bond shall be in such
form and amount generally acceptable for entities serving as master servicers or
trustees.

     Section 3.05 Power to Act; Procedures. The Master Servicer shall master
service the Mortgage Loans and shall have full power and authority, subject to
the REMIC Provisions and the provisions of Article X hereof, to do any and all
things that it may deem necessary or desirable in connection with the master
servicing and administration of the Mortgage Loans, including but not limited to
the power and authority (i) to execute and deliver, on behalf of the
Certificateholders and the Trustee, customary consents or waivers and other
instruments and documents, (ii) to consent to transfers of any Mortgaged
Property and assumptions of the Mortgage Notes and related Mortgages, (iii) to
collect any Insurance Proceeds and Liquidation Proceeds, and (iv) to effectuate
foreclosure or other conversion of the ownership of the Mortgaged Property
securing any Mortgage Loan, in each case, in accordance with the provisions of
this Agreement and the related Servicing Agreement, as applicable; provided,
however, that the Master Servicer shall not (and, consistent with its
responsibilities under Section 3.03, shall not permit any Servicer to) knowingly
or intentionally take any action, or fail to take (or fail to cause to be taken)
any action reasonably within its control and the scope of duties more
specifically set forth herein, that, under the REMIC Provisions, if taken or not
taken, as the case may be, would cause any REMIC created hereunder to fail to
qualify as a REMIC or result in the imposition of a tax upon the Issuing Entity
(including but not limited to the tax on prohibited transactions as defined in
Section 860F(a)(2) of the Code and the tax on contributions to a REMIC set forth
in Section 860G(d) of the Code) unless the Master Servicer has received an
Opinion of Counsel (but not at the expense of the Master Servicer) to the effect
that the contemplated action will not would cause any REMIC created hereunder to
fail to qualify as a REMIC or result in the imposition of a tax upon any REMIC
created hereunder. The Trustee shall furnish the Master Servicer, upon written
request from a Servicing Officer, with any limited powers of attorney (in form
acceptable to the Trustee) empowering the Master Servicer or any Servicer to
execute and deliver instruments of satisfaction or cancellation, or of partial
or full release or discharge, and to foreclose upon or otherwise liquidate
Mortgaged Property, and to appeal, prosecute or defend in any court action
relating to the Mortgage Loans or the Mortgaged Property, in accordance with the
applicable Servicing Agreement and this Agreement, and the Trustee shall execute
and deliver such other documents, as the Master Servicer may request, to enable
the Master Servicer to master service and administer the Mortgage Loans and
carry out its duties hereunder, in each case in accordance with Accepted Master
Servicing Practices (and the Trustee shall have no liability for misuse of any
such powers of attorney by the Master Servicer or any Servicer). If the Master
Servicer or the Trustee has been advised that it is likely that the laws of the
state in which action is to be taken prohibit such action if taken in the name
of the Trustee or that the Trustee would be adversely affected under the "doing
business" or tax laws of such state if such action is taken in its name, the
Master Servicer shall join with the Trustee in the appointment of a co-trustee
pursuant to Section 9.11 hereof. In the performance of its duties hereunder, the
Master Servicer shall be an independent contractor and shall not, except in
those instances where it is taking action in the name of the Trustee, be deemed
to be the agent of the Trustee.


                                      -55-

<PAGE>

     Section 3.06 Due-on-Sale Clauses; Assumption Agreements. To the extent
provided in the applicable Servicing Agreement, to the extent Mortgage Loans
contain enforceable due-on-sale clauses, the Master Servicer shall cause the
Servicers to enforce such clauses in accordance with the applicable Servicing
Agreement. If applicable law prohibits the enforcement of a due-on-sale clause
or such clause is otherwise not enforced in accordance with the applicable
Servicing Agreement, and, as a consequence, a Mortgage Loan is assumed, the
original Mortgagor may be released from liability in accordance with the
applicable Servicing Agreement.

     Section 3.07 Release of Mortgage Files.

     (a) Upon becoming aware of the payment in full of any Mortgage Loan, or the
receipt by any Servicer of a notification that payment in full has been escrowed
in a manner customary for such purposes for payment to Certificateholders on the
next Distribution Date, the Servicers or the Master Servicer will, if required
under the applicable Servicing Agreement, promptly furnish to the Custodian, on
behalf of the Trustee, two copies of a certification substantially in the form
of Exhibit D hereto signed by a Servicing Officer or in a mutually agreeable
electronic format which will, in lieu of a signature on its face, originate from
a Servicing Officer (which certification shall include a statement to the effect
that all amounts received in connection with such payment that are required to
be deposited in the Protected Account maintained by the applicable Servicer
pursuant to its Servicing Agreement have been or will be so deposited) and shall
request that the Custodian, on behalf of the Trustee, deliver to the applicable
Servicer the related Mortgage File. Upon receipt of such certification and
request, the Custodian, on behalf of the Trustee, shall no later than five
Business Days (or, to the extent that the applicable Servicer notifies the
Seller that a document is not in the Servicer's possession as part of the
Servicing File which is needed for purposes of the Servicer complying with any
applicable law, within such shorter period as may be necessary to enable the
Servicer to comply with such law), release the related Mortgage File to the
applicable Servicer and the Trustee and Custodian shall have no further
responsibility with regard to such Mortgage File. Upon any such payment in full,
each Servicer is authorized, to give, as agent for the Trustee, as the mortgagee
under the Mortgage that secured the Mortgage Loan, an instrument of satisfaction
(or assignment of mortgage without recourse) regarding the Mortgaged Property
subject to the Mortgage, which instrument of satisfaction or assignment, as the
case may be, shall be delivered to the Person or Persons entitled thereto
against receipt therefor of such payment, it being understood and agreed that no
expenses incurred in connection with such instrument of satisfaction or
assignment, as the case may be, shall be chargeable to the Protected Account.

     (b) From time to time and as appropriate for the servicing or foreclosure
of any Mortgage Loan and in accordance with the applicable Servicing Agreement,
the Trustee shall execute such documents as requested and as shall be prepared
and furnished to the Trustee by a Servicer or the Master Servicer and as are
necessary to the prosecution of any such proceedings. In connection with the
foregoing, the Custodian, on behalf of the Trustee, shall, upon the request of a
Servicer or the Master Servicer, and delivery to the Custodian, on behalf of the
Trustee, of two copies of a Request for Release signed by a Servicing Officer
substantially in the form of Exhibit D (or in a mutually agreeable electronic
format which will, in lieu of a signature on its face, originate from a
Servicing Officer), release the related Mortgage File held in its possession or
control to the related Servicer or the Master Servicer, as applicable. Such
trust receipt shall


                                      -56-

<PAGE>

obligate the related Servicer or the Master Servicer to return the Mortgage File
to the Custodian on behalf of the Trustee, when the need therefor by the
Servicer or the Master Servicer no longer exists unless the Mortgage Loan shall
be liquidated, in which case, upon receipt of a certificate of a Servicing
Officer similar to that hereinabove specified, the Mortgage File shall be
released by the Custodian, on behalf of the Trustee, to the related Servicer or
the Master Servicer.

     Section 3.08 Documents, Records and Funds in Possession of Master Servicer
To Be Held for Trustee.

     (a) The Master Servicer shall transmit and each Servicer (to the extent
required by the related Servicing Agreement) shall transmit to the Trustee or
Custodian such documents and instruments coming into the possession of the
Master Servicer or such Servicer from time to time as are required by the terms
hereof, or in the case of the Servicers, the applicable Servicing Agreement, to
be delivered to the Trustee or Custodian. Any funds received by the Master
Servicer or by a Servicer in respect of any Mortgage Loan or which otherwise are
collected by the Master Servicer or by a Servicer as Liquidation Proceeds or
Insurance Proceeds in respect of any Mortgage Loan shall be held for the benefit
of the Trustee and the Certificateholders subject to the Master Servicer's right
to retain or withdraw from the Master Servicer Collection Account the Master
Servicing Compensation and other amounts provided in this Agreement, and to the
right of each Servicer to retain its Servicing Fee and other amounts as provided
in the applicable Servicing Agreement. The Master Servicer shall, and (to the
extent provided in the applicable Servicing Agreement) shall cause each Servicer
to, provide access to information and documentation regarding the Mortgage Loans
to the Trustee, its agents and accountants at any time upon reasonable request
and during normal business hours, and to Certificateholders that are savings and
loan associations, banks or insurance companies, the Office of Thrift
Supervision, the FDIC and the supervisory agents and examiners of such Office
and Corporation or examiners of any other federal or state banking or insurance
regulatory authority if so required by applicable regulations of the Office of
Thrift Supervision or other regulatory authority, such access to be afforded
without charge but only upon reasonable request in writing and during normal
business hours at the offices of the Master Servicer designated by it. In
fulfilling such a request, the Master Servicer shall not be responsible for
determining the sufficiency of such information.

     (b) All Mortgage Files and funds collected or held by, or under the control
of, the Master Servicer, in respect of any Mortgage Loans, whether from the
collection of principal and interest payments or from Liquidation Proceeds or
Insurance Proceeds, shall be held by the Master Servicer for and on behalf of
the Trustee and the Certificateholders and shall be and remain the sole and
exclusive property of the Trustee; provided, however, that the Master Servicer
and each Servicer shall be entitled to setoff against, and deduct from, any such
funds any amounts that are properly due and payable to the Master Servicer or
such Servicer under this Agreement or the applicable Servicing Agreement.

     Section 3.09 Standard Hazard Insurance and Flood Insurance Policies.

     (a) For each Mortgage Loan, the Master Servicer shall enforce any
obligation of the Servicers under the related Servicing Agreements to maintain
or cause to be maintained standard fire and casualty insurance and, where
applicable, flood insurance, all in accordance with the


                                      -57-

<PAGE>

provisions of the related Servicing Agreements. It is understood and agreed that
such insurance shall be with insurers meeting the eligibility requirements set
forth in the applicable Servicing Agreement and that no earthquake or other
additional insurance is to be required of any Mortgagor or to be maintained on
property acquired in respect of a defaulted loan, other than pursuant to such
applicable laws and regulations as shall at any time be in force and as shall
require such additional insurance.

     (b) Pursuant to Sections 4.01 and 4.02, any amounts collected by the
Servicers or the Master Servicer, under any insurance policies (other than
amounts to be applied to the restoration or repair of the property subject to
the related Mortgage or released to the Mortgagor in accordance with the
applicable Servicing Agreement) shall be deposited into the Master Servicer
Collection Account, subject to withdrawal pursuant to Sections 4.02 and 4.03 in
accordance with the terms and conditions of the related Servicing Agreement. Any
cost incurred by the Master Servicer or any Servicer in maintaining any such
insurance if the Mortgagor defaults in its obligation to do so shall be added to
the amount owing under the Mortgage Loan where the terms of the Mortgage Loan so
permit; provided, however, that the addition of any such cost shall not be taken
into account for purposes of calculating the distributions to be made to
Certificateholders and shall be recoverable by the Master Servicer or such
Servicer pursuant to Sections 4.02 and 4.03.

     Section 3.10 Presentment of Claims and Collection of Proceeds. The Master
Servicer shall (to the extent provided in the applicable Servicing Agreement)
cause the related Servicer to, prepare and present on behalf of the Trustee and
the Certificateholders all claims under the Insurance Policies and take such
actions (including the negotiation, settlement, compromise or enforcement of the
insured's claim) as shall be necessary to realize recovery under such policies.
Any proceeds disbursed to the Master Servicer (or disbursed to a Servicer and
remitted to the Master Servicer) in respect of such policies, bonds or contracts
shall be promptly deposited in the Master Servicer Collection Account upon
receipt, except that any amounts realized that are to be applied to the repair
or restoration of the related Mortgaged Property as a condition precedent to the
presentation of claims on the related Mortgage Loan to the insurer under any
applicable Insurance Policy need not be so deposited (or remitted).

     Section 3.11 Maintenance of the Primary Mortgage Insurance Policies.

     (a) The Master Servicer shall not take, or permit any Servicer (to the
extent such action is prohibited under the applicable Servicing Agreement) to
take, any action that would result in noncoverage under any applicable Primary
Mortgage Insurance Policy of any loss which, but for the actions of such Master
Servicer or Servicer, would have been covered thereunder. The Master Servicer
shall use its best reasonable efforts to cause each Servicer (to the extent
required under the related Servicing Agreement) to keep in force and effect (to
the extent that the Mortgage Loan requires the Mortgagor to maintain such
insurance), primary mortgage insurance applicable to each Mortgage Loan in
accordance with the provisions of this Agreement and the related Servicing
Agreement, as applicable. The Master Servicer shall not, and shall not permit
any Servicer (to the extent required under the related Servicing Agreement) to,
cancel or refuse to renew any such Primary Mortgage Insurance Policy that is in
effect at the date of the initial issuance of the Mortgage Note and is required
to be kept in force hereunder


                                      -58-

<PAGE>

except in accordance with the provisions of this Agreement and the related
Servicing Agreement, as applicable.

     (b) The Master Servicer agrees to present, or to cause each Servicer (to
the extent required under the related Servicing Agreement) to present, on behalf
of the Trustee and the Certificateholders, claims to the insurer under any
Primary Mortgage Insurance Policies and, in this regard, to take such reasonable
action as shall be necessary to permit recovery under any Primary Mortgage
Insurance Policies respecting defaulted Mortgage Loans. Pursuant to Section 4.01
and 4.02, any amounts collected by the Master Servicer or any Servicer under any
Primary Mortgage Insurance Policies shall be deposited in the Master Servicer
Collection Account, subject to withdrawal pursuant to Section 4.03.

     Section 3.12 Trustee to Retain Possession of Certain Insurance Policies and
Documents. The Trustee or the Custodian shall retain possession and custody of
the originals (to the extent available) of any Primary Mortgage Insurance
Policies, or certificate of insurance if applicable, and any certificates of
renewal as to the foregoing as may be issued from time to time as contemplated
by this Agreement. Until all amounts distributable in respect of the
Certificates have been distributed in full and the Master Servicer otherwise has
fulfilled its obligations under this Agreement, the Trustee or its Custodian
shall also retain possession and custody of each Mortgage File in accordance
with and subject to the terms and conditions of this Agreement. The Master
Servicer shall promptly deliver or cause to be delivered to the Trustee or the
Custodian upon the execution or receipt thereof the originals of any Primary
Mortgage Insurance Policies, any certificates of renewal, and such other
documents or instruments that constitute portions of the Mortgage File that come
into the possession of the Master Servicer from time to time.

     Section 3.13 Realization Upon Defaulted Mortgage Loans. The Master Servicer
shall cause each Servicer (to the extent required under the related Servicing
Agreement) to foreclose upon, repossess or otherwise comparably convert the
ownership of Mortgaged Properties securing such of the Mortgage Loans as come
into and continue in default and as to which no satisfactory arrangements can be
made for collection of delinquent payments, all in accordance with the terms and
conditions of the applicable Servicing Agreement.

     Section 3.14 Compensation for the Master Servicer. The Master Servicer will
be entitled to all income and gain realized from any investment of funds in the
Master Servicer Collection Account, pursuant to Article IV, for the performance
of its activities hereunder. Servicing compensation in the form of assumption
fees, if any, late payment charges, as collected, if any, or otherwise (but not
including any prepayment premium or penalty) shall be retained by the applicable
Servicer and shall not be deposited in the Protected Account. The Master
Servicer shall be required to pay all expenses incurred by it in connection with
its activities hereunder and shall not be entitled to reimbursement therefor
except as provided in this Agreement.

     Section 3.15 REO Property.

     (a) In the event the Issuing Entity acquires ownership of any REO Property
in respect of any related Mortgage Loan, the deed or certificate of sale shall
be issued to the Trustee, or to


                                      -59-

<PAGE>

its nominee, on behalf of the related Certificateholders. The Master Servicer
shall, to the extent provided in the applicable Servicing Agreement, cause the
applicable Servicer to sell, any REO Property as expeditiously as possible and
in accordance with the provisions of this Agreement and the related Servicing
Agreement, as applicable. Pursuant to its efforts to sell such REO Property, the
Master Servicer shall cause the applicable Servicer to protect and conserve,
such REO Property in the manner and to the extent required by the applicable
Servicing Agreement, in accordance with the REMIC Provisions and in a manner
that does not result in a tax on "net income from foreclosure property" or cause
such REO Property to fail to qualify as "foreclosure property" within the
meaning of Section 860G(a)(8) of the Code.

     (b) The Master Servicer shall, to the extent required by the related
Servicing Agreement, cause the applicable Servicer to deposit all funds
collected and received in connection with the operation of any REO Property in
the Protected Account.

     (c) The Master Servicer and the applicable Servicer, upon the final
disposition of any REO Property, shall be entitled to reimbursement for any
related unreimbursed Monthly Advances and other unreimbursed advances as well as
any unpaid Servicing Fees from Liquidation Proceeds received in connection with
the final disposition of such REO Property; provided, that any such unreimbursed
Monthly Advances as well as any unpaid Servicing Fees may be reimbursed or paid,
as the case may be, prior to final disposition, out of any net rental income or
other net amounts derived from such REO Property.

     (d) To the extent provided in the related Servicing Agreement, the
Liquidation Proceeds from the final disposition of the REO Property, net of any
payment to the Master Servicer and the applicable Servicer as provided above
shall be deposited in the Protected Account on or prior to the Determination
Date in the month following receipt thereof and be remitted by wire transfer in
immediately available funds to the Master Servicer for deposit into the related
Master Servicer Collection Account on the next succeeding Servicer Remittance
Date.

     Section 3.16 Annual Statement as to Compliance.

     Not later than March 1 of each calendar year (other than the calendar year
during which the Closing Date occurs), each Servicer shall deliver (or otherwise
make available) and each Servicer shall cause any Servicing Function Participant
engaged by it to deliver to the Master Servicer, the Securities Administrator
and the Depositor, an Officer's Certificate in the form attached hereto as
Exhibit P stating, as to each signatory thereof, that (i) a review of the
activities of such signatory during the preceding calendar year, or portion
thereof, and of the performance of such signatory under the related Servicing
Agreement or such other applicable agreement in the case of a Servicing Function
Participant has been made under such officer's supervision, and (ii) to the best
of such officer's knowledge, based on such review, such signatory has fulfilled
all its obligations under this Agreement, the related Servicing Agreement or
such other applicable agreement in all material respects throughout such year or
a portion thereof, or, if there has been a failure to fulfill any such
obligation in any material respect, specifying each such failure known to such
officer and the nature and status thereof.


                                      -60-

<PAGE>

     The Master Servicer and the Securities Administrator shall deliver (or
otherwise make available) (and the Master Servicer and Securities Administrator
shall cause any Servicing Function Participant engaged by it to deliver) to the
Depositor and the Securities Administrator on or before March 1 (with a
ten-calendar day cure period) of each year, commencing in March 2008, an
Officer's Certificate stating, as to the signer thereof, that (A) a review of
such party's activities during the preceding calendar year or portion thereof
and of such party's performance under this Agreement, or such other applicable
agreement in the case of a Servicing Function Participant, has been made under
such officer's supervision and (B) to the best of such officer's knowledge,
based on such review, such party has fulfilled all its obligations under this
Agreement, or such other applicable agreement in the case of a Servicing
Function Participant, in all material respects throughout such year or portion
thereof, or, if there has been a failure to fulfill any such obligation in any
material respect, specifying each such failure known to such officer and the
nature and status thereof.

     The Master Servicer shall include all annual statements of compliance
received by it from each Servicer with its own annual statement of compliance to
be submitted to the Securities Administrator pursuant to this Section.

     In the event the Master Servicer, the Securities Administrator or any
Servicing Function Participant engaged by any such party is terminated, assigns
its rights and obligations under or resigns pursuant to the terms of this
Agreement, or such other applicable agreement in the case of a Servicing
Function Participant, as the case may be, such party shall provide, an annual
statement of compliance pursuant to this Section 3.16 or to such applicable
agreement, as the case may be, notwithstanding any such termination, assignment
or resignation.

     Section 3.17 Reports on Assessment of Compliance and Attestation.

     (a) Not later than March 1 of each calendar year (other than the calendar
year during which the Closing Date occurs) each Servicer at its own expense,
shall furnish, and shall cause any Servicing Function Participant engaged by it
to furnish (unless in the case of a Subcontractor, such Servicer has notified
the Depositor and the Master Servicer in writing that such compliance statement
is not required for the Subcontractor) to the Master Servicer, the Securities
Administrator and the Depositor an officer's assessment of its compliance with
the Relevant Servicing Criteria during the preceding calendar year as required
by Rules 13a-18 and 15d-18 of the Exchange Act and Item 1122 of Regulation AB
(the "Assessment of Compliance"), which assessment shall contain (A) a statement
by such party of its responsibility for assessing compliance with the Relevant
Servicing Criteria, (B) a statement that such party used the Relevant Servicing
Criteria to assess compliance with the Relevant Servicing Criteria, (C) such
party's assessment of compliance with the Relevant Servicing Criteria as of and
for the fiscal year covered by the Form 10-K required to be filed pursuant to
Section 3.18, including, if there has been any material instance of
noncompliance with the Relevant Servicing Criteria, a discussion of each such
failure and the nature and status thereof, which assessment shall be based on
the activities it performs with respect to asset-backed securities transactions
taken as a whole involving such party that are backed by the same asset type as
the Mortgage Loans, and (D) a statement that a registered public accounting firm
has issued an attestation report on such party's assessment of compliance with
the Relevant Servicing Criteria as of and for such period.


                                      -61-

<PAGE>

     By March 1 (with a ten-calendar day cure period) of each year, commencing
in March 2008, the Master Servicer, the Securities Administrator and the
Custodian each at its own expense, shall furnish or otherwise make available,
and each such party shall cause any Servicing Function Participant engaged by it
to furnish, each at its own expense, to the Securities Administrator and the
Depositor, a report on an assessment of compliance with the Relevant Servicing
Criteria that contains (A) a statement by such party of its responsibility for
assessing compliance with the Relevant Servicing Criteria, (B) a statement that
such party used the Relevant Servicing Criteria to assess compliance with the
Relevant Servicing Criteria, (C) such party's assessment of compliance with the
Relevant Servicing Criteria as of and for the fiscal year covered by the Form
10-K required to be filed pursuant to Sections 3.18(h), (i), (j) and (k),
including, if there has been any material instance of noncompliance with the
Relevant Servicing Criteria, a discussion of each such failure and the nature
and status thereof, and (D) a statement that a registered public accounting firm
has issued an attestation report on such party's assessment of compliance with
the Relevant Servicing Criteria as of and for such period.

     No later than the end of each fiscal year for the Trust for which a 10-K is
required to be filed, the Master Servicer, the Custodian shall each forward to
the Securities Administrator and the Depositor the name of each Servicing
Function Participant engaged by it and what Relevant Servicing Criteria will be
addressed in the report on assessment of compliance prepared by such Servicing
Function Participant (provided, however, that the Master Servicer need not
provide such information to the Securities Administrator so long as the Master
Servicer and the Securities Administrator are the same Person). When the Master
Servicer, and the Securities Administrator (or any Servicing Function
Participant engaged by them) submit their assessments to the Securities
Administrator, such parties will also at such time include the assessment and
attestation pursuant to this Section 3.17 of each Servicing Function Participant
engaged by it.

     Promptly after receipt of each report on assessment of compliance, (i) the
Depositor shall review each such report and, if applicable, consult with such
Servicer, the Master Servicer, the Securities Administrator and any Servicing
Function Participant engaged by any such party as to the nature of any material
instance of noncompliance with the Relevant Servicing Criteria by such Servicer
by each such party, and (ii) the Securities Administrator shall confirm that the
assessments individually address the Relevant Servicing Criteria for each party
as set forth on Exhibit K or any similar exhibit set forth in each Servicing
Agreement in respect of each Servicer and notify the Depositor of any
exceptions.

     The Master Servicer shall include all annual reports on assessment of
compliance received by it from the Servicers with its own assessment of
compliance to be submitted to the Securities Administrator pursuant to this
Section.

     In the event the Master Servicer, the Securities Administrator or any
Servicing Function Participant engaged by any such party is terminated, assigns
its rights and obligations under or resigns pursuant to the terms of this
Agreement, or any other applicable agreement, as the case may be, such party
shall provide, an assessment of compliance pursuant to this Section 3.17,
coupled with an attestation as required in this Section 3.17, or such applicable
agreement notwithstanding any such termination, assignment or resignation.


                                      -62-

<PAGE>

     (b) Not later than March 1 of each calendar year (other than the calendar
year during which the Closing Date occurs) each Servicer at its own expense,
shall cause, and shall cause any Servicing Function Participant engaged by it to
cause (unless in the case of a Subcontractor, such Servicer has notified the
Depositor and the Master Servicer in writing that such report is not required
for the Subcontractor) a nationally or regionally recognized firm of independent
registered public accountants (who may also render other services to such
Servicer, the Master Servicer or any affiliate thereof) which is a member of the
American Institute of Certified Public Accountants to furnish a report (the
"Accountant's Attestation") to the Master Servicer, the Securities Administrator
and the Depositor to the effect that (i) it has obtained a representation
regarding certain matters from the management of such party, which includes an
assertion that such party has complied with the Relevant Servicing Criteria, and
(ii) on the basis of an examination conducted by such firm in accordance with
standards for attestation engagements issued or adopted by the Public Company
Accounting Oversight Board, it is expressing an opinion as to whether such
party's compliance with the Relevant Servicing Criteria was fairly stated in all
material respects, or it cannot express an overall opinion regarding such
party's assessment of compliance with the Relevant Servicing Criteria. In the
event that an overall opinion cannot be expressed, such registered public
accounting firm shall state in such report why it was unable to express such an
opinion. Such report must be available for general use and not contain
restricted use language. Such Accountant's Attestation shall be in accordance
with Rules 1-02(a)(3) and 2-02(g) of Regulation S-X under the Securities Act and
the Exchange Act.

     By March 1 (with a ten-calendar day cure period) of each year, commencing
in March 2007, the Master Servicer, the Securities Administrator and the
Custodian, each at its own expense, shall cause, and each such party shall cause
any Servicing Function Participant engaged by it to cause, each at its own
expense, a registered public accounting firm (which may also render other
services to the Master Servicer, the Securities Administrator, or such other
Servicing Function Participants, as the case may be) and that is a member of the
American Institute of Certified Public Accountants to furnish an attestation
report to the Securities Administrator and the Depositor, to the effect that (i)
it has obtained a representation regarding certain matters from the management
of such party, which includes an assertion that such party has complied with the
Relevant Servicing Criteria, and (ii) on the basis of an examination conducted
by such firm in accordance with standards for attestation engagements issued or
adopted by the Public Company Accounting Oversight Board, it is expressing an
opinion as to whether such party's compliance with the Relevant Servicing
Criteria was fairly stated in all material respects, or it cannot express an
overall opinion regarding such party's assessment of compliance with the
Relevant Servicing Criteria. In the event that an overall opinion cannot be
expressed, such registered public accounting firm shall state in such report why
it was unable to express such an opinion. Such report must be available for
general use and not contain restricted use language.

     (c) Promptly after receipt of each assessment of compliance and attestation
report, the Securities Administrator shall confirm that each assessment
submitted pursuant to Section 3.17(a) is coupled with an attestation meeting the
requirements of Section 3.17(b) and notify the Depositor of any exceptions.

     The Master Servicer shall include each such attestation furnished to it by
the Servicers with its own attestation to be submitted to the Securities
Administrator pursuant to this Section.


                                      -63-

<PAGE>

     In the event the Master Servicer, the Securities Administrator, the
Custodian, any Servicer or any Servicing Function Participant engaged by any
such party, is terminated, assigns its rights and duties under, or resigns
pursuant to the terms of, this Agreement, or any applicable Custodial Agreement,
Servicing Agreement or sub-servicing agreement, as the case may be, such party
shall cause a registered public accounting firm to provide an attestation
pursuant to this Section 3.17, or such other applicable agreement,
notwithstanding any such termination, assignment or resignation.

     Section 3.18 Periodic Filings.

     (a) Within four (4) Business Days after the occurrence of an event
requiring disclosure on Form 8-K (each such event, a "Reportable Event"), and if
requested by the Depositor, the Securities Administrator shall prepare and file
on behalf of the Issuing Entity a Form 8-K, as required by the Exchange Act,
provided that the Depositor shall file the initial Form 8-K in connection with
the issuance of the Certificates. Any disclosure or information related to a
Reportable Event or that is otherwise required to be included on Form 8-K (other
than the initial Form 8-K) ("Form 8-K Disclosure Information") shall be reported
by the parties set forth on Exhibit Q-3 to the Depositor and the Securities
Administrator and directed and approved by the Depositor, and the Securities
Administrator will have no duty or liability for any failure hereunder to
determine or prepare any Form 8-K Disclosure Information or any Form 8-K except
as set forth in the next paragraph.

     (b) For so long as the Issuing Entity is subject to the reporting
requirements of the Exchange Act, following the occurrence of a Reportable Event
(A) each party listed on Exhibit Q-3 hereto shall use commercially reasonable
best efforts to provide immediate notice to the Master Servicer, the Securities
Administrator and the Depositor, by fax and by phone or by e-mail and by phone,
(B) each such party shall be required to provide to the Securities Administrator
and the Depositor, to the extent known, in EDGAR-compatible format or in such
other format as agreed upon by the Securities Administrator and such party, the
form and substance of any Form 8-K Disclosure Information if applicable,
together with the form set forth on Exhibit O (the "Additional Disclosure
Notification") by the close of business New York City time on the 2nd Business
Day following the occurrence of such Reportable Event and (C) the Depositor,
shall approve, as to form and substance, or disapprove, as the case may be, the
inclusion of the Form 8-K Disclosure Information on Form 8-K. The Securities
Administrator has no duty under this Agreement to monitor or enforce the
performance by the parties listed on Exhibit Q-3 of their duties under this
paragraph or proactively solicit or procure from such parties any Form 8-K
Disclosure Information. The Depositor will be responsible for any reasonable
fees and expenses assessed or incurred by the Securities Administrator in
connection with including any Form 8-K Disclosure Information on Form 8-K
pursuant to this paragraph.

     (c) After preparing the Form 8-K, the Securities Administrator shall, upon
request, forward electronically a copy of the Form 8-K to the Depositor.
Promptly, but no later than the close of business on the third Business Day
after the Reportable Event, the Depositor shall notify the Securities
Administrator in writing (which may be furnished electronically) of any changes
to or approval of such Form 8-K. In the absence of receipt of any written
changes or approval, or if the Depositor does not request a copy of a Form 8-K,
the Securities Administrator shall be entitled to assume that such Form 8-K is
in final form and the Securities Administrator may


                                      -64-

<PAGE>

proceed with the process for execution and filing of the Form 8-K. A duly
authorized representative of the Master Servicer shall sign each Form 8-K. If a
Form 8-K cannot be filed on time or if a previously filed Form 8-K needs to be
amended, the Securities Administrator will follow the procedures set forth in
Section 3.18(n).

     (d) Promptly (but no later than one Business Day) after filing with the
Commission, the Securities Administrator will make available on its internet
website a final executed copy of each Form 8-K prepared and filed by the
Securities Administrator. The parties to this Agreement acknowledge that the
performance by the Master Servicer and the Securities Administrator of its
duties under this Section 3.18 related to the timely preparation, execution and
filing of Form 8-K is contingent upon the other parties hereto strictly
observing all applicable deadlines in the performance of their duties under this
Section 3.18. The Depositor acknowledges that the performance by the Master
Servicer and the Securities Administrator of its duties under this Section 3.18
related to the timely preparation, execution and filing of Form 8-K is also
contingent upon the Servicers, the Custodian and any Servicing Function
Participant strictly observing deadlines no later than those set forth in this
paragraph that are applicable to the parties to this Agreement in the delivery
to the Securities Administrator of any necessary Form 8-K Disclosure Information
pursuant to the related Servicing Agreements, the Custodial Agreement or any
other applicable agreement. Neither the Master Servicer nor the Securities
Administrator shall have any liability for any loss, expense, damage or claim
arising out of or with respect to any failure to properly prepare, execute
and/or timely file such Form 8-K, where such failure results from the Securities
Administrator's inability or failure to obtain or receive, on a timely basis,
any information from any other party hereto or any Servicer, Custodian or
Servicing Function Participant needed to prepare, arrange for execution or file
such Form 8-K.

     (e) Within fifteen (15) days after each Distribution Date (subject to
permitted extensions under the Exchange Act), the Securities Administrator
shall, on behalf of the Issuing Entity and in accordance with industry
standards, prepare and file with the Commission via the Electronic Data
Gathering and Retrieval System (EDGAR), a Form 10-D with a copy of the Monthly
Statement for such Distribution Date as an exhibit thereto. Any disclosure in
addition to the Monthly Statement that is required to be included on Form 10-D
("Additional Form 10-D Disclosure") shall be reported by the parties set forth
on Exhibit Q-1 to the Depositor and the Securities Administrator and directed
and approved by the Depositor pursuant to the following paragraph, and the
Securities Administrator will have no duty or liability for any failure
hereunder to determine or prepare any Additional Form 10-D Disclosure except as
set forth in the next paragraph.

     (f) As set forth in Exhibit Q-1 hereto, for so long as the Issuing Entity
is subject to the reporting requirements of the Exchange Act, within five (5)
calendar days after the related Distribution Date (i) each party listed on
Exhibit Q-1 hereto shall be required to provide to the Depositor and the
Securities Administrator, to the extent known, in EDGAR-compatible format or in
such other format as agreed upon by the Securities Administrator and such party,
the form and substance of any Additional Form 10-D Disclosure if applicable
together with an Additional Disclosure Notification, and (ii) the Depositor will
approve, as to form and substance, or disapprove, as the case may be, the
inclusion of the Additional Form 10-D Disclosure on Form 10-D. The Securities
Administrator has no duty under this Agreement to monitor or enforce the
performance by the parties listed on Exhibit Q-1 of their duties under this
paragraph or


                                      -65-

<PAGE>

proactively solicit or procure from such parties any Additional Form 10-D
Disclosure Information. The Depositor will be responsible for any reasonable
fees and expenses incurred by the Securities Administrator in connection with
including any Additional Form 10-D Disclosure on Form 10-D pursuant to this
paragraph.

     (g) After preparing the Form 10-D, the Securities Administrator shall, upon
request, forward electronically a copy of the Form 10-D to the Depositor
(provided that such Form 10-D includes any Additional Form 10-D Disclosure).
Within two Business Days after receipt of such copy, but no later than the 12th
calendar day after the Distribution Date, the Depositor shall notify the
Securities Administrator in writing (which may be furnished electronically) of
any changes to or approval of such Form 10-D. In the absence of receipt of any
written changes or approval, or if the Depositor does not request a copy of a
Form 10-D, the Securities Administrator shall be entitled to assume that such
Form 10-D is in final form and the Securities Administrator may proceed with the
process for execution and filing of the Form 10-D. A duly authorized
representative of the Master Servicer shall sign each Form 10-D. If a Form 10-D
cannot be filed on time or if a previously filed Form 10-D needs to be amended,
the Securities Administrator will follow the procedures set forth in Section
3.18(n). Promptly (but not later than one Business Day) after filing with the
Commission, the Securities Administrator will make available on its internet
website a final executed copy of each Form 10-D prepared and filed by the
Securities Administrator. Form 10-D requires the registrant to indicate (by
checking "yes" or "no") that it "(1) has filed all reports required to be filed
by Section 13 or 15(d) of the Exchange Act during the preceding 12 months (or
for such shorter period that the registrant was required to file such reports),
and (2) has been subject to such filing requirements for the past 90 days." The
Depositor hereby instructs the Securities Administrator, with respect to each
Form 10-D, to check "yes" for each item unless the Securities Administrator has
received timely prior written notice from the Depositor that the answer should
be "no" for an item. The parties to this Agreement acknowledge that the
performance by the Master Servicer and the Securities Administrator of its
respective duties under this Section 3.18 related to the timely preparation,
execution and filing of Form 10-D is contingent upon the other parties hereto
strictly observing all applicable deadlines in the performance of their duties
under this Section 3.18. The Depositor acknowledges that the performance by the
Master Servicer and the Securities Administrator of its duties under this
Section 3.18 related to the timely preparation, execution and filing of Form
10-D is also contingent upon the Servicers, the Custodian and any Servicing
Function Participant strictly observing deadlines no later than those set forth
in this paragraph that are applicable to the parties to this Agreement in the
delivery to the Securities Administrator of any necessary Additional Form 10-D
Disclosure pursuant to the related Servicing Agreements, the Custodial Agreement
or any other applicable agreement. Neither the Master Servicer nor the
Securities Administrator will have any liability for any loss, expense, damage
or claim arising out of or with respect to any failure to properly prepare,
execute and/or timely file such Form 10-D resulting from the Securities
Administrator's inability or failure to obtain or receive any information needed
to prepare, arrange for execution or file such Form 10-D on a timely basis.

     (h) On or prior to the 90th calendar day after the end of the fiscal year
for the Issuing Entity or such earlier date as may be required by the Exchange
Act (the "10-K Filing Deadline") (it being understood that the fiscal year for
the Issuing Entity ends on December 31st of each year) commencing in March 2008,
the Securities Administrator shall, on behalf of the Issuing Entity and in
accordance with industry standards, prepare and file with the Commission via


                                      -66-
<PAGE>

EDGAR a Form 10-K with respect to the Issuing Entity. Such Form 10-K shall
include the following items, in each case, as applicable, to the extent they
have been delivered to the Securities Administrator within the applicable time
frames set forth in this Agreement, the related Servicing Agreements and
Custodial Agreement: (i) an annual compliance statement for the Master Servicer,
each Servicer, the Securities Administrator and any Servicing Function
Participant engaged by any such party (together with the Custodian, each a
"Reporting Servicer"), as described in Section 3.16 of this Agreement, the
related Servicing Agreement and the Custodial Agreement; provided, however, that
the Securities Administrator, at its discretion, may omit from the Form 10-K any
annual compliance statement that is not required to be filed with such Form 10-K
pursuant to Regulation AB; (ii)(A) the annual reports on assessment of
compliance with Servicing Criteria for each Reporting Servicer (unless the
Depositor has determined that such compliance statement is not required by
Regulation AB), as described in Section 3.17 of this Agreement, the related
Servicing Agreement and the Custodial Agreement, and (B) if any Reporting
Servicer's report on assessment of compliance with Servicing Criteria described
in Section 3.17 identifies any material instance of noncompliance, disclosure
identifying such instance of noncompliance, or if any Reporting Servicer's
report on assessment of compliance with Servicing Criteria described in Section
3.17 of this Agreement is not included as an exhibit to such Form 10-K,
disclosure that such report is not included and an explanation why such report
is not included; provided, however, that the Securities Administrator, at its
discretion, may omit from the Form 10-K any assessment of compliance or
attestation report described in clause (iii) below that is not required to be
filed with such Form 10-K pursuant to Regulation AB; (iii)(A) the registered
public accounting firm attestation report for each Reporting Servicer, as
described in Section 3.17 of this Agreement, the related Servicing Agreement and
the Custodial Agreement, and (B) if any registered public accounting firm
attestation report described under Section 3.17 of this Agreement identifies any
material instance of noncompliance, disclosure identifying such instance of
noncompliance, or if any such registered public accounting firm attestation
report is not included as an exhibit to such Form 10-K, disclosure that such
report is not included and an explanation why such report is not included, and
(iv) a Sarbanes-Oxley Certification in the form attached hereto as Exhibit L,
executed by the senior officer in charge of the master servicing functions. Any
disclosure or information in addition to (i) through (iv) above that is required
to be included on Form 10-K ("Additional Form 10-K Disclosure") shall be
reported by the parties as set forth in Exhibit Q-2 to the Depositor and the
Securities Administrator and directed and approved by the Depositor pursuant to
the following paragraph and the Securities Administrator will have no duty or
liability for any failure hereunder to determine or prepare any Additional Form
10-K Disclosure except or set forth in the next paragraph.

     (i) As set forth in Exhibit Q-2 hereto, no later than March 1 (with a ten
calendar day cure period) of each year that the Issuing Entity is subject to the
Exchange Act reporting requirements, commencing in March 2008, (i) the parties
listed on Exhibit Q-2 hereto shall be required to provide to the Depositor and
the Securities Administrator, to the extent known, in EDGAR-compatible format or
in such other format as agreed upon by the Securities Administrator and such
party, the form and substance of any Additional Form 10-K Disclosure, if
applicable together with an Additional Disclosure Notification, and (ii) the
Depositor will approve, as to form and substance, or disapprove, as the case may
be, the inclusion of the Additional Form 10-K Disclosure. The Securities
Administrator has no duty under this Agreement to monitor or enforce the
performance by the parties listed on Exhibit Q-2 of their


                                      -67-

<PAGE>

duties under this paragraph or proactively solicit or procure from such parties
any Additional Form 10-K Disclosure Information. The Depositor will be
responsible for any reasonable fees and expenses incurred by the Securities
Administrator in connection with including any Additional Form 10-K Disclosure
on Form 10-K pursuant to this paragraph.

     (j) After preparing the Form 10-K, the Securities Administrator shall, upon
request, forward electronically a copy of the Form 10-K to the Depositor. Within
three Business Days after receipt of such copy, but no later than March 25th,
the Depositor shall notify the Securities Administrator in writing (which may be
furnished electronically) of any changes to or approval of such Form 10-K. In
the absence of receipt of any written changes or approval, or if the Depositor
does not request a copy of a Form 10-K, the Securities Administrator shall be
entitled to assume that such Form 10-K is in final form and the Securities
Administrator may proceed with the process for execution and filing of the Form
10-K. A senior officer of the Master Servicer in charge of the master servicing
function shall sign the Form 10-K. If a Form 10-K cannot be filed on time or if
a previously filed Form 10-K needs to be amended, the Securities Administrator
will follow the procedures set forth in Section 3.18(n). Promptly (but no later
than one Business Day) after filing with the Commission, the Securities
Administrator will make available on its internet website a final executed copy
of each Form 10-K prepared and filed by the Securities Administrator. Form 10-K
requires the registrant to indicate (by checking "yes" or "no") that it "(1) has
filed all reports required to be filed by Section 13 or 15(d) of the Exchange
Act during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days." The Depositor hereby instructs the
Securities Administrator, with respect to each Form 10-K, to check "yes" for
each item unless the Securities Administrator has received timely prior written
notice from the Depositor that the answer should be "no" for an item. The
parties to this Agreement acknowledge that the performance by the Master
Servicer and the Securities Administrator of its duties under this Section 3.18
related to the timely preparation, execution and filing of Form 10-K is
contingent upon such parties (and any Servicing Function Participant) strictly
observing all applicable deadlines in the performance of their duties under this
Section 3.18, Section 3.16 and Section 3.17. The Depositor acknowledges that the
performance by the Master Servicer and the Securities Administrator of its
duties under this Section 3.18 related to the timely preparation, execution and
filing of Form 10-K is also contingent upon the Servicers, the Custodian and any
Servicing Function Participant strictly observing deadlines no later than those
set forth in this paragraph that are applicable to the parties to this Agreement
in the delivery to the Securities Administrator of any necessary Additional Form
10-K Disclosure, any annual statement of compliance and any assessment of
compliance and attestation pursuant to the related Servicing Agreement, the
Custodial Agreement or any other applicable agreement. Neither the Master
Servicer nor the Securities Administrator shall have any liability for any loss,
expense, damage or claim arising out of or with respect to any failure to
properly prepare, execute and/or timely file such Form 10-K resulting from the
Securities Administrator's inability or failure to obtain or receive any
information from any other party hereto or any Servicer, Custodian or Servicing
Function Participant needed to prepare, execute or file such Form 10-K.

     (k) Each Form 10-K shall include a Sarbanes-Oxley Certification, which
shall be in the form attached hereto as Exhibit L. Each Servicer shall sign and
provide, and each of the Servicers, the Master Servicer and the Securities
Administrator shall cause any Servicing Function Participant engaged by it to
sign and provide, to the person who signs the Sarbanes-


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<PAGE>

Oxley Certification (the "Certifying Person") by March 1 (with a ten day cure
period) of each year in which the Issuing Entity is subject to the reporting
requirements of the Exchange Act and otherwise within a reasonable period of
time upon request, a certification (a "Back-Up Certification") (in the form
attached hereto as Exhibit M) upon which the Certifying Person, the entity for
which the Certifying Person acts as an officer and such entity's officers,
directors and affiliates (collectively, with the Certifying Person, the
"Certification Parties") can reasonably rely. The senior officer of the Master
Servicer in charge of the master servicing function shall serve as the
Certifying Person on behalf of the Trust. Such officer of the Certifying Person
can be contacted by e-mail at cts.sec.notifications@wellsfargo.com or by
facsimile at 410-715-2380. In the event any such party or Servicing Function
Participant engaged by any such party is terminated or resigns pursuant to the
terms of this Agreement, or any other applicable agreement, as the case may be,
such party shall provide a Back-Up Certification to the Master Servicer pursuant
to this Section 3.18 with respect to the period of time it was subject to this
Agreement or any other applicable agreement, as the case may be. Notwithstanding
the foregoing, (i) the Master Servicer and the Securities Administrator shall
not be required to deliver a Back-Up Certification to each other if both are the
same Person and the Master Servicer is the Certifying Person and (ii) the Master
Servicer shall not be obligated to sign the Sarbanes-Oxley Certification in the
event that it does not receive any Back-Up Certification required to be
furnished to it pursuant to this section or any Servicing Agreement or Custodial
Agreement.

     (l) The Securities Administrator shall have no responsibility to file any
items with the Commission other than those specified in this section and the
Master Servicer shall execute any and all Form 10-Ds, 8-Ks and 10-Ks required
hereunder.

     (m) On or prior to January 30 of the first year in which the Securities
Administrator is able to do so under applicable law, the Securities
Administrator shall prepare and file a Form 15 Suspension Notification relating
to the automatic suspension of reporting in respect of the Issuing Entity under
the Exchange Act.

     (n) In the event that the Securities Administrator is unable to timely file
with the Commission all or any required portion of any Form 8-K, 10-D or 10-K
required to be filed by this Agreement because required disclosure information
was either not delivered to it or delivered to it after the delivery deadlines
set forth in this Agreement or for any other reason, the Securities
Administrator will promptly notify electronically the Depositor of such
inability to make a timely filing with the Commission. In the case of Form 10-D
and 10-K, the parties to this Agreement will cooperate to prepare and file a
Form 12b-25 and a 10-D/A and 10K/A, as applicable, pursuant to Rule 12b-25 of
the Exchange Act. In the case of Form 8-K, the Securities Administrator will,
upon receipt of all required Form 8-K Disclosure Information and upon the
approval and direction of the Depositor, include such disclosure information on
the next succeeding Form 10-D to be filed for the Issuing Entity. In the event
that any previously filed Form 8-K, 10-D or 10-K needs to be amended, in
connection with any Additional Form 10-D Disclosure (other than, in the case of
Form 10-D, for the purpose of restating any Monthly Statement), Additional Form
10-K Disclosure or Form 8-K Disclosure Information, the Securities Administrator
will electronically notify the Depositor and such other parties to the
transaction as are affected by such amendment, and such parties will cooperate
to prepare any necessary 8-K/A, 10-D/A or 10-K/A. Any Form 15, Form 12b-25 or
any amendment to Form 8-K, 10-D or 10-K shall be signed by duly authorized
representative or a senior officer in charge of


                                      -69-

<PAGE>

master servicing, as applicable, of the Master Servicer. The parties to this
Agreement acknowledge that the performance by the Master Servicer of its duties
under this Section 3.18 related to the timely preparation, execution and filing
of Form 15, a Form 12b-25 or any amendment to Form 8-K, 10-D or 10-K is
contingent upon each such party performing its duties under this Section.
Neither the Master Servicer nor the Securities Administrator shall have any
liability for any loss, expense, damage or claim arising out of or with respect
to any failure to properly prepare, execute and/or timely file any such Form 15,
Form 12b-25 or any amendments to Forms 8-K, 10-D or 10-K, where such failure
results from the Securities Administrator's inability or failure to receive, on
a timely basis, any information from any other party hereto or any Servicer, any
Custodian or any Servicing Function Participant needed to prepare, arrange for
execution or file such Form 15, Form 12b-25 or any amendments to Forms 8-K, 10-D
or 10-K.

     (o) The Depositor and the Securities Administrator agree to use their good
faith efforts to cooperate in complying with the requirements of this Section
3.18.

     (p) Each of the parties agrees to provide to the Securities Administrator
such additional information related to such party as the Securities
Administrator may reasonably request, including evidence of the authorization of
the person signing any certificate or statement, financial information and
reports, and such other information related to such party or its performance
hereunder.

     (q) Any notice or notification required to be delivered by the Securities
Administrator or Master Servicer to the Depositor pursuant to this Section 3.18,
may be delivered via facsimile to (212) 449-2700, via email to paul_park@ml.com
or telephonically by calling Paul Park at (212) 449-6380.

     Section 3.19 Compliance with Regulation AB. Each of the parties hereto
acknowledges and agrees that the purpose of Sections 3.16, 3.17 and 3.18 is to
facilitate compliance by the Depositor with the provisions of Regulation AB, as
such may be amended or clarified from time to time. Therefore, each of the
parties agrees that the parties' obligations hereunder will be supplemented and
modified as necessary to be consistent with any such amendments, interpretive
advice or guidance, convention or consensus among active participants in the
asset-backed securities markets, advice of counsel, or otherwise in respect of
the requirements of Regulation AB and the parties shall comply with requests
made by the Depositor for delivery of additional or different information as the
Depositor may determine in good faith is necessary to comply with the provisions
of Regulation AB. Any such supplementation or modification shall be made in
accordance with Section 11.02 without the consent of the Certificateholders, and
may result in a change in the reports filed by the Securities Administrator on
behalf of the Issuing Entity under the Exchange Act.

                                   ARTICLE IV
                                    ACCOUNTS

     Section 4.01 Protected Accounts.

     (a) The Master Servicer shall enforce the obligation of each Servicer to
establish and maintain a Protected Account in accordance with the applicable
Servicing Agreement, with


                                      -70-

<PAGE>

records to be kept with respect thereto on a Mortgage Loan by Mortgage Loan
basis, into which accounts shall be deposited within two Business Days (or as of
such other time specified in the related Servicing Agreement) of receipt all
collections of principal and interest on any Mortgage Loan and with respect to
any REO Property received by a Servicer, including Principal Prepayments,
Insurance Proceeds, Liquidation Proceeds, Subsequent Recoveries and advances
made from the Servicer's own funds (less servicing compensation as permitted by
the applicable Servicing Agreement in the case of the Servicer) and all other
amounts to be deposited in the Protected Account. The Servicer is hereby
authorized to make withdrawals from and deposits to the related Protected
Account for purposes required or permitted by this Agreement. To the extent
provided in the related Servicing Agreement, the Protected Account shall be held
in a Designated Depository Institution and segregated on the books of such
institution in the name of the Trustee for the benefit of Certificateholders.

     (b) To the extent provided in the related Servicing Agreement, amounts on
deposit in a Protected Account may be invested in Permitted Investments in the
name of the Trustee for the benefit of Certificateholders and, except as
provided in the preceding paragraph, not commingled with any other funds, such
Permitted Investments to mature, or to be subject to redemption or withdrawal,
no later than the date on which such funds are required to be withdrawn for
deposit in the Master Servicer Collection Account, and shall be held until
required for such deposit. The income earned from Permitted Investments made
pursuant to this Section 4.01 shall be paid to the related Servicer under the
applicable Servicing Agreement, and the risk of loss of moneys required to be
distributed to the Certificateholders resulting from such investments shall be
borne by and be the risk of the related Servicer, as set forth in the applicable
Servicing Agreement. The related Servicer (to the extent provided in the related
Servicing Agreement) shall deposit the amount of any such loss in the Protected
Account within two Business Days of receipt of notification of such loss but not
later than the second Business Day prior to the Distribution Date on which the
moneys so invested are required to be distributed to the Certificateholders.

     (c) To the extent provided in the related Servicing Agreement and subject
to this Article IV, on or before each Servicer Remittance Date, the related
Servicer shall withdraw or shall cause to be withdrawn from the Protected
Accounts and shall immediately deposit or cause to be deposited in the Master
Servicer Collection Account amounts representing the following collections and
payments (other than with respect to principal of or interest on the Mortgage
Loans due on or before the Cut-off Date) with respect to each Loan Group:

          (i) Monthly Payments on the Mortgage Loans received or any related
     portion thereof advanced by such Servicer pursuant to the related Servicing
     Agreement which were due on or before the related Due Date, net of the
     amount thereof comprising the Servicing Fees;

          (ii) Principal Prepayments in Full and any Liquidation Proceeds
     received by such Servicer with respect to such Mortgage Loans in the
     related Prepayment Period, with interest to the date of prepayment or
     liquidation, net of the amount thereof comprising the Servicing Fees;

          (iii) Curtailments received by such Servicer for such Mortgage Loans
     in the related Prepayment Period; and


                                      -71-

<PAGE>

          (iv) Any amount to be used as a Monthly Advance.

     (d) Withdrawals by the Master Servicer may be made from an Account only to
make remittances as provided in Section 4.01(c), 4.02 and 4.03; to reimburse the
Master Servicer or a Servicer for Monthly Advances which have been recovered by
subsequent collection from the related Mortgagor; to remove amounts deposited in
error; to remove fees, charges or other such amounts deposited on a temporary
basis; or to clear and terminate the account at the termination of this
Agreement in accordance with Section 10.01. As provided in Sections 4.01(c) and
4.02(b) certain amounts otherwise due to the Servicers may be retained by them
as set forth in the related Servicing Agreements and need not be deposited in
the Master Servicer Collection Account.

     Section 4.02 Master Servicer Collection Account.

     (a) The Master Servicer shall establish and maintain in the name of the
Trustee, for the benefit of the Certificateholders, the Master Servicer
Collection Account as a segregated trust account or accounts. The Master
Servicer Collection Account may be a sub-account of the Distribution Account.
The Master Servicer will deposit in the Master Servicer Collection Account as
identified by the Master Servicer and as received by the Master Servicer, the
following amounts:

          (i) Any amounts withdrawn from a Protected Account or other permitted
     account;

          (ii) Any Monthly Advance and any Compensating Interest Payments;

          (iii) Any Insurance Proceeds, Liquidation Proceeds or Subsequent
     Recoveries received by or on behalf of the Master Servicer or which were
     not deposited in a Protected Account or other permitted account;

          (iv) The repurchase price with respect to any Mortgage Loans
     repurchased and all proceeds of any Mortgage Loans or property acquired in
     connection with the optional termination of the trust;

          (v) Any amounts required to be deposited with respect to losses on
     investments of deposits in an Account; and

          (vi) Any other amounts received by or on behalf of the Master Servicer
     and required to be deposited in the Master Servicer Collection Account
     pursuant to this Agreement.

     (b) All amounts deposited to the Master Servicer Collection Account shall
be held by the Master Servicer in the name of the Trustee in trust for the
benefit of the Certificateholders in accordance with the terms and provisions of
this Agreement. The requirements for crediting the Master Servicer Collection
Account or the Distribution Account shall be exclusive, it being understood and
agreed that, without limiting the generality of the foregoing, payments in the
nature of (i) prepayment or late payment charges or assumption, tax service,
statement account or payoff, substitution, satisfaction, release and other like
fees and charges and (ii) the items enumerated in Subsections 4.05(a)(i), (ii),
(iii), (iv), (vi), (vii), (viii), (ix), (xi) and (xii) with


                                      -72-

<PAGE>

respect to the Securities Administrator, need not be credited by the Master
Servicer or the related Servicer to the Distribution Account or the Master
Servicer Collection Account, as applicable. In the event that the Master
Servicer shall deposit or cause to be deposited to the Distribution Account any
amount not required to be credited thereto, the Securities Administrator, upon
receipt of a written request therefor signed by a Servicing Officer of the
Master Servicer, shall promptly transfer such amount to the Master Servicer from
the Distribution Account, any provision herein to the contrary notwithstanding.

     (c) The amount at any time credited to the Master Servicer Collection
Account shall be invested, in the name of the Trustee, or its nominee, for the
benefit of the Certificateholders, in Permitted Investments as directed by
Master Servicer. All Permitted Investments shall mature or be subject to
redemption or withdrawal on or before, and shall be held until, the next
succeeding Distribution Account Deposit Date. Any and all investment earnings on
amounts on deposit in the Master Servicer Collection Account from time to time
shall be for the account of the Master Servicer. The Master Servicer from time
to time shall be permitted to withdraw or receive distribution of any and all
investment earnings from the Master Servicer Collection Account. The risk of
loss of moneys required to be distributed to the Certificateholders resulting
from such investments shall be borne by and be the risk of the Master Servicer.
The Master Servicer shall deposit the amount of any such loss in the Master
Servicer Collection Account within two Business Days of receipt of notification
of such loss but not later than the second Business Day prior to the
Distribution Date on which the moneys so invested are required to be distributed
to the Certificateholders.

     Section 4.03 Permitted Withdrawals and Transfers from the Master Servicer
Collection Account.

     (a) The Master Servicer will, from time to time on demand of the Master
Servicer, the Trustee or the Securities Administrator, make or cause to be made
such withdrawals or transfers from the Master Servicer Collection Account as the
Master Servicer has designated for such transfer or withdrawal pursuant to the
Servicing Agreements. The Master Servicer may clear and terminate the Master
Servicer Collection Account pursuant to Section 10.01 and remove amounts from
time to time deposited in error.

     (b) On an ongoing basis, the Master Servicer shall withdraw from the Master
Servicer Collection Account (i) any expenses recoverable by the Trustee, the
Master Servicer or the Securities Administrator pursuant to this Agreement,
including but not limited to Sections 2.01(b), 3.03, 7.04 and 9.05 and (ii) any
amounts payable to the Master Servicer as set forth in Section 3.14.

     (c) In addition, on or before each Distribution Account Deposit Date, the
Master Servicer shall deposit in the Distribution Account (or remit to the
Securities Administrator for deposit therein) any Monthly Advances required to
be made by the Master Servicer with respect to the Mortgage Loans.

     (d) No later than 3:00 p.m. New York time on each Distribution Account
Deposit Date, the Master Servicer will transfer all Available Funds on deposit
in the Master Servicer


                                      -73-

<PAGE>

Collection Account with respect to the related Distribution Date to the
Securities Administrator for deposit in the Distribution Account.

     Section 4.04 Distribution Account.

     (a) The Securities Administrator shall establish and maintain in the name
of the Trustee, for the benefit of the Certificateholders, the Distribution
Account as a segregated trust account or accounts.

     (b) All amounts deposited to the Distribution Account shall be held by the
Securities Administrator in the name of the Trustee in trust for the benefit of
the Certificateholders in accordance with the terms and provisions of this
Agreement.

     (c) The Distribution Account shall constitute a trust account of the Trust
Fund segregated on the books of the Securities Administrator and held by the
Securities Administrator in trust in its Corporate Trust Office, and the
Distribution Account and the funds deposited therein shall not be subject to,
and shall be protected to the maximum extent permitted by applicable law from,
all claims, liens, and encumbrances of any creditors or depositors of the
Securities Administrator, the Trustee or the Master Servicer (whether made
directly, or indirectly through a liquidator or receiver of the Securities
Administrator, the Trustee or the Master Servicer). The Distribution Account
shall be an Eligible Account. The amount at any time credited to the
Distribution Account shall be (i) fully insured by the FDIC to the maximum
coverage provided thereby or (ii) invested in the name of the Trustee, in such
Permitted Investments selected by the Master Servicer or deposited in demand
deposits with such depository institutions as selected by the Master Servicer,
provided that time deposits of such depository institutions would be a Permitted
Investment. All Permitted Investments shall mature or be subject to redemption
or withdrawal on or before, and shall be held until, the next succeeding
Distribution Date if the obligor for such Permitted Investment is the Master
Servicer or, if such obligor is any other Person, the Business Day preceding
such Distribution Date. All investment earnings on amounts on deposit in the
Distribution Account or benefit from funds uninvested therein from time to time
shall be for the account of the Securities Administrator. The Securities
Administrator shall be permitted to withdraw or receive distribution of any and
all investment earnings from the Distribution Account on each Distribution Date.
If there is any loss on a Permitted Investment or demand deposit, the Securities
Administrator shall deposit such amount in the Distribution Account. With
respect to the Distribution Account and the funds deposited therein, the
Securities Administrator shall take such action as may be necessary to ensure
that the Certificateholders shall be entitled to the priorities afforded to such
a trust account (in addition to a claim against the estate of the Trust) as
provided by 12 U.S.C. Section 92a(e), and applicable regulations pursuant
thereto, if applicable, or any applicable comparable state statute applicable to
state chartered banking corporations.

     Section 4.05 Permitted Withdrawals and Transfers from the Distribution
Account.

     (a) The Securities Administrator will, from time to time on demand of the
Master Servicer, make or cause to be made such withdrawals or transfers from the
Distribution Account as the Master Servicer has designated for such transfer or
withdrawal pursuant to the Servicing Agreements for the following purposes
(limited in the case of amounts due the Master Servicer


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<PAGE>

to those not withdrawn from the Master Servicer Collection Account in accordance
with the terms of this Agreement):

          (i) to reimburse the Master Servicer or any Servicer for any Monthly
     Advance of its own funds or any advance of such Servicer's own funds, the
     right of the Master Servicer or a Servicer to reimbursement pursuant to
     this subclause (i) being limited to amounts received on a particular
     Mortgage Loan (including, for this purpose, the Purchase Price therefor,
     Insurance Proceeds and Liquidation Proceeds) which represent late payments
     or recoveries of the principal of or interest on such Mortgage Loan
     respecting which such Monthly Advance or advance was made;

          (ii) to reimburse the Master Servicer or any Servicer from Insurance
     Proceeds or Liquidation Proceeds relating to a particular Mortgage Loan for
     amounts expended by the Master Servicer or such Servicer in good faith as a
     Servicing Advance in connection with the restoration of the related
     Mortgaged Property which was damaged by an Uninsured Cause or in connection
     with the liquidation of such Mortgage Loan;

          (iii) to reimburse the Master Servicer or any Servicer from Insurance
     Proceeds relating to a particular Mortgage Loan for insured expenses
     incurred with respect to such Mortgage Loan and to reimburse the Master
     Servicer or such Servicer from Liquidation Proceeds from a particular
     Mortgage Loan for Liquidation Expenses incurred with respect to such
     Mortgage Loan; provided that the Master Servicer shall not be entitled to
     reimbursement for Liquidation Expenses with respect to a Mortgage Loan to
     the extent that (i) any amounts with respect to such Mortgage Loan were
     paid as Excess Liquidation Proceeds pursuant to clause (xi) of this
     Subsection 4.03 (a) to the Master Servicer; and (ii) such Liquidation
     Expenses were not included in the computation of such Excess Liquidation
     Proceeds;

          (iv) to pay the Master Servicer or any Servicer, as appropriate, from
     Liquidation Proceeds or Insurance Proceeds received in connection with the
     liquidation of any Mortgage Loan, the amount which it or such Servicer
     would have been entitled to receive under subclause (ix) of this Subsection
     4.03(a) as servicing compensation on account of each defaulted scheduled
     payment on such Mortgage Loan if paid in a timely manner by the related
     Mortgagor;

          (v) to pay the Master Servicer or any Servicer from the Purchase Price
     for any Mortgage Loan, the amount which it or such Servicer would have been
     entitled to receive under subclause (ix) of this Subsection 4.03 (a) as
     servicing compensation;

          (vi) to reimburse the Master Servicer or any Servicer for advances of
     funds pursuant to Sections, and the right to reimbursement pursuant to this
     subclause being limited to amounts received on the related Mortgage Loan
     (including, for this purpose, the Purchase Price therefor, Insurance
     Proceeds and Liquidation Proceeds) which represent late recoveries of the
     payments for which such advances were made;

          (vii) to reimburse the Master Servicer or any Servicer for any Monthly
     Advance or advance, after a Realized Loss has been allocated with respect
     to the related


                                      -75-

<PAGE>

     Mortgage Loan if the Monthly Advance or advance has not been reimbursed
     pursuant to clauses (i) and (vi);

          (viii) to pay the Master Servicer as set forth in Section 3.14;

          (ix) to reimburse the Master Servicer for expenses, costs and
     liabilities incurred by and reimbursable to it pursuant to this Agreement,
     including but not limited to Sections 3.03, 7.04(c) and (d);

          (x) to pay to the Master Servicer, as additional servicing
     compensation, any Excess Liquidation Proceeds to the extent not retained by
     the related Servicer;

          (xi) to reimburse or pay any Servicer any such amounts as are due
     thereto under the applicable Servicing Agreement and have not been retained
     by or paid to the Servicer, to the extent provided in the related Servicing
     Agreement;

          (xii) to reimburse the Trustee or the Securities Administrator for
     expenses, costs and liabilities incurred by or reimbursable to it pursuant
     to this Agreement;

          (xiii) to remove amounts deposited in error; and

          (xiv) to clear and terminate the Distribution Account pursuant to
     Section 9.01.

     (b) The Master Servicer shall keep and maintain separate accounting, on a
Mortgage Loan by Mortgage Loan basis, for the purpose of accounting for any
reimbursement from the Distribution Account pursuant to subclauses (i) through
(vi), inclusive, and (viii) or with respect to any such amounts which would have
been covered by such subclauses had the amounts not been retained by the Master
Servicer without being deposited in the Distribution Account under Section
4.02(b).

     (c) On each Distribution Date, the Securities Administrator shall
distribute the Available Funds for each Loan Group to the Holders of the
Certificates in accordance with Section 6.01.

                                    ARTICLE V
                                  CERTIFICATES

     Section 5.01 The Certificates. The Certificates shall be executed by manual
or facsimile signature on behalf of the Securities Administrator by an
authorized officer. Certificates bearing the manual or facsimile signatures of
individuals who were, at the time when such signatures were affixed, authorized
to sign on behalf of the Securities Administrator shall bind the Issuing Entity,
notwithstanding that such individuals or any of them have ceased to be so
authorized prior to the authentication and delivery of such Certificates or did
not hold such offices at the date of such authentication and delivery. No
Certificate shall be entitled to any benefit under this Agreement, or be valid
for any purpose, unless there appears on such Certificate a certificate of
authentication substantially in the form set forth as attached hereto executed
by the Securities Administrator by manual signature, and such certificate of
authentication upon any Certificate shall be conclusive evidence, and the only
evidence, that such Certificate has been duly


                                      -76-

<PAGE>

authenticated and delivered hereunder. All Certificates shall be dated the date
of their authentication. On the Closing Date, the Securities Administrator shall
authenticate the Certificates to be issued at the written direction of the
Depositor, or any Affiliate thereof.

     Section 5.02 Certificate Register; Registration of Transfer and Exchange of
Certificates.

     (a) The Securities Administrator shall maintain, or cause to be maintained
in accordance with the provisions of Section 5.09 hereof, a Certificate Register
for the Trust Fund in which, subject to the provisions of subsections (b) and
(c) below and to such reasonable regulations as it may prescribe, the Securities
Administrator shall provide for the registration of Certificates and of
Transfers and exchanges of Certificates as herein provided. Upon surrender for
registration of Transfer of any Certificate, the Securities Administrator shall
authenticate and deliver, in the name of the designated transferee or
transferees, one or more new Certificates of the same Class and of like
aggregate Percentage Interest.

     At the option of a Certificateholder, Certificates may be exchanged for
other Certificates of the same Class in authorized denominations and evidencing
the same aggregate Percentage Interest upon surrender of the Certificates to be
exchanged at the office or agency of the Securities Administrator. Whenever any
Certificates are so surrendered for exchange, the Securities Administrator shall
execute, authenticate and deliver the Certificates that the Certificateholder
making the exchange is entitled to receive. Every Certificate presented or
surrendered for registration of Transfer or exchange shall be accompanied by a
written instrument of Transfer in form satisfactory to the Securities
Administrator duly executed by the holder thereof or his attorney duly
authorized in writing.

     No service charge to the Certificateholders shall be made for any
registration of Transfer or exchange of Certificates, but payment of a sum
sufficient to cover any tax or governmental charge that may be imposed in
connection with any Transfer or exchange of Certificates may be required. All
Certificates surrendered for registration of Transfer or exchange shall be
canceled and subsequently destroyed by the Securities Administrator in
accordance with such Securities Administrator's customary procedures.

     (b) No Transfer of an ERISA Restricted Certificate or Class A-R Certificate
shall be made unless such Transfer is made pursuant to an effective registration
statement under the Securities Act and any applicable state securities laws or
is exempt from the registration requirements under the Securities Act and such
state securities laws. In the event that a Transfer is to be made in reliance
upon an exemption from the Securities Act and such laws, in order to assure
compliance with the Securities Act and such laws, the Certificateholder desiring
to effect such Transfer and such Certificateholder's prospective transferee
shall (except with respect to the initial transfer of an ERISA Restricted
Certificate or Class A-R Certificate by Merrill Lynch & Co.) each certify to
each Securities Administrator in writing the facts surrounding the Transfer in
substantially the form set forth in Exhibit F-1 (the "Transferor Representation
Letter") and (i) deliver a letter in substantially the form of either Exhibit
F-2 (the "Investor Representation Letter") or Exhibit F-3 (the "Rule 144A
Letter") or (ii) there shall be delivered to the Securities Administrator an
Opinion of Counsel that such Transfer may be made pursuant to an exemption from
the Securities Act, which Opinion of Counsel shall not be an expense of the
Depositor or the Securities Administrator. The Depositor shall provide to any
Holder of an ERISA Restricted


                                      -77-

<PAGE>

Certificate or Class A-R Certificate and any prospective transferee designated
by any such Holder, information regarding the related Certificates and the
Mortgage Loans and such other information as shall be necessary to satisfy the
condition to eligibility set forth in Rule 144A(d)(4) for Transfer of any such
Certificate without registration thereof under the Securities Act pursuant to
the registration exemption provided by Rule 144A. The Securities Administrator
shall cooperate with the Depositor in providing the Rule 144A information
referenced in the preceding sentence, including providing to the Depositor such
information in the possession of the Securities Administrator regarding the
Certificates, the Mortgage Loans and other matters regarding the Trust Fund as
the Depositor shall reasonably request to meet its obligation under the
preceding sentence. Each Holder of an ERISA Restricted Certificate or Class A-R
Certificate desiring to effect such Transfer shall, and does hereby agree to,
indemnify the Depositor and the Securities Administrator against any liability
that may result if the Transfer is not so exempt or is not made in accordance
with such federal and state laws.

     No transfer of an ERISA Restricted Certificate or a Class A-R Certificate
will be registered unless the Securities Administrator has received (A) a
representation to the effect that such transferee is not an employee benefit
plan subject to Title I of ERISA, a plan subject to Section 4975 of the Code or
a plan subject to any state, local, federal, non-U.S. or other law substantively
similar to the foregoing provisions of ERISA or the Code ("Similar Law")
(collectively, a "Plan"), and is not directly or indirectly acquiring such
Certificate for, on behalf of, or with any assets of any such Plan, or (B)
solely in the case of an ERISA Restricted Certificate (I) if the Certificate has
been the subject of an ERISA-Qualifying Underwriting, a representation to the
effect that such transferee is an insurance company that is acquiring the
Certificate with assets contained in an "insurance company general account," as
defined in Section V(e) of Prohibited Transaction Class Exemption ("PTCE")
95-60, and the acquisition and holding of the Certificate are covered and exempt
under Sections I and III of PTCE 95-60, or (II) solely in the case of a
Definitive Certificate, an Opinion of Counsel satisfactory to the Securities
Administrator, and upon which the Securities Administrator shall be entitled to
rely, to the effect that the acquisition and holding of such Certificate will
not constitute or result in a nonexempt prohibited transaction under Title I of
ERISA or Section 4975 of the Code, or a violation of Similar Law, and will not
subject the Securities Administrator, the Master Servicer, the Trustee or the
Depositor to any obligation in addition to those expressly undertaken in this
Agreement, which Opinion of Counsel shall not be an expense of the Securities
Administrator, the Master Servicer, the Trustee or the Depositor.

     Except in the case of a Definitive Certificate, the representations set
forth in the immediately preceding paragraph of this Subsection 5.02(b), other
than clause (B)(II) in the immediately preceding paragraph, shall be deemed to
have been made to the Securities Administrator by the transferee's acceptance of
an ERISA Restricted Certificate or a Class A-R Certificate (or the acceptance by
a Certificate Owner of the beneficial interest in any Class of ERISA Restricted
Certificates or a Class A-R Certificate).

     Notwithstanding any other provision herein to the contrary, any purported
transfer of an ERISA Restricted Certificate or a Class A-R Certificate to or on
behalf of a Plan without the delivery to the Securities Administrator of a
representation or an Opinion of Counsel satisfactory to the Securities
Administrator as described above shall be void and of no effect. The Securities
Administrator shall not be under any liability to any Person for any
registration or transfer of any


                                      -78-

<PAGE>

ERISA Restricted Certificate or Class A-R Certificate that is in fact not
permitted by this Section 5.02(b), nor shall the Trustee or the Securities
Administrator be under any liability for making any payments due on such
Certificate to the Holder thereof or taking any other action with respect to
such Holder under the provisions of this Agreement so long as the transfer was
registered by the Securities Administrator in accordance with the foregoing
requirements. The Trustee or the Securities Administrator shall be entitled, but
not obligated, to recover from any Holder of any ERISA Restricted Certificate or
Class A-R Certificate that was in fact a Plan and that held such Certificate in
violation of this Section 5.02(b) all payments made on such ERISA Restricted
Certificate or a Class A-R Certificate at and after the time it commenced such
holding. Any such payments so recovered shall be paid and delivered to the last
preceding Holder of such Certificate that is not a Plan.

     (c) Each Person who has or who acquires any Ownership Interest in a Class
A-R Certificate shall be deemed by the acceptance or acquisition of such
Ownership Interest to have agreed to be bound by the following provisions, and
the rights of each Person acquiring any Ownership Interest in a Class A-R
Certificate are expressly subject to the following provisions:

          (i) Each Person holding or acquiring any Ownership Interest in a Class
     A-R Certificate shall be a Permitted Transferee and shall promptly notify
     the Securities Administrator of any change or impending change in its
     status as a Permitted Transferee.

          (ii) No Ownership Interest in a Class A-R Certificate may be
     purchased, transferred or sold, directly or indirectly, except in
     accordance with the provisions hereof. No Ownership Interest in a Class A-R
     Certificate may be registered on the Closing Date or thereafter
     transferred, and the Securities Administrator shall not register the
     Transfer of any Class A-R Certificate unless, in addition to the
     certificates required to be delivered to the Securities Administrator under
     subparagraph (b) above, the Securities Administrator shall have been
     furnished with an affidavit (a "Transferee's Letter") of the initial owner
     or the proposed transferee in the form attached hereto as Exhibit E-1 and
     an affidavit (a "Transferor Certificate") of the proposed transferor in the
     form attached hereto as Exhibit E-2. In the absence of a contrary
     instruction from the transferor of a Class A-R Certificate, declaration
     (11) in Appendix A of the Transferee's Letter may be left blank. If the
     transferor requests by written notice to the Securities Administrator prior
     to the date of the proposed transfer that one of the two other forms of
     declaration (11) in Appendix A of the Transferee's Letter be used, then the
     requirements of this Section 5.02(c)(ii) shall not have been satisfied
     unless the Transferee's Letter includes such other form of declaration.

          (iii) Each Person holding or acquiring any Ownership Interest in a
     Class A-R Certificate shall agree (A) to obtain a Transferee's Letter from
     any other Person to whom such Person attempts to Transfer its Ownership
     Interest in a Class A-R Certificate, (B) to obtain a Transferee's Letter
     from any Person for whom such Person is acting as nominee, trustee or agent
     in connection with any Transfer of a Class A-R Certificate and (C) not to
     Transfer its Ownership Interest in a Class A-R Certificate or to cause the
     Transfer of an Ownership Interest in a Class A-R Certificate to any other
     Person if it has actual knowledge that such Person is not a Permitted
     Transferee. Further, no transfer, sale or other disposition of any
     Ownership Interest in a Class A-R Certificate may be made to a


                                      -79-

<PAGE>

     person who is not a U.S. Person (within the meaning of Section 7701 of the
     Code) unless such person furnishes the transferor and the Securities
     Administrator with a duly completed and effective Internal Revenue Service
     Form W-8ECI (or any successor thereto) and the Securities Administrator
     consents to such transfer, sale or other disposition in writing.

          (iv) Any attempted or purported Transfer of any Ownership Interest in
     a Class A-R Certificate in violation of the provisions of this Section
     5.02(c) shall be absolutely null and void and shall vest no rights in the
     purported Transferee. If any purported transferee shall become a Holder of
     a Class A-R Certificate in violation of the provisions of this Section
     5.02(c), then the last preceding Permitted Transferee shall be restored to
     all rights as Holder thereof retroactive to the date of registration of
     Transfer of such Class A-R Certificate. The Securities Administrator shall
     be under no liability to any Person for any registration of Transfer of a
     Class A-R Certificate that is in fact not permitted by Section 5.02(b) and
     this Section 5.02(c) or for making any payments due on such Certificate to
     the Holder thereof or taking any other action with respect to such Holder
     under the provisions of this Agreement so long as the Transfer was
     registered after receipt of the related Transferee's Letter. The Securities
     Administrator shall be entitled but not obligated to recover from any
     Holder of a Class A-R Certificate that was in fact not a Permitted
     Transferee at the time it became a Holder or, at such subsequent time as it
     became other than a Permitted Transferee, all payments made on such Class
     A-R Certificate at and after either such time. Any such payments so
     recovered by the Securities Administrator shall be paid and delivered by
     the Securities Administrator to the last preceding Permitted Transferee of
     such Certificate.

          (v) At the option of the Holder of the Class A-R Certificate, the
     Class LT1-R Interest and the Residual Interest may be severed and
     represented by separate certificates; provided, however, that such separate
     certification may not occur until the Securities Administrator receives a
     REMIC Opinion to the effect that separate certification in the form and
     manner proposed would not result in the imposition of federal tax upon the
     Issuing Entity or any of the REMICs provided for herein or cause any of the
     REMICs provided for herein to fail to qualify as a REMIC; and provided
     further, that the provisions of Sections 5.02(b) and (c) will apply to each
     such separate certificate as if the separate certificate were a Class A-R
     Certificate. If, as evidenced by a REMIC Opinion, it is necessary to
     preserve the REMIC status of any of the REMICs provided for herein, the
     Class LT1-R Interest and the Residual Interest shall be severed and
     represented by separate Certificates.

     The restrictions on Transfers of a Class A-R Certificate set forth in this
Section 5.02(c) shall cease to apply (and the applicable portions of the legend
on a Class A-R Certificate may be deleted) with respect to Transfers occurring
after delivery to the Securities Administrator of an Opinion of Counsel, which
Opinion of Counsel shall not be an expense of the Securities Administrator or
the Depositor, to the effect that the elimination of such restrictions will not
cause any of the REMICs provided for herein to fail to qualify as a REMIC at any
time that the Certificates are outstanding or result in the imposition of any
tax on the Issuing Entity, any REMIC provided for herein, a Certificateholder or
another Person. Each Person holding or acquiring any Ownership Interest in a
Class A-R Certificate hereby consents to any amendment


                                      -80-

<PAGE>

of this Agreement that, based on an Opinion of Counsel furnished to the
Securities Administrator, is reasonably necessary (a) to ensure that the record
ownership of, or any beneficial interest in, a Class A-R Certificate is not
transferred, directly or indirectly, to a Person that is not a Permitted
Transferee and (b) to provide for a means to compel the Transfer of a Class A-R
Certificate that is held by a Person that is not a Permitted Transferee to a
Holder that is a Permitted Transferee.

     (d) The transferor of the Class A-R Certificate shall notify the Securities
Administrator in writing upon the transfer of the Class A-R Certificate.

     (e) The preparation and delivery of all certificates, opinions and other
writings referred to above in this Section 5.02 shall not be an expense of the
Issuing Entity, the Depositor or the Securities Administrator.

     Section 5.03 Mutilated, Destroyed, Lost or Stolen Certificates. If (a) any
mutilated Certificate is surrendered to the Securities Administrator or the
Securities Administrator receives evidence to its satisfaction of the
destruction, loss or theft of any Certificate and of the ownership thereof and
(b) there is delivered to the Securities Administrator such security or
indemnity as may be required by them to save each of them harmless, then, in the
absence of notice to the Securities Administrator that such Certificate has been
acquired by a bona fide purchaser, the Securities Administrator shall execute,
authenticate and deliver, in exchange for or in lieu of any such mutilated,
destroyed, lost or stolen Certificate, a new Certificate of like Class, tenor
and Percentage Interest. In connection with the issuance of any new Certificate
under this Section 5.03, the Securities Administrator may require the payment of
a sum sufficient to cover any tax or other governmental charge that may be
imposed in relation thereto and any other expenses (including the fees and
expenses of the Securities Administrator) connected therewith. Any replacement
Certificate issued pursuant to this Section 5.03 shall constitute complete and
indefeasible evidence of ownership in the Trust Fund, as if originally issued,
whether or not the lost, stolen or destroyed Certificate shall be found at any
time. All Certificates surrendered to the Securities Administrator under the
terms of this Section 5.03 shall be canceled and destroyed by the Securities
Administrator in accordance with its standard procedures without liability on
its part.

     Section 5.04 Persons Deemed Owners. The Securities Administrator and any
agent of the Securities Administrator may treat the Person in whose name any
Certificate is registered as the owner of such Certificate for the purpose of
receiving distributions as provided in this Agreement and for all other purposes
whatsoever, and neither the Securities Administrator, nor any agent of the
Securities Administrator shall be affected by any notice to the contrary.

     Section 5.05 Access to List of Certificateholders' Names and Addresses. If
three or more Certificateholders (a) request such information in writing from
the Securities Administrator, (b) state that such Certificateholders desire to
communicate with other Certificateholders with respect to their rights under
this Agreement or under the Certificates, and (c) provide a copy of the
communication that such Certificateholders propose to transmit or if the
Depositor shall request such information in writing from the Securities
Administrator, then the Securities Administrator shall, within ten Business Days
after the receipt of such request, provide the Depositor or such
Certificateholders at such recipients' expense the most recent list of the


                                      -81-

<PAGE>

Certificateholders of the Trust Fund held by the Securities Administrator, if
any. The Depositor and every Certificateholder, by receiving and holding a
Certificate, agree that the Securities Administrator shall not be held
accountable by reason of the disclosure of any such information as to the list
of the Certificateholders hereunder, regardless of the source from which such
information was derived.

     Section 5.06 Book-Entry Certificates. The Regular Certificates, upon
original issuance, shall be issued in the form of one or more typewritten
Certificates representing the Book-Entry Certificates, to be delivered to the
Depository by or on behalf of the Depositor. The Book-Entry Certificates shall
initially be registered on the Certificate Register in the name of the
Depository or its nominee, and no Certificate Owner of a Book-Entry Certificate
will receive a definitive certificate representing such Certificate Owner's
interest in such Certificates, except as provided in Section 5.08. Unless and
until definitive, fully registered Certificates ("Definitive Certificates") have
been issued to the Certificate Owners of the Book-Entry Certificates pursuant to
Section 5.08:

     (a) the provisions of this Section shall be in full force and effect;

     (b) the Depositor and the Securities Administrator may deal with the
Depository and the Depository Participants for all purposes (including the
making of distributions) as the authorized representative of the respective
Certificate Owners of the Book-Entry Certificates;

     (c) registration of the Book-Entry Certificates may not be transferred by
the Securities Administrator except to another Depository;

     (d) the rights of the respective Certificate Owners of the Book-Entry
Certificates shall be exercised only through the Depository and the Depository
Participants and shall be limited to those established by law and agreements
between the Owners of the Book-Entry Certificates and the Depository and/or the
Depository Participants. Pursuant to the Depository Agreement, unless and until
Definitive Certificates are issued pursuant to Section 5.08, the Depository will
make book-entry transfers among the Depository Participants and receive and
transmit distributions of principal and interest on the related Certificates to
such Depository Participants;

     (e) the Depository may collect its usual and customary fees, charges and
expenses from its Depository Participants;

     (f) the Securities Administrator may rely and shall be fully protected in
relying upon information furnished by the Depository with respect to its
Depository Participants; and

     (g) to the extent that the provisions of this Section conflict with any
other provisions of this Agreement, the provisions of this Section shall
control.

     For purposes of any provision of this Agreement requiring or permitting
actions with the consent of, or at the direction of, Certificateholders
evidencing a specified percentage of the aggregate unpaid principal amount of
any Class of Certificates, such direction or consent may be given by Certificate
Owners (acting through the Depository and the Depository Participants) owning
Book-Entry Certificates evidencing the requisite percentage of principal amount
of such Class of Certificates.


                                      -82-

<PAGE>

     Section 5.07 Notices to Depository. Whenever any notice or other
communication is required to be given to Certificateholders of the Class with
respect to which Book-Entry Certificates have been issued, unless and until
Definitive Certificates shall have been issued to the related Certificate
Owners, the Securities Administrator shall give all such notices and
communications to the Depository.

     Section 5.08 Definitive Certificates. If, after Book-Entry Certificates
have been issued with respect to any Certificates, (a) the Depository or the
Depositor advises the Securities Administrator that the Depository is no longer
willing, qualified or able to discharge properly its responsibilities under the
Depository Agreement with respect to such Certificates and the Securities
Administrator or the Depositor is unable to locate a qualified successor, (b)
the Depositor notifies the Securities Administrator and the Depository of its
intent to terminate the book-entry system through the Depository and, upon
receipt of notice of such intent from the Depository, the Certificate Owners of
the Book-Entry Certificates agree to initiate such termination or (c) after the
occurrence and continuation of an Event of Default, Certificate Owners of such
Book-Entry Certificates having not less than 51% of the Voting Rights evidenced
by any Class of Book-Entry Certificates advise the Securities Administrator and
the Depository in writing through the Depository Participants that the
continuation of a book-entry system with respect to Certificates of such Class
through the Depository (or its successor) is no longer in the best interests of
the Certificate Owners of such Class, then the Securities Administrator shall
notify all Certificate Owners of such Book-Entry Certificates, through the
Depository, of the occurrence of any such event and of the availability of
Definitive Certificates to Certificate Owners of such Class requesting the same.
The Depositor shall provide the Securities Administrator with an adequate
inventory of certificates to facilitate the issuance and transfer of Definitive
Certificates. Upon surrender to the Securities Administrator of any such
Certificates by the Depository, accompanied by registration instructions from
the Depository for registration, the Securities Administrator shall authenticate
and deliver such Definitive Certificates. Neither the Depositor nor the
Securities Administrator shall be liable for any delay in delivery of such
instructions and each may conclusively rely on, and shall be protected in
relying on, such instructions. Upon the issuance of such Definitive
Certificates, all references herein to obligations imposed upon or to be
performed by the Depository shall be deemed to be imposed upon and performed by
the Securities Administrator, to the extent applicable with respect to such
Definitive Certificates and the Securities Administrator shall recognize the
Holders of such Definitive Certificates as Certificateholders hereunder.

     Section 5.09 Maintenance of Office or Agency. The Securities Administrator
will maintain or cause to be maintained at its expense an office or offices or
agency or agencies where Certificates may be surrendered for registration of
transfer or exchange. The Securities Administrator initially designates its
offices at Sixth Street and Marquette Avenue, Minneapolis, Minnesota 55479,
Attention: Corporate Trust Services - Merrill Lynch Mortgage Backed Securities
Trust, Series 2007-1 as offices for such purposes. The Securities Administrator
will give prompt written notice to the Certificateholders of any change in such
location of any such office or agency.

                                   ARTICLE VI
                         PAYMENTS TO CERTIFICATEHOLDERS


                                      -83-

<PAGE>

     Section 6.01 Distributions on the Certificates. (a) Interest and principal
on the Certificates will be distributed by the Securities Administrator monthly
on each Distribution Date, commencing in April 2007, as instructed by the Master
Servicer, in an aggregate amount equal to the sum of the Available Funds for
such Distribution Date. On each Distribution Date, the Available Funds shall be
distributed as follows:

          (A) On each Distribution Date, the Group I Available Funds will be
          distributed in the following order of priority among the Group I
          Certificates except as otherwise noted:

               first, to the Class P Certificates, any prepayment charges
               collected on the Mortgage Loans and (A) any amounts paid by the
               Sponsor or the related Servicer in respect of prepayment charges
               pursuant to this Agreement or the related Servicing Agreement and
               (B) any amounts received in respect of any indemnification paid
               as a result of a prepayment charges being unenforceable in breach
               of the representations and warranties set forth in the Mortgage
               Loan Purchase Agreement received during the related Prepayment
               Period;

               second, to the Class I-A-1, Class I-A-2 and Class A-R
               Certificates, pro rata, the Accrued Certificate Interest for such
               Distribution Date. As described below, Accrued Certificate
               Interest on the Group I Certificates is subject to reduction in
               the event of certain interest shortfalls allocable thereto. Any
               interest shortfalls shall be allocated among the Group I
               Certificates as described below;

               third, to the Class I-A-1, Class I-A-2 and Class A-R
               Certificates, pro rata, any Accrued Certificate Interest thereon
               remaining undistributed from previous Distribution Dates, to the
               extent of remaining Group I Available Funds, any shortfall in
               available amounts being allocated to the Group I Certificates in
               proportion to the amount of such Accrued Certificate Interest
               remaining undistributed for each class of Group I Certificates
               for such Distribution Date; and

               fourth, sequentially to the Class A-R Certificate until the Class
               Certificate Balance of such class has been reduced to zero and
               then to the Class I-A-1 and Class I-A-2 Certificates, pro rata,
               in reduction of their respective Class Certificate Balances, the
               Group I Senior Principal Distribution Amount for such
               Distribution Date to the extent of remaining Group I Available
               Funds, until the Class Certificate Balances of such classes have
               been reduced to zero.

          (B) On each Distribution Date, the Group II Available Funds will be
          distributed in the following order of priority among the Group II
          Certificates except as otherwise noted:


                                      -84-

<PAGE>

               first, to the Class P Certificates, any prepayment charges
               collected on the Mortgage Loans and (A) any amounts paid by the
               Sponsor or the related Servicer in respect of prepayment charges
               pursuant to this Agreement or the related Servicing Agreement and
               (B) any amounts received in respect of any indemnification paid
               as a result of a prepayment charges being unenforceable in breach
               of the representations and warranties set forth in the Mortgage
               Loan Purchase Agreement received during the related Prepayment
               Period;

               second, to the Class II-A-1 and Class II-A-2 Certificates, pro
               rata, the Accrued Certificate Interest for such Distribution
               Date. As described below, Accrued Certificate Interest on the
               Group II Certificates is subject to reduction in the event of
               certain interest shortfalls allocable thereto. Any interest
               shortfalls shall be allocated among the Group II Certificates as
               described below;

               third, to the Class II-A-1 and Class II-A-2 Certificates, pro
               rata, any Accrued Certificate Interest thereon remaining
               undistributed from previous Distribution Dates, to the extent of
               remaining Group II Available Funds, any shortfall in available
               amounts being allocated to the Group II Certificates in
               proportion to the amount of such Accrued Certificate Interest
               remaining undistributed for each class of Group II Certificates
               for such Distribution Date; and

               fourth, to the Class II-A-1 and Class II-A-2 Certificates, pro
               rata, in reduction of their respective Class Certificate
               Balances, the Group II Senior Principal Distribution Amount for
               such Distribution Date to the extent of remaining Group II
               Available Funds, until the Class Certificate Balances of such
               classes have been reduced to zero.

          (C) On each Distribution Date on or prior to the Credit Support
          Depletion Date, an amount equal to the sum of the remaining Group I
          Available Funds and Group II Available Funds after the distributions
          in clauses (A) and (B) above and after any distributions required to
          be made pursuant to clauses (D) and (E) below, will be distributed
          sequentially, in the following order, to the Class M-1, Class M-2,
          Class M-3, Class B-1, Class B-2 and Class B-3 Certificates, in each
          case up to an amount equal to and in the following order: (a) the
          Accrued Certificate Interest thereon for such Distribution Date, (b)
          any Accrued Certificate Interest thereon remaining undistributed from
          previous Distribution Dates and (c) such Class's Subordinate Principal
          Distribution Amount for such Distribution Date, in each case to the
          extent of the remaining Available Funds.

          (D) On each Distribution Date prior to the Credit Support Depletion
          Date but after the reduction of the aggregate Class Certificate
          Balance of the related Senior Certificates of a related Loan Group to
          zero, the remaining Class or Classes of related Senior Certificates
          will be entitled to receive in reduction of their Class Certificate
          Balances, pro rata, based upon their respective Class Certificate


                                      -85-

<PAGE>

          Balances immediately prior to such Distribution Date, in addition to
          any Principal Prepayments related to such remaining Senior
          Certificates' respective Loan Group allocated to such Senior
          Certificates, 100% of the Principal Prepayments on any Mortgage Loan
          in the Loan Group relating to the fully repaid Class or Classes of
          Senior Certificates; provided, however, that if both (a) the weighted
          average of the Subordinate Percentage equals or exceeds 200% of the
          original weighted average of the Subordinate Percentage as of the
          Closing Date on or after the Distribution Date in April 2010 and (b)
          the aggregate Stated Principal Balance of the Mortgage Loans
          delinquent 60 days or more, averaged over the last six months, as a
          percentage of the aggregate Class Certificate Balance of the Class M
          Certificates and Class B Certificates, does not exceed 50%, then the
          additional allocation of Principal Prepayments to the Senior
          Certificates in accordance with this clause (H) will not be made and
          100% of the Principal Prepayments on any Mortgage Loan in the Loan
          Group relating to the fully repaid class or classes of Senior
          Certificates will be allocated to the Subordinate Certificates.

          (E) If on any Distribution Date on which the aggregate Class
          Certificate Balance of any Class or Classes of Senior Certificates
          would be greater than the aggregate Stated Principal Balance of the
          Mortgage Loans in its related Loan Group (the amount of such excess,
          the "Undercollateralized Amount," and any such Class or Classes of
          Senior Certificates, the "Undercollateralized Senior Certificates")
          and any Subordinate Certificates are still outstanding in each case
          after giving effect to distributions to be made on such Distribution
          Date, (i) 100% of amounts otherwise allocable to the Subordinate
          Certificates in respect of principal will be distributed to the
          Undercollateralized Senior Certificates in reduction of the Class
          Certificate Balances thereof, until the aggregate Class Certificate
          Balance of such Class or Classes of Undercollateralized Senior
          Certificates is equal to the aggregate Stated Principal Balance of the
          Mortgage Loans in its related Loan Group, and (ii) the Accrued
          Certificate Interest otherwise allocable to the Subordinate
          Certificates on such Distribution Date will be reduced, if necessary,
          and distributed to such Class or Classes of Undercollateralized Senior
          Certificates pursuant to clause second of clauses (A) and (B) above,
          as applicable, in an amount equal to the Accrued Certificate Interest
          at the Pass-Through Rate for such Class or Classes of
          Undercollateralized Senior Certificates for such Distribution Date on
          a balance equal to the related Undercollateralized Amount. Any such
          reduction in the Accrued Certificate Interest on the Subordinate
          Certificates will be allocated to the Class B-3, Class B-2, Class B-1,
          Class M-3, Class M-2 and Class M-1 Certificates, in that order.

     On each Distribution Date, any Available Funds remaining after payment of
interest and principal to the Classes of Certificates entitled thereto, as
described above, will be distributed to the Class A-R Certificates; provided
that if on any Distribution Date on and after the Credit Support Depletion Date
there are any Group I or Group II Available Funds remaining after payment of
interest and principal to a Class or Classes of Senior Certificates entitled
thereto, such amounts will be distributed to the other Classes of Senior
Certificates, pro rata, based upon their Class Certificate Balances, until all
amounts due to all Classes of Senior Certificates have been paid in full, before
any amounts are distributed to the Class A-R Certificates.


                                      -86-

<PAGE>

     In addition to the foregoing distributions, with respect to any Subsequent
Recoveries, the Master Servicer shall deposit such amounts into the Master
Servicer Collection Account pursuant to Section 4.01(a). If, after taking into
account such Subsequent Recoveries, the amount of a Realized Loss is reduced,
the amount of such Subsequent Recoveries will be applied to increase the Class
Certificate Balance of the Class of Subordinate Certificates with the highest
payment priority to which Realized Losses have been allocated, including any
Class of Subordinate Certificates to which a Realized Loss was previously
allocated and whose Class Certificate Balance has been reduced to zero, but not
by more than the amount of Realized Losses previously allocated to that Class of
Certificates pursuant to Section 6.02. The amount of any remaining Subsequent
Recoveries will be applied to increase the Class Certificate Balance of the
Class of Certificates with the next highest payment priority, up to the amount
of such Realized Losses previously allocated to that Class of Certificates
pursuant to Section 6.02, and so on. Holders of such Certificates will not be
entitled to any payment in respect of Accrued Certificate Interest on the amount
of such increases for any Interest Accrual Period preceding the Distribution
Date on which such increase occurs. Any such increases shall be applied to the
Class Certificate Balance of each Certificate of such Class in accordance with
its respective Percentage Interest.

     Section 6.02 Allocation of Losses.

     (a) On or prior to each Determination Date, the Securities Administrator
shall determine the amount of any Realized Loss in respect of each Mortgage Loan
that occurred during the immediately preceding calendar month.

     (b) With respect to any Certificates on any Distribution Date, the
principal portion of each Realized Loss on a Mortgage Loan shall be allocated as
follows:

          first, to the Class B-3 Certificates until the Class Certificate
     Balance thereof has been reduced to zero;

          second, to the Class B-2 Certificates until the Class Certificate
     Balance thereof has been reduced to zero;

          third, to the Class B-1 Certificates until the Class Certificate
     Balance thereof has been reduced to zero;

          fourth, to the Class M-3 Certificates until the Class Certificate
     Balance thereof has been reduced to zero;

          fifth, to the Class M-2 Certificates until the Class Certificate
     Balance thereof has been reduced to zero;

          sixth, to the Class M-1 Certificates until the Class Certificate
     Balance thereof has been reduced to zero;

          seventh, if the Realized Loss occurs on a Mortgage Loan in a Loan
     Group where the aggregate Stated Principal Balance of the Mortgage Loans in
     such Loan Group is greater than the aggregate Class Certificate Balance of
     the related Senior Certificates, the


                                      -87-

<PAGE>

     Realized Loss will be allocated to any Senior Certificates related to a
     Loan Group where the aggregate Stated Principal Balance of the Mortgage
     Loans in such Loan Group is less than the aggregate Class Certificate
     Balance of the related Senior Certificates (any such amount, the
     "Deficiency Amount"), pro rata, based on the respective Deficiency Amount,
     in each case until the amount by which the aggregate Stated Principal
     Balance of the Mortgage Loans in the Loan Group in which the Realized Loss
     occurs exceeds the aggregate Class Certificate Balance of the related
     Senior Certificates until the Class Certificate Balances of such Senior
     Certificates have been reduced to zero; and

          eighth, to the Senior Certificates related to the Loan Group in which
     the Realized Loss occurred, until the Class Certificate Balances thereof
     have been reduced to zero.

          Notwithstanding the foregoing, any portion of any Realized Loss that
     would otherwise be allocated to the Class I-A-1 Certificates will instead
     be allocated first to the Class I-A-2 Certificates until the Class
     Certificate Balance thereof has been reduced to zero and any portion of any
     Realized Loss that would otherwise be allocated to the Class II-A-1
     Certificates will instead be allocated first to the Class II-A-2
     Certificates until the Class Certificate Balance thereof has been reduced
     to zero.

     (c) Notwithstanding the other provisions of Section 6.02, the first $0.66
of Realized Losses shall not be allocated to any Class of Certificates.

     Section 6.03 Payments.

     (a) On each Distribution Date, other than the final Distribution Date, the
Securities Administrator shall distribute to each Certificateholder of record on
the directly preceding Record Date the Certificateholder's pro rata share of its
Class (based on the aggregate Percentage Interest represented by such Holder's
Certificates) of all amounts required to be distributed on such Distribution
Date to such Class, based solely on information provided to the Securities
Administrator by the Master Servicer. The Securities Administrator shall
calculate the amount to be distributed to each Class and, based on such amounts,
the Securities Administrator shall determine the amount to be distributed to
each Certificateholder. All of the Securities Administrator's calculations of
payments shall be based solely on information provided to the Securities
Administrator by the Master Servicer or the applicable Servicer. The Securities
Administrator shall not be required to confirm, verify or recompute any such
information but shall be entitled to rely conclusively on such information.

     (b) Payment of the above amounts to each Certificateholder shall be made
(i) by check mailed to each Certificateholder entitled thereto at the address
appearing in the Certificate Register or (ii) upon receipt by the Securities
Administrator on or before the fifth Business Day preceding the Record Date of
written instructions from a Certificateholder by wire transfer to a United
States dollar account maintained by the payee at any United States depository
institution with appropriate facilities for receiving such a wire transfer;
provided, however, that the final payment in respect of each Class of
Certificates will be made only upon presentation and surrender of such
respective Certificates at the office or agency of the Securities Administrator
specified in the notice to Certificateholders of such final payment.


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<PAGE>

     Section 6.04 Statements to Certificateholders.

     (a) Concurrently with each distribution to Certificateholders, the
Securities Administrator shall make available to the parties hereto and each
Certificateholder via the Securities Administrator's internet website as set
forth below, the following information (such information the "Monthly
Statement"):

          (i) the amount of the distribution made on such Distribution Date to
     the Holders of each Class of Certificates, separately identified, allocable
     to principal;

          (ii) the amount of the distribution made on such Distribution Date to
     the Holders of each Class of Certificates allocable to interest, separately
     identified;

          (iii) the aggregate amount the Servicing Fee during the related Due
     Period and such other customary information as the Securities Administrator
     deems necessary or desirable, or which a Certificateholder reasonably
     requests, to enable Certificateholders to prepare their tax returns;

          (iv) the aggregate amount of Monthly Advances for the related Due
     Period;

          (v) the aggregate Stated Principal Balance of the Group I Mortgage
     Loans and Group II Mortgage Loans at the close of business at the end of
     the related Due Period;

          (vi) the number, weighted average remaining term to maturity and
     weighted average Mortgage Interest Rate of Group I Mortgage Loans and the
     Group II Mortgage Loans as of the related Due Date;

          (vii) the number and aggregate unpaid principal balance of Group I
     Mortgage Loans and Group II Mortgage Loans (a) one month, two months or
     three months delinquent on a contractual basis, (b) as to which foreclosure
     proceedings have been commenced and (c) in bankruptcy as of the close of
     business on the last day of the calendar month preceding such Distribution
     Date determined in accordance with the MBA method;

          (viii) with respect to any Group I Mortgage Loan or Group II Mortgage
     Loan that became an REO Property during the preceding calendar month, the
     Stated Principal Balance of such Group I Mortgage Loan or Group II Mortgage
     Loan as of the date it became an REO Property;

          (ix) the book value of any REO Property as of the close of business on
     the last Business Day of the calendar month preceding the Distribution
     Date, and, cumulatively, the total number and cumulative principal balance
     of all REO Properties as of the close of business of the last day of the
     preceding due period;

          (x) the aggregate amount of Principal Prepayments made during the
     related Prepayment Period;


                                      -89-

<PAGE>

          (xi) the number and amount of Prepayment Penalties received during the
     related Prepayment Period in the aggregate.

          (xii) the aggregate amount of Realized Losses incurred during the
     related Due Period and the cumulative amount of Realized Losses;

          (xiii) the aggregate amount of Extraordinary Trust Fund Expenses
     withdrawn from the Master Servicer Collection Account for such Distribution
     Date;

          (xiv) the Class Certificate Balance of each Class of Certificates,
     after giving effect to the distributions made on such Distribution Date;

          (xv) the aggregate amount of interest accrued at the related
     Pass-Through Rate with respect to each Class during the related Interest
     Accrual Period and the respective portions thereof, if any, remaining
     unpaid following the distributions made in respect of such Certificates on
     such Distribution Date;

          (xvi) the aggregate amount of any Prepayment Interest Shortfalls for
     such Distribution Date as determined separately for each Loan Group, to the
     extent not covered by Compensating Interest Payments by the related
     Servicer or the Master Servicer pursuant to the related Servicing Agreement
     or Section 6.06;

          (xvii) the Group I Available Funds and Group II Available Funds;

          (xviii) the Pass-Through Rate for each Class of Certificates for such
     Distribution Date; and

          (xix) the aggregate Stated Principal Balance of Group I Mortgage Loans
     and Group II Mortgage Loans purchased by the Seller during the related Due
     Period and indicating the Section of this Agreement requiring or allowing
     the purchase of each such Group I Mortgage Loan and Group II Mortgage Loan.

     The information set forth above shall be calculated or reported, as the
case may be, by the Securities Administrator, based solely on, and to the extent
of, information provided to the Securities Administrator by the Master Servicer.
The Securities Administrator may conclusively rely on such information and shall
not be required to confirm, verify or recalculate any such information.

     The Securities Administrator may make available each month, to any
interested party, the Monthly Statement to Certificateholders via the Securities
Administrator's website initially located at "www.ctslink.com." Assistance in
using the website can be obtained by calling the Securities Administrator's
customer service desk at (301) 815-6600. Parties that are unable to use the
above distribution option are entitled to have a paper copy mailed to them via
first class mail by calling the customer service desk and indicating such. The
Securities Administrator shall have the right to change the way such reports are
distributed in order to make such distribution more convenient and/or more
accessible to the parties, and the Securities Administrator shall provide timely
and adequate notification to all parties regarding any such change.


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<PAGE>

     (b) By January 30 of each year beginning in 2008, if so requested in
writing, the Securities Administrator will furnish such report to each Holder of
the Certificates of record at any time during the prior calendar year as to the
aggregate of amounts reported pursuant to subclauses (a)(ii) and (a)(v) above
with respect to the Certificates, plus information with respect to the amount of
servicing compensation and such other customary information as the Securities
Administrator may determine to be necessary and/or to be required by the
Internal Revenue Service or by a federal or state law or rules or regulations to
enable such Holders to prepare their tax returns for such calendar year. Such
obligations shall be deemed to have been satisfied to the extent that
substantially comparable information shall be provided by the Securities
Administrator pursuant to the requirements of the Code.

     Section 6.05 Monthly Advances. If the Monthly Payment on a Mortgage Loan
that was due on a related Due Date and is delinquent other than as a result of
application of the Relief Act and for which the related Servicer was required to
make an advance pursuant to the related Servicing Agreement exceeds the amount
deposited in the Master Servicer Collection Account that will be used for a
Monthly Advance with respect to such Mortgage Loan, the Master Servicer will
deposit in the Master Servicer Collection Account not later than the
Distribution Account Deposit Date immediately preceding the related Distribution
Date an amount equal to such deficiency, net of the Servicing Fee for such
Mortgage Loan, except to the extent the Master Servicer determines any such
Monthly Advance to be nonrecoverable from Liquidation Proceeds, Insurance
Proceeds or future payments on the Mortgage Loan for which such Monthly Advance
was made. If the Master Servicer has not deposited the amount described above as
of the related Distribution Account Deposit Date, the Trustee will, subject to
applicable law and its determination of recoverability, deposit in the Master
Servicer Collection Account not later than the related Distribution Date, an
amount equal to the remaining deficiency as of the Distribution Account Deposit
Date. Subject to the foregoing, the Master Servicer shall continue to make such
Monthly Advances through the date that the related Servicer is required to do so
under its Servicing Agreement. If applicable, on the Distribution Account
Deposit Date, the Master Servicer shall present an Officer's Certificate to the
Securities Administrator (i) stating that the Master Servicer elects not to make
a Monthly Advance in a stated amount and (ii) detailing the reason it deems the
advance to be nonrecoverable.

     Section 6.06 Compensating Interest Payments. The Master Servicer shall
deposit in the Master Servicer Collection Account not later than each
Distribution Account Deposit Date an amount equal to the aggregate amounts
required to be paid by the Servicers under the Servicing Agreements with respect
to subclause (a) of the definition of Prepayment Interest Shortfall with respect
to the Mortgage Loans for the related Distribution Date, and not so paid by the
related Servicers (such amount, the "Compensating Interest Payment"). The Master
Servicer shall not be entitled to any reimbursement of any Compensating Interest
Payment; provided, however, the aggregate compensating interest payments made by
the Master Servicer shall not exceed the Master Servicing Compensation.


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<PAGE>

                                   ARTICLE VII
                      THE MASTER SERVICER AND THE DEPOSITOR

     Section 7.01 Liabilities of the Master Servicer. The Master Servicer shall
be liable in accordance herewith only to the extent of the obligations
specifically imposed upon and undertaken by the Master Servicer, as the case may
be, herein. The Depositor shall be liable in accordance herewith only to the
extent of the obligations specifically imposed upon and undertaken by the
Depositor.

     Section 7.02 Merger or Consolidation of the Master Servicer.

     (a) Each of the Master Servicer and the Depositor will keep in full force
and effect its existence, rights and franchises as a corporation under the laws
of the state of its incorporation, and will obtain and preserve its
qualification to do business as a foreign corporation in each jurisdiction in
which such qualification is or shall be necessary to protect the validity and
enforceability of this Agreement, the Certificates or any of the Mortgage Loans
and to perform its duties under this Agreement.

     (b) Any Person into which the Master Servicer or the Depositor may be
merged or consolidated, or any corporation resulting from any merger or
consolidation to which the Master Servicer shall be a party, or any Person
succeeding to the business of the Master Servicer, shall be the successor of the
Master Servicer hereunder, without the execution or filing of any paper or
further act on the part of any of the parties hereto, anything herein to the
contrary notwithstanding.

     Section 7.03 Indemnification from the Master Servicer and the Depositor.

     (a) The Master Servicer agrees to indemnify the Indemnified Persons for,
and to hold them harmless against, any loss, liability or expense (including
reasonable legal fees and disbursements of counsel) incurred on their part that
may be sustained in connection with, arising out of, or relating to, any claim
or legal action (including any pending or threatened claim or legal action)
relating to this Agreement or the Certificates (i) related to the Master
Servicer's failure to perform its duties in compliance with this Agreement
(except as any such loss, liability or expense shall be otherwise reimbursable
pursuant to this Agreement) or (ii) incurred by reason of the Master Servicer's
willful misfeasance, bad faith or gross negligence in the performance of duties
hereunder or by reason of reckless disregard of obligations and duties
hereunder, provided, in each case, that with respect to any such claim or legal
action (or pending or threatened claim or legal action), the Trustee or the
Securities Administrator shall have given the Master Servicer and the Depositor
written notice of such claim or legal action promptly after the Trustee or the
Securities Administrator shall have received knowledge thereof. This indemnity
shall survive the resignation or removal of the Trustee, Master Servicer or the
Securities Administrator and the termination of this Agreement.

     (b) The Depositor will indemnify any Indemnified Person for any loss,
liability or expense of any Indemnified Person not otherwise referred to in
Subsection (a) above.


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<PAGE>

     Section 7.04 Limitations on Liability of the Master Servicer and Others.
Subject to the obligation of the Master Servicer to indemnify the Indemnified
Persons pursuant to Section 7.03:

     (a) Neither the Master Servicer nor any of the directors, officers,
employees or agents of the Master Servicer shall be under any liability to the
Indemnified Persons, the Depositor, the Issuing Entity or the Certificateholders
for taking any action or for refraining from taking any action in good faith
pursuant to this Agreement, or for errors in judgment; provided, however, that
this provision shall not protect the Master Servicer or any such Person against
any breach of warranties or representations made herein or any liability which
would otherwise be imposed by reason of such Person's willful misfeasance, bad
faith or gross negligence in the performance of duties or by reason of reckless
disregard of obligations and duties hereunder.

     (b) The Master Servicer and any director, officer, employee or agent of the
Master Servicer may rely in good faith on any document of any kind prima facie
properly executed and submitted by any Person respecting any matters arising
hereunder.

     (c) The Master Servicer, the Custodian and any director, officer, employee
or agent of the Master Servicer or the Custodian shall be indemnified by the
Issuing Entity and held harmless thereby against any loss, liability or expense
(including reasonable legal fees and disbursements of counsel) incurred on their
part that may be sustained in connection with, arising out of, or related to,
any claim or legal action (including any pending or threatened claim or legal
action) relating to this Agreement, the Certificates or any Servicing Agreement
(except to the extent that the Master Servicer or the Custodian, as the case may
be, is indemnified by a Servicer thereunder), other than (i) any such loss,
liability or expense related to the Master Servicer's failure to perform its
duties in compliance with this Agreement (except as any such loss, liability or
expense shall be otherwise reimbursable pursuant to this Agreement), or to the
Custodian's failure to perform its duties under the Custodial Agreement,
respectively, or (ii) any such loss, liability or expense incurred by reason of
the Master Servicer's or the Custodian's willful misfeasance, bad faith or gross
negligence in the performance of duties hereunder or under the Custodial
Agreement, as applicable, or by reason of reckless disregard of obligations and
duties hereunder or under the Custodial Agreement, as applicable.

     (d) The Master Servicer shall not be under any obligation to appear in,
prosecute or defend any legal action that is not incidental to its duties under
this Agreement and that in its opinion may involve it in any expense or
liability; provided, however, the Master Servicer may in its discretion,
undertake any such action which it may deem necessary or desirable with respect
to this Agreement and the rights and duties of the parties hereto and the
interests of the Certificateholders hereunder. In such event, the legal expenses
and costs of such action and any liability resulting therefrom shall be
expenses, costs and liabilities of the Issuing Entity, and the Master Servicer
shall be entitled to be reimbursed therefor out of the Master Servicer
Collection Account as provided by Section 4.03. Nothing in this Subsection
7.04(d) shall affect the Master Servicer's obligation to supervise, or to take
such actions as are necessary to ensure, the servicing and administration of the
Mortgage Loans pursuant to Subsection 3.01(a).

     (e) In taking or recommending any course of action pursuant to this
Agreement, unless specifically required to do so pursuant to this Agreement, the
Master Servicer shall not be required to investigate or make recommendations
concerning potential liabilities which the


                                      -93-

<PAGE>

Issuing Entity might incur as a result of such course of action by reason of the
condition of the Mortgaged Properties.

     (f) The Master Servicer shall not be liable for any acts or omissions of
any Servicer, except as otherwise expressly provided herein.

     Section 7.05 Master Servicer Not to Resign. Except as provided in Section
7.07, the Master Servicer shall not resign from the obligations and duties
hereby imposed on it except upon a determination that any such duties hereunder
are no longer permissible under applicable law and such impermissibility cannot
be cured. Any such determination permitting the resignation of the Master
Servicer shall be evidenced by an Opinion of Independent Counsel to such effect
delivered to the Trustee. No such resignation by the Master Servicer shall
become effective until MLML or the Trustee or a successor to the Master Servicer
reasonably satisfactory to the Trustee shall have assumed the responsibilities
and obligations of the Master Servicer in accordance with Section 8.02 hereof.
The Trustee shall notify the Rating Agencies of the resignation of the Master
Servicer. If the Master Servicer and the Securities Administrator are the same
entity, then at any time the Master Servicer is terminated as master servicer,
the Securities Administrator shall likewise be removed as securities
administrator.

     Section 7.06 Successor Master Servicer. In connection with the appointment
of any successor Master Servicer or the assumption of the duties of the Master
Servicer, MLML or the Trustee may make such arrangements for the compensation of
such successor master servicer out of payments on the Mortgage Loans as MLML or
the Trustee and such successor master servicer shall agree. If the successor
master servicer does not agree that such market value is a fair price, such
successor master servicer shall obtain two quotations of market value from third
parties actively engaged in the servicing of single-family mortgage loans.

          Notwithstanding anything herein to the contrary, in no event shall the
Trustee be liable for any Servicing Fee or master servicing fee or for any
differential in the amount of the Servicing Fee or master servicing fee paid
hereunder and the amount necessary to induce any successor servicer or successor
master servicer to act as successor servicer or successor master servicer, as
applicable, under this Agreement and the transactions set forth or provided for
herein.

     Section 7.07 Sale and Assignment of Master Servicing. The Master Servicer
may sell and assign its rights and delegate its duties and obligations in its
entirety as Master Servicer under this Agreement; provided, however, that: (i)
the purchaser or transferee accepting such assignment and delegation (a) shall
be a Person which shall be qualified to service mortgage loans for Fannie Mae or
Freddie Mac; (b) shall have a net worth of not less than $10,000,000 (unless
otherwise approved by each Rating Agency pursuant to clause (ii) below); (c)
shall be reasonably satisfactory to the Trustee (as evidenced in a writing
signed by the Trustee); and (d) shall execute and deliver to the Trustee an
agreement, in form and substance reasonably satisfactory to the Trustee, which
contains an assumption by such Person of the due and punctual performance and
observance of each covenant and condition to be performed or observed by it as
master servicer under this Agreement, any custodial agreement from and after the
effective date of such agreement; (ii) each Rating Agency shall be given prior
written notice of the identity of the proposed successor to the Master Servicer
and each Rating Agency's rating of the Certificates


                                      -94-

<PAGE>

in effect immediately prior to such assignment, sale and delegation will not be
downgraded, qualified or withdrawn as a result of such assignment, sale and
delegation, as evidenced by a letter to such effect delivered to the Master
Servicer and the Trustee; and (iii) the Master Servicer assigning and selling
the master servicing shall deliver to the Trustee an Officer's Certificate and
an Opinion of Independent Counsel, each stating that all conditions precedent to
such action under this Agreement have been completed and such action is
permitted by and complies with the terms of this Agreement. No such assignment
or delegation shall affect any liability of the Master Servicer arising prior to
the effective date thereof.

                                  ARTICLE VIII
                                     DEFAULT

     Section 8.01 Events of Default. "Event of Default," wherever used herein,
means any one of the following events (whatever the reason for such Event of
Default and whether it shall be voluntary or involuntary or be effected by
operation of law or pursuant to any judgment, decree or order of any court or
any order, rule or regulation of any administrative or governmental body) and
only with respect to the defaulting Master Servicer:

          (i) The Master Servicer fails to cause to be deposited in the
     Distribution Account any amount so required to be deposited pursuant to
     this Agreement, and such failure continues unremedied for a period of three
     Business Days after the date upon which written notice of such failure,
     requiring the same to be remedied, shall have been given to the Master
     Servicer; or

          (ii) The Master Servicer fails to observe or perform in any material
     respect any other material covenants and agreements set forth in this
     Agreement to be performed by it, which covenants and agreements materially
     affect the rights of Certificateholders, and such failure continues
     unremedied for a period of 60 days after the date on which written notice
     of such failure, properly requiring the same to be remedied, shall have
     been given to the Master Servicer by the Trustee or to the Master Servicer
     and the Trustee by the Holders of Certificates evidencing Percentage
     Interests aggregating not less than 25% of the Trust Fund; or

          (iii) There is entered against the Master Servicer a decree or order
     by a court or agency or supervisory authority having jurisdiction in the
     premises for the appointment of a conservator, receiver or liquidator in
     any insolvency, readjustment of debt, marshaling of assets and liabilities
     or similar proceedings, or for the winding up or liquidation of its
     affairs, and the continuance of any such decree or order is unstayed and in
     effect for a period of 60 consecutive days, or an involuntary case is
     commenced against the Master Servicer under any applicable insolvency or
     reorganization statute and the petition is not dismissed within 60 days
     after the commencement of the case; or

          (iv) The Master Servicer consents to the appointment of a conservator
     or receiver or liquidator in any insolvency, readjustment of debt,
     marshaling of assets and liabilities or similar proceedings of or relating
     to the Master Servicer or substantially all of its property; or the Master
     Servicer admits in writing its inability to pay its debts generally as they
     become due, files a petition to take advantage of any applicable


                                      -95-

<PAGE>

     insolvency or reorganization statute, makes an assignment for the benefit
     of its creditors, or voluntarily suspends payment of its obligations; or

          (v) The Master Servicer assigns or delegates its duties or rights
     under this Agreement in contravention of the provisions permitting such
     assignment or delegation under Sections 7.05 or 7.07.

In each and every such case, so long as such Event of Default with respect to
the Master Servicer shall not have been remedied, either the Trustee or the
Holders of Certificates evidencing Percentage Interests aggregating not less
than 51% of the principal of the Trust Fund, by notice in writing to the Master
Servicer (and to the Trustee if given by such Certificateholders), with a copy
to the Rating Agencies, and with the consent of MLML, may terminate all of the
rights and obligations (but not the liabilities) of the Master Servicer under
this Agreement and in and to the Mortgage Loans and/or the REO Property serviced
by the Master Servicer and the proceeds thereof. Upon the receipt by the Master
Servicer of the written notice, all authority and power of the Master Servicer
under this Agreement, whether with respect to the Certificates, the Mortgage
Loans, REO Property or under any other related agreements (but only to the
extent that such other agreements relate to the Mortgage Loans or related REO
Property) shall, subject to Section 8.02, automatically and without further
action pass to and be vested in the Trustee pursuant to this Section 8.01; and,
without limitation, the Trustee is hereby authorized and empowered to execute
and deliver, on behalf of the Master Servicer as attorney-in-fact or otherwise,
any and all documents and other instruments and to do or accomplish all other
acts or things necessary or appropriate to effect the purposes of such notice of
termination, whether to complete the transfer and endorsement or assignment of
the Mortgage Loans and related documents, or otherwise. The Master Servicer
agrees to cooperate with the Trustee in effecting the termination of the Master
Servicer's rights and obligations hereunder, including, without limitation, the
transfer to the Trustee of (i) the property and amounts which are then or should
be part of the Issuing Entity or which thereafter become part of the Issuing
Entity; and (ii) originals or copies of all documents of the Master Servicer
reasonably requested by the Trustee to enable it to assume the Master Servicer's
duties thereunder. In addition to any other amounts which are then, or,
notwithstanding the termination of its activities under this Agreement, may
become payable to the Master Servicer under this Agreement, the Master Servicer
shall be entitled to receive, out of any amount received on account of a
Mortgage Loan or related REO Property, that portion of such payments which it
would have received as reimbursement under this Agreement if notice of
termination had not been given. The termination of the rights and obligations of
the Master Servicer shall not affect any obligations incurred by the Master
Servicer prior to such termination.

     Section 8.02 Trustee to Act; Appointment of Successor.

     (a) Upon the receipt by the Master Servicer of a notice of termination
pursuant to Section 8.01 or an Opinion of Independent Counsel pursuant to
Section 7.05 to the effect that the Master Servicer is legally unable to act or
to delegate its duties to a Person which is legally able to act, the Trustee
shall automatically become the successor in all respects to the Master Servicer
in its capacity under this Agreement and the transactions set forth or provided
for herein and shall thereafter be subject to all the responsibilities, duties,
liabilities and limitations on liabilities relating thereto placed on the Master
Servicer by the terms and provisions hereof; provided,


                                      -96-

<PAGE>

however, that MLML shall have the right to either (a) immediately assume the
duties of the Master Servicer or (b) select a successor master servicer;
provided further, however, that the Trustee shall have no obligation whatsoever
with respect to any liability (other than advances deemed recoverable and not
previously made) incurred by the Master Servicer at or prior to the time of
termination. As compensation therefor, the Trustee shall be entitled to all
funds relating to the Mortgage Loans which the Master Servicer would have been
entitled to retain if the Master Servicer had continued to act hereunder, except
for those amounts due the Master Servicer as reimbursement permitted under this
Agreement for advances previously made or expenses previously incurred.
Notwithstanding the above, or anything herein to the contrary, the Trustee, if
it becomes Master Servicer, shall have no responsibility or obligation (i) to
repurchase or substitute any Mortgage Loan, (ii) for any representation or
warranty of the Master Servicer hereunder, and (iii) for any act or omission of
either a predecessor or successor Master Servicer other than the Trustee. The
Trustee may conduct any activity required of it as Master Servicer hereunder
through an Affiliate or through an agent. Neither the Trustee (as successor
Master Servicer) nor any other successor Master Servicer shall be deemed to be
in default hereunder due to any act or omission of a predecessor Master
Servicer, including but not limited to failure to timely deliver to the Trustee
distribution instructions, any funds required to be deposited to the Trust Fund,
or any breach of its duty to cooperate with a transfer of master servicing.
Neither the Trustee nor any other successor Master Servicer shall be deemed to
be in default hereunder by reason of any failure to make, or any delay in
making, any distribution hereunder or any portion thereof or any failure to
perform, or any delay in performing, any duties or responsibilities hereunder,
in either case caused solely by the failure of the Master Servicer to deliver or
provide, or any delay in delivering or providing, any cash, information,
documents or records required to be provided to it by the Master Servicer.
Notwithstanding the above, the Trustee may, if it shall be unwilling so to act,
or shall, if it is legally unable so to act, appoint or petition a court of
competent jurisdiction to appoint, any established housing and home finance
institution which is a Fannie Mae- or Freddie Mac-approved servicer, and with
respect to a successor to the Master Servicer only, having a net worth of not
less than $10,000,000 and meeting such other standards for a successor Master
Servicer as are set forth in this Agreement, as the successor to the Master
Servicer hereunder in the assumption of all or any part of the responsibilities,
duties or liabilities of the Master Servicer hereunder. Pending appointment of a
successor to the Master Servicer hereunder, the Trustee shall act in such
capacity as hereinabove provided. In connection with such appointment and
assumption, the Trustee may make such arrangements for the compensation of such
successor out of payments on the Mortgage Loans as it and such successor shall
agree; provided, however, in the event that the provisions of Section 7.06 shall
apply, no such compensation shall be in excess of that permitted the Trustee
under this Subsection 8.02(a), and that such successor shall undertake and
assume the obligations of the Trustee to pay compensation to any third Person
acting as an agent or independent contractor in the performance of master
servicing responsibilities hereunder. The Trustee and such successor shall take
such action, consistent with this Agreement, as shall be necessary to effectuate
any such succession.

     (b) If the Trustee shall succeed to any duties of the Master Servicer
respecting the Mortgage Loans as provided herein, it shall do so in a separate
capacity and not in its capacity as Trustee and, accordingly, the provisions of
Article IX (with the exception of the last paragraph of Section 9.01(d)) shall
be inapplicable to the Trustee in its duties as the successor to the Master
Servicer in the servicing of the Mortgage Loans (although such provisions shall
continue to


                                      -97-

<PAGE>

apply to the Trustee in its capacity as Trustee); the provisions of Article VII,
however, shall apply to it in its capacity as successor master servicer.

     Section 8.03 Notification to Certificateholders. Upon any termination or
appointment of a successor to the Master Servicer, the Trustee shall give prompt
written notice thereof to Certificateholders at their respective addresses
appearing in the Certificate Register and to the Rating Agencies.

     Section 8.04 Waiver of Defaults. The Trustee shall transmit by mail to all
Certificateholders, within 60 days after the occurrence of any Event of Default
known to the Trustee, unless such Event of Default shall have been cured, notice
of each such Event of Default hereunder known to the Trustee. The Holders of
Certificates evidencing Percentage Interests aggregating not less than 51% of
the Trust Fund may, on behalf of all Certificateholders, waive any default by
the Master Servicer in the performance of its obligations hereunder and the
consequences thereof, except a default in the making of or the causing to be
made any required distribution on the Certificates. Upon any such waiver of a
past default, such default shall be deemed to cease to exist, and any Event of
Default arising therefrom shall be deemed to have been timely remedied for every
purpose of this Agreement. No such waiver shall extend to any subsequent or
other default or impair any right consequent thereon except to the extent
expressly so waived. The Trustee shall give notice of any such waiver to the
Rating Agencies.

     Section 8.05 List of Certificateholders. Upon reasonable, prior written
request of three or more Certificateholders of record, for purposes of
communicating with other Certificateholders with respect to their rights under
this Agreement, the Trustee will afford such Certificateholders access during
business hours to the most recent list of Certificateholders held by the
Trustee.

                                   ARTICLE IX
                           CONCERNING THE TRUSTEE AND
                          THE SECURITIES ADMINISTRATOR

     Section 9.01 Duties of Trustee.

     (a) The Trustee, prior to the occurrence of an Event of Default and after
the curing or waiver of all Events of Default which may have occurred, and the
Securities Administrator each undertake to perform such duties and only such
duties as are specifically set forth in this Agreement as duties of the Trustee
and the Securities Administrator, respectively. If an Event of Default has
occurred and has not been cured or waived, the Trustee shall exercise such of
the rights and powers vested in it by this Agreement, and subject to Section
8.02(b) use the same degree of care and skill in their exercise, as a prudent
person would exercise under the circumstances in the conduct of his own affairs.

     (b) Upon receipt of all resolutions, certificates, statements, opinions,
reports, documents, orders or other instruments which are specifically required
to be furnished to the Trustee and the Securities Administrator pursuant to any
provision of this Agreement, the Trustee and the Securities Administrator,
respectively, shall examine them to determine whether


                                      -98-

<PAGE>

they are in the form required by this Agreement; provided, however, that neither
the Trustee nor the Securities Administrator shall be responsible for the
accuracy or content of any resolution, certificate, statement, opinion, report,
document, order or other instrument furnished by the Master Servicer; provided,
further, that neither the Trustee nor the Securities Administrator shall be
responsible for the accuracy or verification of any calculation provided to it
pursuant to this Agreement. If any such instrument is found not to conform to
the requirements of this Agreement in a material manner, the Trustee shall take
such action as it deems appropriate to have the instrument corrected and if the
instrument is not corrected to its satisfaction, the Trustee will provide notice
thereof to the Certificateholders and take such further action as directed by
the Certificateholders.

     (c) On each Distribution Date, the Securities Administrator shall make
monthly distributions and the final distribution to the Certificateholders from
funds in the Distribution Account as provided in Sections 6.01 and 10.01 herein
based solely on the report of the Master Servicer or the Servicers.

     (d) No provision of this Agreement shall be construed to relieve the
Trustee or the Securities Administrator from liability for its own negligent
action, its own negligent failure to act or its own willful misconduct;
provided, however, that:

          (i) Prior to the occurrence of an Event of Default, and after the
     curing or waiver of all such Events of Default which may have occurred, the
     duties and obligations of the Trustee and the Securities Administrator
     shall be determined solely by the express provisions of this Agreement,
     neither the Trustee nor the Securities Administrator shall be liable except
     for the performance of their respective duties and obligations as are
     specifically set forth in this Agreement, no implied covenants or
     obligations shall be read into this Agreement against the Trustee or the
     Securities Administrator and, in the absence of bad faith on the part of
     the Trustee or the Securities Administrator, respectively, the Trustee or
     the Securities Administrator, respectively, may conclusively rely, as to
     the truth of the statements and the correctness of the opinions expressed
     therein, upon any certificates or opinions furnished to the Trustee or the
     Securities Administrator, respectively, and conforming to the requirements
     of this Agreement;

          (ii) Neither the Trustee nor the Securities Administrator shall be
     liable in its individual capacity for an error of judgment made in good
     faith by a Responsible Officer or Responsible Officers of the Trustee or an
     officer of the Securities Administrator, respectively, unless it shall be
     proved that the Trustee or the Securities Administrator, respectively, was
     negligent in ascertaining the pertinent facts;

          (iii) Neither the Trustee nor the Securities Administrator shall be
     liable with respect to any action taken, suffered or omitted to be taken by
     it in good faith in accordance with the directions of the Holders of
     Certificates evidencing Percentage Interests aggregating not less than 25%
     of the Trust Fund, if such action or non-action relates to the time, method
     and place of conducting any proceeding for any remedy available to the
     Trustee or the Securities Administrator, respectively, or exercising any
     trust or other power conferred upon the Trustee or the Securities
     Administrator, respectively, under this Agreement;


                                      -99-
<PAGE>

          (iv) The Trustee shall not be required to take notice or be deemed to
     have notice or knowledge of any default or Event of Default unless a
     Responsible Officer of the Trustee's Corporate Trust Office shall have
     actual knowledge thereof. In the absence of such notice, the Trustee may
     conclusively assume there is no such default or Event of Default;

          (v) The Trustee shall not in any way be liable by reason of any
     insufficiency in any Account held by or in the name of Trustee unless it is
     determined by a court of competent jurisdiction that the Trustee's gross
     negligence or willful misconduct was the primary cause of such
     insufficiency (except to the extent that the Trustee is obligor and has
     defaulted thereon);

          (vi) Anything in this Agreement to the contrary notwithstanding, in no
     event shall the Trustee or the Securities Administrator be liable for
     special, indirect or consequential loss or damage of any kind whatsoever
     (including but not limited to lost profits), even if the Trustee or the
     Securities Administrator, respectively, has been advised of the likelihood
     of such loss or damage and regardless of the form of action; and

          (vii) None of the Securities Administrator, the Depositor, the Master
     Servicer, any Servicer or the Trustee shall be responsible for the acts or
     omissions of the other, it being understood that this Agreement shall not
     be construed to render them partners, joint venturers or agents of one
     another.

     Neither the Trustee (regardless of the capacity in which it is acting) nor
the Securities Administrator shall be required to expend or risk its own funds
or otherwise incur financial liability in the performance of any of its duties
hereunder, or in the exercise of any of its rights or powers, if there is
reasonable ground for believing that the repayment of such funds or adequate
indemnity against such risk or liability is not reasonably assured to it, and
none of the provisions contained in this Agreement shall in any event require
the Trustee or the Securities Administrator to perform, or be responsible for
the manner of performance of, any of the obligations of the Master Servicer
hereunder or under the Servicing Agreements, except during such time, if any, as
the Trustee shall be the successor to, and be vested with the rights, duties,
powers and privileges of, the Master Servicer in accordance with the terms of
this Agreement.

     (e) All funds received by the Master Servicer and the Securities
Administrator and required to be deposited in the Master Servicer Collection
Account or Distribution Account pursuant to this Agreement will be promptly so
deposited by the Master Servicer and the Securities Administrator.

     (f) Except for those actions that the Trustee or the Securities
Administrator is required to take hereunder, neither the Trustee nor the
Securities Administrator shall have any obligation or liability to take any
action or to refrain from taking any action hereunder in the absence of written
direction as provided hereunder.


                                      -100-

<PAGE>

     Section 9.02 Certain Matters Affecting the Trustee and the Securities
Administrator. Except as otherwise provided in Section 9.01:

          (i) The Trustee and the Securities Administrator may rely and shall be
     protected in acting or refraining from acting in reliance on any
     resolution, certificate of a Depositor, Master Servicer or Servicer,
     certificate of auditors or any other certificate, statement, instrument,
     opinion, report, notice, request, consent, order, appraisal, bond or other
     paper or document believed by it to be genuine and to have been signed or
     presented by the proper party or parties;

          (ii) The Trustee and the Securities Administrator may consult with
     counsel and any advice of such counsel or any Opinion of Counsel shall be
     full and complete authorization and protection with respect to any action
     taken or suffered or omitted by it hereunder in good faith and in
     accordance with such advice or Opinion of Counsel;

          (iii) Neither the Trustee nor the Securities Administrator shall be
     under any obligation to exercise any of the trusts or powers vested in it
     by this Agreement, other than its obligation to give notices pursuant to
     this Agreement, or to institute, conduct or defend any litigation hereunder
     or in relation hereto at the request, order or direction of any of the
     Certificateholders pursuant to the provisions of this Agreement, unless
     such Certificateholders shall have offered to the Trustee reasonable
     security or indemnity against the costs, expenses and liabilities which may
     be incurred therein or thereby. Nothing contained herein shall, however,
     relieve the Trustee of the obligation, upon the occurrence of an Event of
     Default of which a Responsible Officer of the Trustee's Corporate Trust
     Office has actual knowledge (which has not been cured or waived), subject
     to Section 8.02(b), to exercise such of the rights and powers vested in it
     by this Agreement, and to use the same degree of care and skill in their
     exercise, as a prudent person would exercise under the circumstances in the
     conduct of his own affairs;

          (iv) Prior to the occurrence of an Event of Default hereunder and
     after the curing or waiver of all Events of Default which may have
     occurred, neither the Trustee nor the Securities Administrator shall be
     liable in its individual capacity for any action taken, suffered or omitted
     by it in good faith and believed by it to be authorized or within the
     discretion or rights or powers conferred upon it by this Agreement;

          (v) Neither the Trustee nor the Securities Administrator shall be
     bound to make any investigation into the facts or matters stated in any
     resolution, certificate, statement, instrument, opinion, report, notice,
     request, consent, order, approval, bond or other paper or document, unless
     requested in writing to do so by Holders of Certificates evidencing
     Percentage Interests aggregating not less than 25% of the Trust Fund and
     provided that the payment within a reasonable time to the Trustee or the
     Securities Administrator, as applicable, of the costs, expenses or
     liabilities likely to be incurred by it in the making of such investigation
     is, in the opinion of the Trustee or the Securities Administrator, as
     applicable, reasonably assured to the Trustee or the Securities
     Administrator, as applicable, by the security afforded to it by the terms
     of this Agreement. The Trustee or the Securities Administrator may require
     reasonable indemnity against such expense or liability as a condition to
     taking any such action. The


                                      -101-

<PAGE>

     reasonable expense of every such examination shall be paid by the
     Certificateholders requesting the investigation;

          (vi) The Trustee and the Securities Administrator may execute any of
     the trusts or powers hereunder or perform any duties hereunder either
     directly or through Affiliates, agents or attorneys; provided, however,
     that the Trustee may not appoint any agent to perform its custodial
     functions with respect to the Mortgage Files or paying agent functions
     under this Agreement without the express written consent of the Securities
     Administrator, which consent will not be unreasonably withheld. Neither the
     Trustee nor the Securities Administrator shall be liable or responsible for
     the misconduct or negligence of any of the Trustee's or the Securities
     Administrator's agents or attorneys or a custodian or paying agent
     appointed hereunder by the Trustee or the Securities Administrator with due
     care and, when required, with the consent of the Securities Administrator;

          (vii) Should the Trustee or the Securities Administrator deem the
     nature of any action required on its part, other than a payment or transfer
     under Subsection 4.01(b) or Section 4.02, to be unclear, the Trustee or the
     Securities Administrator, respectively, may require prior to such action
     that it be provided by the Depositor with reasonable further instructions;

          (viii) The right of the Trustee or the Securities Administrator to
     perform any discretionary act enumerated in this Agreement shall not be
     construed as a duty, and neither the Trustee nor the Securities
     Administrator shall be accountable for other than its negligence or willful
     misconduct in the performance of any such act;

          (ix) Neither the Trustee nor the Securities Administrator shall be
     required to give any bond or surety with respect to the execution of the
     trust created hereby or the powers granted hereunder, except as provided in
     Subsection 9.07; and

          (x) Neither the Trustee nor the Securities Administrator shall have
     any duty to conduct any affirmative investigation as to the occurrence of
     any condition requiring the repurchase of any Mortgage Loan by the Seller
     pursuant to this Agreement or the Mortgage Loan Purchase Agreement, as
     applicable, or the eligibility of any Mortgage Loan for purposes of this
     Agreement.

          (xi) Any permissive right of the Trustee hereunder shall not be
     construed as a duty.

     Section 9.03 Trustee and Securities Administrator Not Liable for
Certificates or Mortgage Loans. The recitals contained herein and in the
Certificates (other than the signature and countersignature of the Securities
Administrator on the Certificates) shall be taken as the statements of the
Depositor, and neither the Trustee nor the Securities Administrator shall have
any responsibility for their correctness. Neither the Trustee nor the Securities
Administrator makes any representation as to the validity or sufficiency of the
Certificates (other than the signature and countersignature of the Securities
Administrator on the Certificates) or of any Mortgage Loan except as expressly
provided in Sections 2.02 and 2.05 hereof; provided,


                                      -102-

<PAGE>

however, that the foregoing shall not relieve the Trustee or the Custodian of
the obligation to review the Mortgage Files pursuant to Sections 2.02 and 2.04.
The Securities Administrator's signature and countersignature (or
countersignature of its agent) on the Certificates shall be solely in its
capacity as Securities Administrator of the Trust Fund and shall not constitute
the Certificates an obligation of the Securities Administrator in any other
capacity. Neither the Trustee or the Securities Administrator shall be
accountable for the use or application by the Depositor of any of the
Certificates or of the proceeds of such Certificates, or for the use or
application of any funds paid to the Depositor with respect to the Mortgage
Loans. Subject to the provisions of Section 2.05, neither the Trustee nor the
Securities Administrator shall not be responsible for the legality or validity
of this Agreement or any document or instrument relating to this Agreement, the
validity of the execution of this Agreement or of any supplement hereto or
instrument of further assurance, or the validity, priority, perfection or
sufficiency of the security for the Certificates issued hereunder or intended to
be issued hereunder. Neither the Trustee nor the Securities Administrator shall
at any time have any responsibility or liability for or with respect to the
legality, validity and enforceability of any Mortgage or any Mortgage Loan, or
the perfection and priority of any Mortgage or the maintenance of any such
perfection and priority, or for or with respect to the sufficiency of the Trust
Fund or its ability to generate the payments to be distributed to
Certificateholders, under this Agreement. Neither the Trustee nor the Securities
Administrator shall have any responsibility for filing any financing or
continuation statement in any public office at any time or to otherwise perfect
or maintain the perfection of any security interest or lien granted to it
hereunder or to record this Agreement.

     Section 9.04 Trustee and Securities Administrator May Own Certificates. The
Trustee and the Securities Administrator in its individual capacity or in any
capacity other than as Trustee hereunder may become the owner or pledgee of any
Certificates with the same rights it would have if it were not Trustee or the
Securities Administrator, as applicable, and may otherwise deal with the parties
hereto.

     Section 9.05 Trustee's and Securities Administrator's Fees and Expenses.
The fees and expenses of the Trustee and the Securities Administrator shall be
paid by the Master Servicer in accordance with a side letter agreement. In
addition, the Trustee and the Securities Administrator will be entitled to
recover from the Master Servicer Collection Account pursuant to Section 4.03(b)
all reasonable out-of-pocket expenses, disbursements and advances and the
expenses of the Trustee and the Securities Administrator, respectively, in
connection with any Event of Default, any breach of this Agreement or any claim
or legal action (including any pending or threatened claim or legal action)
incurred or made by the Trustee or the Securities Administrator, respectively,
in the administration of the trusts hereunder (including the reasonable
compensation, expenses and disbursements of its counsel) except any such
expense, disbursement or advance as may arise from its negligence or intentional
misconduct or which is the responsibility of the Certificateholders or the Trust
Fund hereunder. If funds in the Master Servicer Collection Account are
insufficient therefor, the Trustee and the Securities Administrator shall
recover such expenses from the Depositor. Such compensation and reimbursement
obligation shall not be limited by any provision of law in regard to the
compensation of a trustee of an express trust.

     Section 9.06 Eligibility Requirements for Trustee and Securities
Administrator.


                                      -103-

<PAGE>

     (a) The Trustee and any successor Trustee and the Securities Administrator
and any successor Securities Administrator shall during the entire duration of
this Agreement be a state bank or trust company or a national banking
association organized and doing business under the laws of such state or the
United States of America, authorized under such laws to exercise corporate trust
powers, having a combined capital and surplus and undivided profits of at least
$40,000,000 or, in the case of a successor Trustee, $50,000,000, subject to
supervision or examination by federal or state authority and, in the case of the
Trustee, rated "BBB" or higher by S&P and "BBB" or higher by Fitch with respect
to their long-term rating and rated "BBB" or higher by S&P and "BBB" or higher
by Fitch with respect to any outstanding long-term unsecured unsubordinated
debt, and, in the case of a successor Trustee or successor Securities
Administrator other than pursuant to Section 9.10, rated in one of the two
highest long-term debt categories of, or otherwise acceptable to, each of the
Rating Agencies. If the Trustee publishes reports of condition at least
annually, pursuant to law or to the requirements of the aforesaid supervising or
examining authority, then for the purposes of this Section 9.06 the combined
capital and surplus of such corporation shall be deemed to be its total equity
capital (combined capital and surplus) as set forth in its most recent report of
condition so published. In case at any time the Trustee or the Securities
Administrator shall cease to be eligible in accordance with the provisions of
this Section 9.06, the Trustee or the Securities Administrator shall resign
immediately in the manner and with the effect specified in Section 9.08.

     (b) In addition, the Securities Administrator (i) may not be an Originator,
Master Servicer, Servicer, the Depositor or an affiliate of the Depositor unless
the Securities Administrator is in an institutional trust department of the
relevant entity, (ii) must be authorized to exercise corporate trust powers
under the laws of its jurisdiction of organization, and (iii) must be rated at
least "A" by S&P or "A" Fitch. If no successor Securities Administrator shall
have been appointed and shall have accepted appointment within 60 days after the
Securities Administrator ceases to be the Securities Administrator pursuant to
Section 9.08, then the Trustee shall either (i) perform the duties of the
Securities Administrator pursuant to this Agreement until such time as a new
Securities Administrator is appointed or (ii) petition a court of competent
jurisdiction to appoint a successor securities administrator. The Trustee shall
notify the Rating Agencies of any change of Securities Administrator.

     Section 9.07 Insurance. The Securities Administrator, at its own expense,
shall at all times maintain and keep in full force and effect: (i) fidelity
insurance, (ii) theft of documents insurance and (iii) forgery insurance (which
may be collectively satisfied by a "Financial Institution Bond" and/or a
"Bankers' Blanket Bond"). All such insurance shall be in amounts, with standard
coverage and subject to deductibles, as are customary for insurance typically
maintained by banks or their affiliates which act as custodians for
investor-owned mortgage pools. A certificate of an officer of the Securities
Administrator as to the Securities Administrator's compliance with this Section
9.07 shall be furnished to any Certificateholder upon reasonable written
request.

     Section 9.08 Resignation and Removal of the Trustee and Securities
Administrator.

     (a) The Trustee and the Securities Administrator may at any time resign and
be discharged from the trust hereby created by giving written notice thereof to
the Depositor and the Master Servicer, with a copy to the Rating Agencies. Upon
receiving such notice of resignation,


                                      -104-

<PAGE>

the Depositor shall promptly appoint a successor Trustee or successor Securities
Administrator, as applicable, by written instrument, in triplicate, one copy of
which instrument shall be delivered to each of the resigning Trustee or
Securities Administrator, as applicable, the successor Trustee or Securities
Administrator, as applicable. If no successor Trustee or Securities
Administrator shall have been so appointed and have accepted appointment within
30 days after the giving of such notice of resignation, the resigning Trustee or
Securities Administrator may petition any court of competent jurisdiction for
the appointment of a successor Trustee or Securities Administrator. If the
Securities Administrator and the Master Servicer are the same entity, then at
any time the Securities Administrator resigns or is removed as Securities
Administrator, the Master Servicer shall likewise be terminated as Master
Servicer.

     (b) If at any time the Trustee or the Securities Administrator shall cease
to be eligible in accordance with the provisions of Section 9.06 and shall fail
to resign after written request therefor by the Depositor or if at any time the
Trustee or the Securities Administrator shall become incapable of acting, or
shall be adjudged a bankrupt or insolvent, or a receiver of the Trustee or the
Securities Administrator, as applicable, or of its property shall be appointed,
or any public officer shall take charge or control of the Trustee or the
Securities Administrator, as applicable, or of its property or affairs for the
purpose of rehabilitation, conservation or liquidation, then the Depositor shall
promptly remove the Trustee, or shall be entitled to remove the Securities
Administrator, as applicable, and appoint a successor Trustee or Securities
Administrator, as applicable, by written instrument, in triplicate, one copy of
which instrument shall be delivered to each of the Trustee or Securities
Administrator, as applicable, so removed, the successor Trustee or Securities
Administrator, as applicable.

     (c) The Holders of Certificates evidencing Percentage Interests aggregating
not less than 51% of the Trust Fund may at any time remove the Trustee or the
Securities Administrator and appoint a successor Trustee or Securities
Administrator by written instrument or instruments, in quadruplicate, signed by
such Holders or their attorneys-in-fact duly authorized, one complete set of
which instruments shall be delivered to the Depositor, the Trustee, the
Securities Administrator (if the Trustee is removed), the Trustee (if the
Securities Administrator is removed), and the Trustee or Securities
Administrator so removed and the successor so appointed.

     (d) No resignation or removal of the Trustee or the Securities
Administrator and appointment of a successor Trustee or Securities Administrator
pursuant to any of the provisions of this Section 9.08 shall become effective
except upon appointment of and acceptance of such appointment by the successor
Trustee or Securities Administrator as provided in Section 9.09.

     Section 9.09 Successor Trustee and Successor Securities Administrator.

     (a) Any successor Trustee or Securities Administrator appointed as provided
in Section 9.08 shall execute, acknowledge and deliver to the Depositor, the
Master Servicer and its predecessor Trustee or Securities Administrator an
instrument accepting such appointment hereunder. The resignation or removal of
the predecessor Trustee or Securities Administrator shall then become effective
and such successor Trustee or Securities Administrator, without any further act,
deed or conveyance, shall become fully vested with all the rights, powers,
duties and obligations of its predecessor hereunder, with like effect as if
originally named as Trustee or


                                      -105-

<PAGE>

Securities Administrator herein. The predecessor Trustee or Securities
Administrator shall after payment of its outstanding fees and expenses promptly
deliver to the successor Trustee or Securities Administrator, as applicable, all
assets and records of the Trust held by it hereunder, and the Depositor and the
predecessor Trustee or Securities Administrator, as applicable, shall execute
and deliver such instruments and do such other things as may reasonably be
required for more fully and certainly vesting and confirming in the successor
Trustee or Securities Administrator, as applicable, all such rights, powers,
duties and obligations.

     (b) No successor Trustee or Securities Administrator shall accept
appointment as provided in this Section 9.09 unless at the time of such
acceptance such successor Trustee or Securities Administrator shall be eligible
under the provisions of Section 9.06.

     (c) Upon acceptance of appointment by a successor Trustee or Securities
Administrator as provided in this Section 9.09, the successor Trustee or
Securities Administrator shall mail notice of the succession of such Trustee or
Securities Administrator hereunder to all Certificateholders at their addresses
as shown in the Certificate Register and to the Rating Agencies. The Depositor
shall pay the cost of any mailing by the successor Trustee or Securities
Administrator.

     Section 9.10 Merger or Consolidation of Trustee or Securities
Administrator. Any state bank or trust company or national banking association
into which the Trustee or the Securities Administrator may be merged or
converted or with which it may be consolidated or any state bank or trust
company or national banking association resulting from any merger, conversion or
consolidation to which the Trustee or the Securities Administrator,
respectively, shall be a party, or any state bank or trust company or national
banking association succeeding to all or substantially all of the corporate
trust business of the Trustee or the Securities Administrator, respectively,
shall be the successor of the Trustee or the Securities Administrator,
respectively, hereunder, provided such state bank or trust company or national
banking association shall be eligible under the provisions of Section 9.06. Such
succession shall be valid without the execution or filing of any paper or any
further act on the part of any of the parties hereto, anything herein to the
contrary notwithstanding.

     Section 9.11 Appointment of Co-Trustee or Separate Trustee.

     (a) Notwithstanding any other provisions hereof, at any time, for the
purpose of meeting any legal requirements of any jurisdiction in which any part
of the Trust or property constituting the same may at the time be located, the
Depositor and the Trustee acting jointly shall have the power and shall execute
and deliver all instruments to appoint one or more Persons approved by the
Trustee and the Depositor to act as co-trustee or co-trustees, jointly with the
Trustee, or separate trustee or separate trustees, of all or any part of the
Trust, and to vest in such Person or Persons, in such capacity, such title to
the Trust, or any part thereof, and, subject to the other provisions of this
Section 9.11, such powers, duties, obligations, rights and trusts as the
Depositor and the Trustee may consider necessary or desirable.

     (b) If the Depositor shall not have joined in such appointment within 15
days after the receipt by it of a written request so to do, the Trustee shall
have the power to make such appointment without the Depositor.


                                      -106-

<PAGE>

     (c) No co-Master Servicer or separate trustee hereunder shall be required
to meet the terms of eligibility as a successor trustee under Section 9.06
hereunder and no notice to Certificateholders of the appointment of
co-trustee(s) or separate trustee(s) shall be required under Section 9.08
hereof.

     (d) In the case of any appointment of a co-trustee or separate trustee
pursuant to this Section 9.11, all rights, powers, duties and obligations
conferred or imposed upon the Trustee and required to be conferred on such
co-trustee shall be conferred or imposed upon and exercised or performed by the
Trustee and such separate trustee or co-trustee jointly, except to the extent
that under any law of any jurisdiction in which any particular act or acts are
to be performed (whether as Trustee hereunder or as successor to the Master
Servicer hereunder), the Trustee shall be incompetent or unqualified to perform
such act or acts, in which event such rights, powers, duties and obligations
(including the holding of title to the Trust or any portion thereof in any such
jurisdiction) shall be exercised and performed by such separate trustee or
co-trustee at the direction of the Trustee.

     (e) Any notice, request or other writing given to the Trustee shall be
deemed to have been given to each of the then separate trustees and co-trustees,
as effectively as if given to each of them. Every instrument appointing any
separate trustee or co-trustee shall refer to this Agreement and the conditions
of this Article IX. Each separate trustee and co-trustee, upon its acceptance of
the trusts conferred, shall be vested with the estates or property specified in
its instrument of appointment, either jointly with the Trustee or separately, as
may be provided therein, subject to all the provisions of this Agreement,
specifically including every provision of this Agreement relating to the conduct
of, affecting the liability of, or affording protection to, the Trustee. Every
such instrument shall be filed with the Trustee.

     (f) To the extent not prohibited by law, any separate trustee or co-trustee
may, at any time, request the Trustee, its agent or attorney-in-fact, with full
power and authority, to do any lawful act under or with respect to this
Agreement on its behalf and in its name. If any separate trustee or co-trustee
shall die, become incapable of acting, resign or be removed, all of its estates,
properties rights, remedies and trusts shall vest in and be exercised by the
Trustee, to the extent permitted by law, without the appointment of a new or
successor Trustee.

     (g) No Trustee under this Agreement shall be personally liable by reason of
any act or omission of another Trustee under this Agreement. The Depositor and
the Trustee acting jointly may at any time accept the resignation of or remove
any separate trustee or co-trustee.


                                      -107-

<PAGE>

     Section 9.12 Federal Information Returns and Reports to Certificateholders;
REMIC Administration.

     (a) REMIC elections as set forth in the Preliminary Statement shall be made
on Forms 1066 or other appropriate federal tax or information return for the
taxable year ending on the last day of the calendar year in which the
Certificates are issued. The regular interests and residual interest in each
REMIC shall be as designated in the Preliminary Statement.

     (b) The Closing Date is hereby designated as the "Startup Day" of each
REMIC within the meaning of section 860G(a)(9) of the Code. The latest possible
maturity date for purposes of Treasury Regulation 1.860G-1(a)(4) will be the
Latest Possible Maturity Date.

     (c) The Securities Administrator shall, for federal income tax purposes,
maintain books and records with respect to each REMIC on a calendar year and on
an accrual basis.

     (d) The Securities Administrator shall represent the Trust Fund in any
administrative or judicial proceeding relating to an examination or audit by any
governmental taxing authority with respect thereto. The Securities Administrator
shall pay any and all tax-related expenses (not including taxes) of each REMIC,
including but not limited to any professional fees or expenses related to audits
or any administrative or judicial proceedings with respect to such REMIC that
involve the Internal Revenue Service or state tax authorities, but only to the
extent that (i) such expenses are ordinary or routine expenses, including
expenses of a routine audit but not expenses of litigation (except as described
in (ii)); or (ii) such expenses or liabilities (including taxes and penalties)
are attributable to the negligence or willful misconduct of the Securities
Administrator in fulfilling its duties hereunder (including its duties as tax
return preparer). The Securities Administrator shall be entitled to
reimbursement of expenses to the extent provided in clause (i) above from the
Distribution Account, provided, however, the Securities Administrator shall not
be entitled to reimbursement for expenses incurred in connection with the
preparation of tax returns and other reports as required by this Section.

     (e) The Securities Administrator shall prepare and file, and the Trustee
shall sign, all of each REMIC's and the Trust Fund's federal and appropriate
state tax and information returns as such REMIC's direct representative. The
expenses of preparing and filing such returns shall be borne by the Securities
Administrator.

     (f) The Securities Administrator or its designee shall perform on behalf of
each REMIC all reporting and other tax compliance duties that are the
responsibility of such REMIC under the Code, the REMIC Provisions, or other
compliance guidance issued by the Internal Revenue Service or any state or local
taxing authority. Among its other duties, if required by the Code, the REMIC
Provisions, or other such guidance, the Securities Administrator shall provide,
upon receipt of additional reasonable compensation, to the Treasury or other
governmental authority such information as is necessary for the application of
any tax relating to the transfer of a Residual Certificate to any disqualified
person or organization pursuant to Treasury Regulation 1.860E-2(a)(5) and any
person designated in Section 860E(e)(3) of the Code.

     (g) The Securities Administrator and the Holders of Certificates shall take
any action or cause any REMIC to take any action necessary to create or maintain
the status of any REMIC


                                      -108-

<PAGE>

as a REMIC under the REMIC Provisions and shall assist each other as necessary
to create or maintain such status. Neither the Securities Administrator nor the
Holder of any Residual Certificate shall knowingly take any action, cause any
REMIC to take any action or fail to take (or fail to cause to be taken) any
action that, under the REMIC Provisions, if taken or not taken, as the case may
be, could (i) endanger the status of any REMIC as a REMIC or (ii) result in the
imposition of a tax upon any REMIC (including but not limited to the tax on
prohibited transactions as defined in Code Section 860F(a)(2) and the tax on
prohibited contributions set forth on Section 860G(d) of the Code) (either such
event, an "Adverse REMIC Event") unless the Securities Administrator has
received a REMIC Opinion (at the expense of the party seeking to take such
action) to the effect that the contemplated action will not endanger such status
or result in the imposition of such a tax. In addition, prior to taking any
action with respect to any REMIC or the assets therein, or causing any REMIC to
take any action, which is not expressly permitted under the terms of this
Agreement, any Holder of a Residual Certificate will consult with the Securities
Administrator, in writing, with respect to whether such action could cause an
Adverse REMIC Event to occur with respect to any REMIC, and no such Person shall
take any such action or cause any REMIC to take any such action as to which the
Securities Administrator has advised it in writing that an Adverse REMIC Event
could occur; provided, however, that if no Adverse REMIC Event would occur but
such action could result in the imposition of additional taxes on the Residual
Certificateholders, no such Person shall take any such action, or cause any
REMIC to take any such action without the written consent of the Residual
Certificateholders.

     (h) Each Holder of a Residual Certificate shall pay when due any and all
taxes imposed on the related REMIC by federal or state governmental authorities.
To the extent that such taxes are not paid by a Residual Certificateholder, the
Securities Administrator shall pay any remaining REMIC taxes out of current or
future amounts otherwise distributable to the Holder of the Residual Certificate
in any such REMIC or, if no such amounts are available, out of other amounts
held in the Distribution Account, and shall reduce amounts otherwise payable to
holders of regular interests in any such REMIC, as the case may be.

     (i) The Securities Administrator shall prepare and file with the Internal
Revenue Service ("IRS"), on behalf of each of REMIC 1 and the Upper Tier REMIC,
an application for an employer identification number on IRS Form SS-4 or by any
other acceptable method. The Securities Administrator shall also file a Form
8811 as required. The Securities Administrator, upon receipt from the IRS of the
Notice of Taxpayer Identification Number Assigned, shall upon request promptly
forward a copy of such notice to the Depositor. The Securities Administrator
shall furnish any other information that is required by the Code and regulations
thereunder to be made available to Certificateholders. The Depositor shall cause
each Servicer to provide the Securities Administrator with such information as
is necessary for the Securities Administrator to prepare such reports.

     (j) No additional contributions of assets shall be made to any REMIC,
except as expressly provided in this Agreement.

     (k) The Securities Administrator shall not enter into any arrangement by
which any REMIC will receive a fee or other compensation for services.


                                      -109-

<PAGE>

     (l) The Class A-R Holder shall act as "tax matters person" with respect to
each REMIC and irrevocably appoints the Securities Administrator to act as its
agent in such roles.

     (m) The Securities Administrator shall prepare or cause to be prepared on
behalf of the Trust Fund, based upon information calculated in accordance with
this Agreement pursuant to instructions given by the Depositor, the Trustee
shall sign, and the Securities Administrator shall file federal tax returns, all
in accordance with Section 9.12 hereof. The Securities Administrator shall
prepare and file, and the Trustee shall sign, such state income tax returns and
such other returns as may be required by applicable law relating to the Trust
Fund, and, if required by state law, and shall file any other documents to the
extent required by applicable state tax law (to the extent such documents are in
the Securities Administrator's possession). The Securities Administrator shall
forward copies to the Depositor of all such returns and Form 1099 supplemental
tax information and such other information within the control of the Securities
Administrator as the Depositor may reasonably request in writing, and shall
distribute to each Certificateholder such forms and furnish such information
within the control of the Securities Administrator as are required by the Code
and the REMIC Provisions to be furnished to them, and will prepare and
distribute to Certificateholders Form 1099 (supplemental tax information) (or
otherwise furnish information within the control of the Securities
Administrator) to the extent required by applicable law.

     (n) None of the Securities Administrator, the Trustee or the Depositor, as
assignees under this Agreement, shall provide any consent pursuant to this
Agreement or knowingly take any action under this Agreement that would conflict
with or violate the provisions of this Section 9.12.

     (o) The parties intend that the portion of the Trust Fund consisting of the
right to receive the payments distributable to the Class P Certificates shall be
treated as a "grantor trust" under the Code, for the benefit of the holders of
the Class P Certificates, and the provisions hereof shall be interpreted
consistently with this intention. In furtherance of such intention, the
Securities Administrator shall (i) furnish or cause to be furnished to the
holders of the Class P Certificates information regarding their allocable share
of the income with respect to such grantor trust and (ii) file or cause to be
filed with the Internal Revenue Service, and the Trustee shall sign, Form 1041
(together with any necessary attachments) and such other forms as may be
applicable.

     (p) Notwithstanding any other provision of this Agreement, the Securities
Administrator shall comply with all federal withholding requirements respecting
payments to Certificateholders of interest or original issue discount on the
Mortgage Loans, that the Securities Administrator reasonably believes are
applicable under the Code. The consent of Certificateholders shall not be
required for such withholding. In the event the Securities Administrator
withholds any amount from interest or original issue discount payments or
advances thereof to any Certificateholder pursuant to federal withholding
requirements, the Securities Administrator shall, together with its monthly
report to such Certificateholders, indicate such amount withheld.

     (q) The Trustee and the Securities Administrator agree to indemnify the
Trust Fund and the Depositor for any taxes and costs including, without
limitation, any reasonable attorneys


                                      -110-

<PAGE>

fees imposed on or incurred by the Trust Fund, the Depositor or the Trustee, as
a result of a breach of the Trustee's covenants and the Securities
Administrator's covenants, respectively, set forth in this Section 9.12;
provided, however, such liability and obligation to indemnify in this paragraph
shall not be joint and several and neither the Trustee nor the Securities
Administrator shall be liable or be obligated to indemnify the Trust Fund for
the failure by the other to perform any duty under this Agreement or the breach
by the other of any covenant in this Agreement.

     (r) The Securities Administrator covenants and agrees that it shall act as
agent (and the Securities Administrator is hereby appointed to act as agent) of
the Tax Matters Person on behalf of each of the REMICs provided for herein and
that in such capacity it shall: (a) to the extent that they are under its
control conduct the affairs of each of the REMICs provided for herein at all
times that any Certificates are outstanding so as to maintain the status of each
of the REMICs provided for herein as a REMIC under the REMIC Provisions; (b) not
knowingly or intentionally take any action or omit to take any action that would
cause the termination of the REMIC status of any of the REMICs provided for
herein or result in the imposition of tax upon any such REMIC; (c) not knowingly
or intentionally take any action or omit to take any action that would cause the
termination of the grantor trust status under Subpart E, Part I of Subchapter J
of the Code of any of the grantor trusts provided for herein or result in the
imposition of tax upon any such grantor trust; and (d) as and when necessary and
appropriate, represent each of the REMICs provided for herein in any
administrative or judicial proceedings relating to an examination or audit by
any governmental taxing authority, request an administrative adjustment as to
any taxable year of any of the REMICs provided for herein, enter into settlement
agreements with any governmental taxing agency, extend any statute of
limitations relating to any tax item of any of the REMICs provided for herein,
and otherwise act on behalf of each of the REMICs provided for herein in
relation to any tax matter involving any of such REMICs or any controversy
involving the Trust Fund.

     (s) Each of the Depositor, the Master Servicer, the Securities
Administrator and the Trustee agrees not to take or omit to take knowingly or
intentionally, any action or omit to take any action that would cause the
termination of the REMIC status of any of the REMICs provided for herein or
result in the imposition of a tax upon any of the REMICs provided for herein.


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<PAGE>

                                    ARTICLE X
                                   TERMINATION

     Section 10.01 Termination upon Liquidation or Repurchase of all Mortgage
Loans.

     (a) Subject to Section 10.03, the obligations and responsibilities of the
Depositor, the Master Servicer, the Securities Administrator and the Trustee
created hereby with respect to the Trust Fund shall terminate upon the earlier
of (a) an Optional Termination and (b) the later of (i) the maturity or other
liquidation of the last Mortgage Loan remaining in the Trust Fund (or any
Monthly Advance with respect thereto) and the disposition of all REO Property
and (ii) the distribution to Certificateholders of all amounts required to be
distributed to them pursuant to this Agreement, as applicable. In no event shall
the trusts created hereby continue beyond the earlier of (i) the expiration of
21 years from the death of the last survivor of the descendants of Joseph P.
Kennedy, the late Ambassador of the United States to the Court of St. James's,
living on the date hereof and (ii) the Latest Possible Maturity Date.

     (b) On or before the Determination Date following the Initial Optional
Termination Date, the Securities Administrator shall attempt to terminate the
Trust Fund by conducting an auction of all of the Mortgage Loans and REO
Properties via a solicitation of bids from at least three (3) bidders, each of
which shall be a nationally recognized participant in mortgage finance (the
"Auction"). The Depositor and the Securities Administrator agree to work in good
faith to develop bid procedures in advance of the Initial Optional Termination
Date to govern the operation of the Auction. The Securities Administrator shall
be entitled to retain an investment banking firm and/or other agents in
connection with the Auction, the cost of which shall be included in the Optional
Termination Price (unless an Optional Termination does not occur in which case
such costs shall be an expense of the Trust Fund). The Securities Administrator
shall accept the highest bid received at the Auction; provided that the amount
of such bid equals or exceeds the Optional Termination Price. The Securities
Administrator shall determine the Optional Termination Price based upon
information provided by (i) the Master Servicer with respect to the amounts
described in clauses (A) and (B) of the definition of "Optional Termination
Price" (other than Securities Administrator's expenses) and (ii) the Depositor
with respect to the information described in clause (C) of the definition of
"Optional Termination Price." The Securities Administrator may conclusively rely
upon the information provided to it in accordance with the immediately preceding
sentence and shall not have any liability for the failure of any party to
provide such information.

     If an Optional Termination does not occur as a result of the Auction's
failure to achieve the Optional Termination Price, the Master Servicer may, on
any Distribution Date following such Auction, at its option, terminate the Trust
Fund by purchasing all of the Mortgage Loans and REO Properties at a price equal
to the Optional Termination Price. In connection with such termination, the
Optional Termination Price shall be delivered to the Securities Administrator no
later than the Business Day immediately preceding the related Distribution Date.
Notwithstanding anything to the contrary herein, the Optional Termination Amount
paid to the Securities Administrator by the winning bidder at the Auction or by
the Master Servicer shall be deposited by the Securities Administrator directly
into the Distribution Account immediately upon receipt. Upon any termination as
a result of an Auction, the Securities Administrator shall, out of the Optional
Termination Amount deposited into the Distribution Account, (x) pay the


                                      -112-

<PAGE>

Securities Administrator its costs and expenses necessary to conduct the Auction
and any other unreimbursed amounts owing to it and (y) pay to the Master
Servicer or Servicer, the aggregate amount of any unreimbursed out-of-pocket
costs and expenses owed to the Master Servicer or Servicer and any unpaid or
unreimbursed Servicing Fees, Monthly Advances and Servicing Advances.

     (c) Notwithstanding anything to the contrary in clause (b) above, in the
event that the Securities Administrator receives the written opinion of a
nationally recognized participant in mortgage finance acceptable to the Seller
that the Mortgage Loans and REO Properties to be included in the Auction will
not be saleable at a price sufficient to achieve the Optional Termination Price,
the Securities Administrator need not conduct the Auction. In such event, the
Master Servicer shall have the option to purchase the Mortgage Loans and REO
Properties at the Optional Termination Price as of the Initial Optional
Termination Date.

     Section 10.02 Final Distribution on the Certificates.

     If on any Determination Date, (i) the Securities Administrator determines
that there are no Outstanding Mortgage Loans and no other funds or assets in the
Trust Fund other than the funds in the Master Servicer Collection Account, the
Securities Administrator shall send a final distribution notice promptly to each
Certificateholder or (ii) the Securities Administrator determines that a Class
of Certificates shall be retired after a final distribution on such Class, the
Securities Administrator shall notify the Certificateholders within seven (7)
Business Days after such Determination Date that the final distribution in
retirement of such Class of Certificates is scheduled to be made on the
immediately following Distribution Date. Any final distribution made pursuant to
the immediately preceding sentence will be made only upon presentation and
surrender of the Certificates at the office of the Securities Administrator.

     Notice of any termination of the Trust Fund, specifying the Distribution
Date on which Certificateholders may surrender their Certificates for payment of
the final distribution and cancellation, shall be given promptly by the
Securities Administrator by letter to Certificateholders mailed no later than
the last calendar day of the month immediately preceding the month of such final
distribution (or with respect to an Auction, mailed no later than one Business
Day following completion of such Auction). Any such notice shall specify (a) the
Distribution Date upon which final distribution on the Certificates will be made
upon presentation and surrender of Certificates at the office therein
designated, (b) the location of the office or agency at which such presentation
and surrender must be made, and (c) that the Record Date otherwise applicable to
such Distribution Date is not applicable, distributions being made only upon
presentation and surrender of the Certificates at the office therein specified.
The Securities Administrator will give such notice to each Rating Agency at the
time such notice is given to Certificateholders.

     In the event such notice is given, the Master Servicer shall cause all
funds in the Master Servicer Collection Account to be deposited in the
Distribution Account on the Business Day prior to the applicable Distribution
Date in an amount equal to the final distribution in respect of the
Certificates. Upon such final deposit with respect to the Trust Fund and the
receipt by the Trustee, or its Custodian, of a Request for Release therefor, the
Trustee, or its Custodian, shall


                                      -113-

<PAGE>

promptly release to the Securities Administrator or the Master Servicer, as
applicable, the Mortgage Files for the Mortgage Loans.

     Upon presentation and surrender of the Certificates, the Securities
Administrator shall cause to be distributed to Certificateholders of each Class
the amounts allocable to such Certificates held in the Distribution Account in
the order and priority set forth in Section 6.01 hereof on the final
Distribution Date and in proportion to their respective Percentage Interests.

     In the event that any affected Certificateholders shall not surrender
Certificates for cancellation within six months after the date specified in the
above-mentioned written notice, the Securities Administrator shall give a second
written notice to the remaining Certificateholders to surrender their
Certificates for cancellation and receive the final distribution with respect
thereto. If within six months after the second notice all the applicable
Certificates shall not have been surrendered for cancellation, the Securities
Administrator may take appropriate steps, or may appoint an agent to take
appropriate steps, to contact the remaining Certificateholders concerning
surrender of their Certificates, and the cost thereof shall be paid out of the
funds and other assets that remain a part of the Trust Fund. If within one year
after the second notice all Certificates shall not have been surrendered for
cancellation, the Class A-R Certificateholders shall be entitled to all
unclaimed funds and other assets of the Trust Fund that remain subject hereto.
Upon payment to the Class A-R Certificateholders of such funds and assets, the
Securities Administrator shall have no further duties or obligations with
respect thereto.

     Section 10.03 Additional Termination Requirements.

     (a) In the event the Securities Administrator or the Master Servicer
exercises its purchase option as provided in Section 10.01, the Trust Fund shall
be terminated in accordance with the following additional requirements, unless
the Securities Administrator shall have been furnished with an Opinion of
Counsel to the effect that the failure of the Trust Fund to comply with the
requirements of this Section will not (i) result in the imposition of taxes on
"prohibited transactions" of the Trust Fund as defined in Section 860F of the
Code or (ii) cause any REMIC constituting part of the Trust Fund to fail to
qualify as a REMIC at any time that any Certificates are outstanding:

          (i) Within 90 days prior to the final Distribution Date, the
     Securities Administrator shall adopt and sign a plan of complete
     liquidation of the Trust Fund as provided to it by the terminating
     purchaser, meeting the requirements of a "qualified liquidation" under
     Section 860F of the Code and any regulations thereunder; and

          (ii) At or after the time of adoption of such a plan of complete
     liquidation and at or prior to the final Distribution Date, the Securities
     Administrator shall sell all of the assets of the Trust Fund for cash
     pursuant to the terms of the plan of complete liquidation.

     (b) By their acceptance of Certificates, the Holders thereof hereby agree
to appoint the Securities Administrator as their attorney in fact to: (i) adopt
such a plan of complete liquidation (and the Certificateholders hereby appoint
the Securities Administrator as their attorney in fact to sign such plan) as
appropriate and (ii) to take such other action in connection


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<PAGE>

therewith as may be reasonably required to carry out such plan of complete
liquidation all in accordance with the terms hereof.

                                   ARTICLE XI
                            MISCELLANEOUS PROVISIONS

     Section 11.01 Intent of Parties. The parties intend that each REMIC shall
be treated as a REMIC for federal income tax purposes and that the provisions of
this Agreement should be construed in furtherance of this intent.

     Section 11.02 Amendment.

     (a) This Agreement may be amended from time to time by the Depositor, the
Master Servicer, the Securities Administrator and the Trustee, and without the
consent of any of the Certificateholders to:

          (i) to cure any ambiguity or correct any mistake,

          (ii) to correct, modify or supplement any provision herein which may
     be inconsistent with any other provision herein,

          (iii) to add any other provisions with respect to matters or questions
     arising under this Agreement, or

          (iv) to modify, alter, amend, add to or rescind any of the terms or
     provisions contained in this Agreement, provided, however, that, in the
     case of clauses (iii) and (iv), such amendment will not, as evidenced by an
     Opinion of Counsel addressed to the Securities Administrator to such
     effect, adversely affect in any material respect the interests of any
     Certificateholder; provided, further, however, that such amendment will be
     deemed to not adversely affect in any material respect the interest of any
     Holder if the Person requesting such amendment obtains a letter from each
     Rating Agency stating that such amendment will not result in a reduction or
     withdrawal of its rating of any Class of the Certificates, it being
     understood and agreed that any such letter in and of itself will not
     represent a determination as to the materiality of any such amendment and
     will represent a determination only as to the credit issues affecting any
     such rating.

     Notwithstanding the foregoing, without the consent of the
Certificateholders, the Depositor, the Master Servicer, the Securities
Administrator and the Trustee may at any time and from time to time amend this
Agreement to modify, eliminate or add to any of its provisions to such extent as
shall be necessary or appropriate to maintain the qualification of any of the
REMICs provided for herein as REMICs under the Code or to avoid or minimize the
risk of the imposition of any tax on the Trust Fund or any of the REMICs
provided for herein pursuant to the Code that would be a claim against the Trust
Fund at any time prior to the final redemption of the Certificates, provided
that the Trustee and the Securities Administrator shall have been provided an
Opinion of Counsel addressed to the Trustee and the Securities Administrator,
which opinion shall be an expense of the party requesting such amendment but in
any case shall not be


                                      -115-

<PAGE>

an expense of the Trustee and the Securities Administrator, to the effect that
such action is necessary or appropriate to maintain such qualification or to
avoid or minimize the risk of the imposition of such a tax.

     (b) This Agreement may also be amended from time to time by the Master
Servicer, the Depositor, the Securities Administrator and the Trustee, and the
Assignment Agreements may also be amended from time to time by the Master
Servicer and the Trustee, with the consent of the Holders of Certificates
evidencing Percentage Interests aggregating not less than 51% of the Trust Fund
or of the applicable Class or Classes, if such amendment affects only such Class
or Classes, for the purpose of adding any provisions to or changing in any
manner or eliminating any of the provisions of this Agreement or of modifying in
any manner the rights of the Certificateholders; provided, however, that no such
amendment shall (i) reduce in any manner the amount of, or delay the timing of,
payments received on Mortgage Loans which are required to be distributed on any
Regular Certificate without the consent of the Holder of such Regular
Certificate, or (ii) reduce the aforesaid percentage of Certificates the Holders
of which are required to consent to any such amendment, without the consent of
the Holders of all Certificates then outstanding. Notwithstanding any contrary
provision of this Agreement, the Trustee shall not consent to any amendment to
this Agreement unless it shall have first received an Opinion of Counsel
addressed to the Trustee, which opinion shall be an expense of the party
requesting such amendment but in any case shall not be an expense of the
Trustee, to the effect that such amendment is permitted hereunder, that all
conditions precedent to the execution of such amendment have been satisfied and
that such amendment will not cause the imposition of any tax on the Trust Fund,
any of the REMICs provided for herein or the Certificateholders or cause any of
the REMICs provided for herein to fail to qualify as a REMIC at any time that
any Certificates are outstanding.

     (c) Promptly after the execution of any such amendment, the Securities
Administrator shall furnish a copy of such amendment or written notification of
the substance of such amendment to each Certificateholder, with a copy to the
Rating Agencies.

     (d) In the case of an amendment under Subsection 11.02(b) above, it shall
not be necessary for the Certificateholders to approve the particular form of
such an amendment. Rather, it shall be sufficient if the Certificateholders
approve the substance of the amendment. The manner of obtaining such consents
and of evidencing the authorization of the execution thereof by
Certificateholders shall be subject to such reasonable regulations as the
Trustee may prescribe.

     (e) Prior to the execution of any amendment to this Agreement, the Trustee
and the Securities Administrator shall be entitled to receive and rely upon an
Opinion of Counsel stating that the execution of such amendment will not
adversely affect the status of any REMIC created hereunder. The Trustee and the
Securities Administrator may, but shall not be obligated to, enter into any such
amendment which affects the Trustee's or the Securities Administrator's own
respective rights, duties or immunities under this Agreement.

     Section 11.03 Recordation of Agreement. To the extent permitted by
applicable law, this Agreement is subject to recordation in all appropriate
public offices for real property records in all the counties or other comparable
jurisdictions in which any or all of the Mortgaged


                                      -116-

<PAGE>

Properties are situated, and in any other appropriate public recording office or
elsewhere. The Depositor shall effect such recordation, at the expense of the
Issuing Entity upon the request in writing of a Certificateholder, but only if
such direction is accompanied by an Opinion of Counsel (provided at the expense
of the Certificateholder requesting recordation) to the effect that such
recordation would materially and beneficially affect the interests of the
Certificateholders or is required by law.

     Section 11.04 Limitation on Rights of Certificateholders.

     (a) The death or incapacity of any Certificateholder shall not terminate
this Agreement or the Issuing Entity, nor entitle such Certificateholder's legal
representatives or heirs to claim an accounting or to take any action or
proceeding in any court for a partition or winding up of the Issuing Entity, nor
otherwise affect the rights, obligations and liabilities of the parties hereto
or any of them.

     (b) Except as expressly provided in this Agreement, no Certificateholders
shall have any right to vote or in any manner otherwise control the operation
and management of the Issuing Entity, or the obligations of the parties hereto,
nor shall anything herein set forth, or contained in the terms of the
Certificates, be construed so as to establish the Certificateholders from time
to time as partners or members of an association; nor shall any
Certificateholders be under any liability to any third Person by reason of any
action taken by the parties to this Agreement pursuant to any provision hereof.

     (c) No Certificateholder shall have any right by virtue of any provision of
this Agreement to institute any suit, action or proceeding in equity or at law
upon, under or with respect to this Agreement against the Depositor, the
Securities Administrator, the Master Servicer or any successor to any such
parties unless (i) such Certificateholder previously shall have given to the
Trustee a written notice of a continuing default, as herein provided, (ii) the
Holders of Certificates evidencing Percentage Interests aggregating not less
than 51% of the Trust Fund shall have made written request upon the Trustee to
institute such action, suit or proceeding in its own name as Trustee hereunder
and shall have offered to the Trustee such reasonable indemnity as it may
require against the costs and expenses and liabilities to be incurred therein or
thereby, and (iii) the Trustee, for 60 days after its receipt of such notice,
request and offer of indemnity, shall have neglected or refused to institute any
such action, suit or proceeding.

     (d) No one or more Certificateholders shall have any right by virtue of any
provision of this Agreement to affect the rights of any other Certificateholders
or to obtain or seek to obtain priority or preference over any other such
Certificateholder, or to enforce any right under this Agreement, except in the
manner herein provided and for the equal, ratable and common benefit of all
Certificateholders. For the protection and enforcement of the provisions of this
Section 11.04, each and every Certificateholder and the Trustee shall be
entitled to such relief as can be given either at law or in equity.


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<PAGE>

     Section 11.05 Acts of Certificateholders.

     (a) Any request, demand, authorization, direction, notice, consent, waiver
or other action provided by this Agreement to be given or taken by
Certificateholders may be embodied in and evidenced by one or more instruments
of substantially similar tenor signed by such Certificateholders in person or by
an agent duly appointed in writing. Except as herein otherwise expressly
provided, such action shall become effective when such instrument or instruments
are delivered to the Trustee and, where it is expressly required, to the
Depositor. Proof of execution of any such instrument or of a writing appointing
any such agent shall be sufficient for any purpose of this Agreement and
conclusive in favor of the Trustee and the Depositor, if made in the manner
provided in this Section 11.05.

     (b) The fact and date of the execution by any Person of any such instrument
or writing may be proved by the affidavit of a witness of such execution or by a
certificate of a notary public or other officer authorized by law to take
acknowledgments of deeds, certifying that the individual signing such instrument
or writing acknowledged to him the execution thereof. Where such execution is by
a signer acting in a capacity other than his or her individual capacity, such
certificate or affidavit shall also constitute sufficient proof of his or her
authority. The fact and date of the execution of any such instrument or writing,
or the authority of the individual executing the same, may also be proved in any
other manner which the Trustee deems sufficient.

     (c) The ownership of Certificates (notwithstanding any notation of
ownership or other writing on such Certificates, except an endorsement in
accordance with Section 5.02 made on a Regular Certificate presented in
accordance with Section 5.04) shall be proved by the Certificate Register, and
neither the Trustee, the Securities Administrator, the Depositor, the Master
Servicer nor any successor to any such parties shall be affected by any notice
to the contrary.

     (d) Any request, demand, authorization, direction, notice, consent, waiver
or other action of the holder of any Regular Certificate shall bind every future
holder of the same Regular Certificate and the holder of every Regular
Certificate issued upon the registration of transfer or exchange thereof, if
applicable, or in lieu thereof with respect to anything done, omitted or
suffered to be done by the Trustee, the Securities Administrator, the Depositor,
the Master Servicer or any successor to any such party in reliance thereon,
whether or not notation of such action is made upon such Certificates.

     (e) In determining whether the Holders of the requisite percentage of
Certificates evidencing Percentage Interests have given any request, demand,
authorization, direction, notice, consent or waiver hereunder, Certificates
owned by the Trustee, the Securities Administrator, the Depositor, the Master
Servicer or any Affiliate thereof shall be disregarded, except as otherwise
provided in Section 11.02(b) and except that, in determining whether the
Securities Administrator or the Trustee shall be protected in relying upon any
such request, demand, authorization, direction, notice, consent or waiver, only
Certificates which a Responsible Officer of the Trustee knows to be so owned
shall be so disregarded. Certificates which have been pledged in good faith to
the Trustee, the Securities Administrator, the Depositor, the Master Servicer or
any Affiliate thereof may be regarded as outstanding if the pledgor establishes
to the


                                      -118-

<PAGE>

satisfaction of the Securities Administrator the pledgor's right to act with
respect to such Certificates and that the pledgor is not an Affiliate of the
Trustee, the Securities Administrator, the Depositor, or the Master Servicer, as
the case may be.

     Section 11.06 Governing Law. THIS AGREEMENT AND THE CERTIFICATES SHALL BE
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REFERENCE
TO ITS CONFLICT OF LAWS RULES AND THE OBLIGATIONS, RIGHTS AND REMEDIES OF THE
PARTIES HEREUNDER SHALL BE DETERMINED IN ACCORDANCE WITH SUCH LAWS.

     Section 11.07 Notices. All demands and notices hereunder shall be in
writing and shall be deemed given when delivered at (including delivery by
facsimile) or mailed by registered mail, return receipt requested, postage
prepaid, or by recognized overnight courier, to (i) in the case of the
Depositor, 4 World Financial Center, New York, New York 10281, Attention: Vice
President-Servicing, telecopier number: (212) 449-1000, or to such other address
as may hereafter be furnished to the other parties hereto in writing; (ii) in
the case of the Trustee, at its Corporate Trust Office, or such other address as
may hereafter be furnished to the other parties hereto in writing; (iii) in the
case of the Master Servicer or Securities Administrator, Wells Fargo Bank, N.A.,
P.O. Box 98, Columbia, Maryland 21046, Attention MLMBS Series 2007-1, or, in the
case of overnight deliveries, 9062 Old Annapolis Road, Columbia, Maryland
21045-1951, Attention: MLMBS Series 2007-1, facsimile no.: (410) 715-2380, or
such other address as may hereafter be furnished to the other parties hereto in
writing; (iv) in the case of the Custodian, Wells Fargo Bank, N.A., 1015 10th
Avenue Southeast, MS 0031, Minneapolis, Minnesota 55414, Attention: MLMBS Series
2007-1; or such other address as may hereafter be furnished to the other parties
hereto in writing; or (v) in the case of the Rating Agencies, Fitch, Inc., One
State Street Plaza, New York, New York 10004 and Standard & Poor's, a division
of The McGraw-Hill Companies, Inc., 55 Water Street, New York, New York 10041.
Any notice delivered to the Depositor, the Trustee, the Securities Administrator
or the Master Servicer under this Agreement shall be effective only upon
receipt. Any notice required or permitted to be mailed to a Certificateholder,
unless otherwise provided herein, shall be given by first-class mail, postage
prepaid, at the address of such Certificateholder as shown in the Certificate
Register. Any notice so mailed within the time prescribed in this Agreement
shall be conclusively presumed to have been duly given when mailed, whether or
not the Certificateholder receives such notice.

     Section 11.08 Severability of Provisions. If any one or more of the
covenants, agreements, provisions or terms of this Agreement shall be for any
reason whatsoever held invalid, then such covenants, agreements, provisions or
terms shall be deemed severed from the remaining covenants, agreements,
provisions or terms of this Agreement and shall in no way affect the validity or
enforceability of the other provisions of this Agreement or of the Certificates
or the rights of the holders thereof.

     Section 11.09 Successors and Assigns. The provisions of this Agreement
shall be binding upon and inure to the benefit of the respective successors and
assigns of the parties hereto.

     Section 11.10 Article and Section Headings. The article and section
headings herein are for convenience of reference only, and shall not limit or
otherwise affect the meaning hereof.


                                      -119-

<PAGE>

     Section 11.11 Counterparts. This Agreement may be executed in two or more
counterparts each of which when so executed and delivered shall be an original
but all of which together shall constitute one and the same instrument.

     Section 11.12 Notice to Rating Agencies. The article and section headings
herein are for convenience of reference only, and shall not limited or otherwise
affect the meaning hereof. The Trustee shall promptly provide notice to each
Rating Agency with respect to each of the following of which it has actual
knowledge:

     1. Any material change or amendment to this Agreement or the Servicing
Agreements;

     2. The occurrence of any Event of Default that has not been cured;

     3. The resignation or termination of the Trustee or the Securities
Administrator;

     4. The repurchase or substitution of Mortgage Loans;

     5. The final payment to Certificateholders; and

     6. Any change in the location of the Master Servicer Collection Account or
the Distribution Account.

     Section 11.13 Third Party Rights. The Custodian shall be deemed a third
party beneficiary of this Agreement regarding provisions related to indemnifying
the Custodian so long as the Custodian remains custodian under the Custodial
Agreement.

                                   ARTICLE XII
                              REMIC ADMINISTRATION

     Section 12.01 [Reserved].

     Section 12.02 Prohibited Transactions and Activities. Neither the Depositor
nor the Securities Administrator shall sell, dispose of, or substitute for any
of the Mortgage Loans, except in a disposition pursuant to (i) the foreclosure
of a Mortgage Loan, (ii) the bankruptcy of the Trust Fund, (iii) the termination
of each REMIC pursuant to Article X of this Agreement, (iv) a substitution
pursuant to Article II of this Agreement or (v) a repurchase of Mortgage Loans
pursuant to Article II of this Agreement, nor acquire any assets for any REMIC,
nor sell or dispose of any investments in the Distribution Account for gain, nor
accept any contributions to any REMIC after the Closing Date, unless it has
received an Opinion of Counsel (at the expense of the party causing such sale,
disposition, or substitution) that such disposition, acquisition, substitution,
or acceptance will not (a) affect adversely the status of any such REMIC as a
REMIC or of the interests therein other than the Residual Certificate as the
regular interests therein, (b) affect the distribution of interest or principal
on the Certificates, (c) result in the encumbrance of the assets transferred or
assigned to the Trust Fund (except pursuant to the


                                      -120-

<PAGE>

provisions of this Agreement) or (d) cause any such REMIC to be subject to any
tax including a tax on prohibited transactions or prohibited contributions
pursuant to the REMIC Provisions.

     Section 12.03 Indemnification with Respect to Prohibited Transactions or
Loss of REMIC Status. In the event that a REMIC fails to qualify as a REMIC,
loses its status as a REMIC, or incurs federal, state or local taxes as a result
of a prohibited transaction or prohibited contribution under the REMIC
Provisions due to the negligent performance by the Securities Administrator of
its duties and obligations set forth herein, the Securities Administrator shall
indemnify the Certificateholders of the related Residual Certificate against any
and all losses, claims, damages, liabilities or expenses ("Losses") resulting
from such negligence; provided, however, that the Securities Administrator shall
not be liable for any such Losses attributable to the action or inaction of the
Depositor or the Holder of the Residual Certificate, nor for any such Losses
resulting from misinformation provided by any of the foregoing parties on which
the Securities Administrator has relied. Notwithstanding the foregoing, however,
in no event shall the Trustee or the Securities Administrator have any liability
(1) for any action or omission that is taken in accordance with and in
compliance with the express terms of, or which is expressly permitted by the
terms of, this Agreement or the Mortgage Loan Purchase Agreement, (2) for any
Losses other than arising out of malfeasance, willful misconduct or negligent
performance by the Securities Administrator with respect to its duties and
obligations set forth herein, and (3) for any special or consequential damages
to Certificateholders of the related Residual Certificate (in addition to
payment of principal and interest on the Certificates).

     Section 12.04 REO Property.

     (a) Notwithstanding any other provision of this Agreement, the Securities
Administrator shall not, except to the extent provided in this Agreement for
which the Securities Administrator is obligated to perform, knowingly permit any
Servicer to rent, lease, otherwise earn income or take any other action on
behalf of any REMIC with respect to any REO Property which might cause such REO
Property to fail to qualify as "foreclosure property" within the meaning of
section 860G(a)(8) of the Code or result in the receipt by any REMIC of any
"income from non-permitted assets" within the meaning of section 860F(a)(2) of
the Code or any "net income from foreclosure property" which is subject to tax
under the REMIC Provisions unless the Servicer has provided to the Securities
Administrator an Opinion of Counsel concluding that, under the REMIC Provisions,
such action would not adversely affect the status of any REMIC as a REMIC and
any income generated for any REMIC by the REO Property would not result in the
imposition of a tax upon such REMIC.

     (b) The Depositor shall cause each Servicer (to the extent provided in the
applicable Servicing Agreement) to make reasonable efforts to sell any REO
Property for its fair market value. In any event, however, the Depositor shall,
or shall cause the Servicer (to the extent provided in this Agreement) to,
dispose of any REO Property within three years of its acquisition by the Trust
Fund unless the Depositor or such Servicer (on behalf of the Trust Fund) has
received a grant of extension from the Internal Revenue Service to the effect
that, under the REMIC Provisions and any relevant proposed legislation and under
applicable state law, the REMIC may hold REO Property for a longer period
without adversely affecting the REMIC status of such REMIC or causing the
imposition of a Federal or state tax upon such REMIC. If such an extension has
been received, then the Depositor, acting on behalf of the Trustee


                                      -121-

<PAGE>

hereunder, shall, or shall cause the Servicer to, continue to attempt to sell
the REO Property for its fair market value for such period longer than three
years as such extension permits (the "Extended Period"). If such an extension
has not been received and the Depositor or the Servicer, acting on behalf of the
Trust Fund hereunder, is unable to sell the REO Property within 33 months after
its acquisition by the Trust Fund or if such an extension, has been received and
the Depositor or the Servicer is unable to sell the REO Property within the
period ending three months before the close of the Extended Period, the
Depositor shall cause the Servicer, before the end of the three year period or
the Extended Period, as applicable, to (i) purchase such REO Property at a price
equal to the REO Property's fair market value or (ii) auction the REO Property
to the highest bidder (which may be the Servicer) in an auction reasonably
designed to produce a fair price prior to the expiration of the three-year
period or the Extended Period, as the case may be.


                                      -122-

<PAGE>

     IN WITNESS WHEREOF, the Depositor, the Trustee, the Master Servicer and the
Securities Administrator have caused their names to be signed hereto by their
respective officers thereunto duly authorized as of the day and year first above
written.

                                        MERRILL LYNCH MORTGAGE INVESTORS, INC.,
                                        as Depositor


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


                                        HSBC BANK USA, NATIONAL ASSOCIATION,
                                        as Trustee


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


                                        WELLS FARGO BANK, N.A.,
                                        as Master Servicer


                                        By:
                                            ------------------------------------
                                        Name: Michael Pinzon
                                        Title: Assistant Vice President


                                        WELLS FARGO BANK, N.A.,
                                        as Securities Administrator


                                        By:
                                            ------------------------------------
                                        Name: Michael Pinzon
                                        Title: Assistant Vice President


                                       123
<PAGE>

                                   EXHIBIT A-1

                FORM OF CLASS [__]-A-[__] and M-[__] CERTIFICATE

SOLELY FOR FEDERAL INCOME TAX PURPOSES, THIS CERTIFICATE REPRESENTS A "REGULAR
INTEREST" IN A "REAL ESTATE MORTGAGE INVESTMENT CONDUIT", AS THOSE TERMS ARE
DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL REVENUE CODE OF
1986, AS AMENDED.

THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN THE
DEPOSITOR, THE TRUSTEE, THE MASTER SERVICER OR THE SECURITIES ADMINISTRATOR
REFERRED TO BELOW OR ANY OF THEIR AFFILIATES. NONE OF THIS CERTIFICATE, THE
REMIC REGULAR INTEREST REPRESENTED HEREBY OR THE UNDERLYING MORTGAGE LOANS ARE
GUARANTEED OR INSURED BY THE DEPOSITOR, THE TRUSTEE, THE MASTER SERVICER, THE
SECURITIES ADMINISTRATOR OR BY ANY OF THEIR AFFILIATES OR BY ANY GOVERNMENTAL
AGENCY OR INSTRUMENTALITY.

FOLLOWING THE INITIAL ISSUANCE OF THE CERTIFICATES, THE PRINCIPAL BALANCE OF
THIS CERTIFICATE MAY BE DIFFERENT FROM THE ORIGINAL DENOMINATION SHOWN BELOW.
ANYONE ACQUIRING THIS CERTIFICATE MAY ASCERTAIN ITS CURRENT PRINCIPAL BALANCE BY
INQUIRY OF THE SECURITIES ADMINISTRATOR.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY TO THE DEPOSITOR OR ITS AGENT FOR REGISTRATION OF
TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE
NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT IS MADE TO CEDE &
CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO
ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN
INTEREST HEREIN.

IF ANY BOOK-ENTRY CERTIFICATE (OR ANY INTEREST THEREIN) IS ACQUIRED OR HELD IN
VIOLATION OF THE CERTIFICATE TRANSFER RESTRICTIONS IN THE AGREEMENT, THEN THE
LAST PRECEDING TRANSFEREE THAT IS IN COMPLIANCE WITH SUCH PROVISIONS SHALL BE
RESTORED, TO THE EXTENT PERMITTED BY LAW, TO ALL RIGHTS AND OBLIGATIONS AS
CERTIFICATE OWNER THEREOF RETROACTIVE TO THE DATE OF SUCH TRANSFER OF SUCH
CERTIFICATE. NEITHER THE TRUSTEE NOR THE SECURITIES ADMINISTRATOR SHALL BE UNDER
ANY LIABILITY TO ANY PERSON FOR MAKING ANY PAYMENTS DUE ON SUCH CERTIFICATE TO
SUCH PRECEDING TRANSFEREE.


                                     A-1-1

<PAGE>

ANY PURPORTED CERTIFICATE OWNER WHOSE ACQUISITION OR HOLDING OF ANY BOOK-ENTRY
CERTIFICATE (OR INTEREST THEREIN) WAS EFFECTED IN VIOLATION OF THE CERTIFICATE
TRANSFER RESTRICTIONS IN THE AGREEMENT SHALL INDEMNIFY AND HOLD HARMLESS THE
DEPOSITOR, THE TRUSTEE, THE SECURITIES ADMINISTRATOR, THE MASTER SERVICER AND
THE TRUST FUND FROM AND AGAINST ANY AND ALL LIABILITIES, CLAIMS, COSTS OR
EXPENSES INCURRED BY SUCH PARTIES AS A RESULT OF SUCH ACQUISITION OR HOLDING.


                                     A-1-2

<PAGE>

<TABLE>
<S>                                   <C>
MLMBS Series 2007-1, Class [___]      Aggregate Certificate Principal Balance of
                                      the Class [___] Certificates as of the
                                      Issue Date: $[_______]

Pass-Through Rate: Variable(1)        Initial Certificate Principal Balance of
                                      this Class [___] Certificate as of the
                                      Issue Date: $[_________]

Date of Agreement and Cut-off Date:   Master Servicer and Securities
March 1, 2007                         Administrator: Wells Fargo Bank, N.A.

First Distribution Date: [_____]      Trustee: HSBC Bank USA, National
                                      Association

No. 07-1-[___]-[___]                  Issue Date: [______]

                                      CUSIP: [____]
</TABLE>

     DISTRIBUTIONS IN REDUCTION OF THE CERTIFICATE PRINCIPAL BALANCE OF THIS
     CERTIFICATE MAY BE MADE MONTHLY AS SET FORTH HEREIN. ACCORDINGLY, THE
     OUTSTANDING CERTIFICATE PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS
     THAN THE AMOUNT SHOWN ABOVE AS THE DENOMINATION OF THIS CERTIFICATE.

                        MORTGAGE PASS-THROUGH CERTIFICATE
                               MLMBS SERIES 2007-1

evidencing a beneficial ownership interest in a Trust Fund (the "Trust Fund")
consisting primarily of two pools of conventional, one- to four-family,
adjustable-rate, fully amortizing mortgage loans secured by first liens on
residential property (the "Mortgage Loans") formed and sold by

                     MERRILL LYNCH MORTGAGE INVESTORS, INC.

     THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN MERRILL
     LYNCH MORTGAGE INVESTORS, INC., THE MASTER SERVICER, THE SECURITIES
     ADMINISTRATOR, THE TRUSTEE OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER
     THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE LOANS ARE GUARANTEED BY ANY
     AGENCY OR INSTRUMENTALITY OF THE UNITED STATES.

          This certifies that CEDE & CO. is the registered owner of a Percentage
Interest obtained by dividing the denomination of this Certificate by the
aggregate Certificate Principal

----------
(1)  As described in the Agreement referenced herein.


                                      A-1-3

<PAGE>

Balance of the Class [__] Certificates as of the Issue Date in that certain
beneficial ownership interest evidenced by all the Class [__] Certificates in
the Trust Fund created pursuant to a Pooling and Servicing Agreement, dated as
specified above (the "Agreement"), among Merrill Lynch Mortgage Investors, Inc.,
as depositor (hereinafter called the "Depositor," which term includes any
successor entity under the Agreement), Wells Fargo Bank, N.A., as master
servicer (in such capacity, the "Master Servicer") and securities administrator
(in such capacity, the "Securities Administrator") and HSBC Bank USA, National
Association, as trustee (the "Trustee"), a summary of certain of the pertinent
provisions of which is set forth hereafter. To the extent not defined herein,
the capitalized terms used herein have the meanings assigned in the Agreement.
This Certificate is issued under and is subject to the terms, provisions and
conditions of the Agreement, to which Agreement the Holder of this Certificate
by virtue of the acceptance hereof assents and by which such Holder is bound.

          Interest on this Certificate will accrue during the period specified
in the Agreement on the Certificate Principal Balance hereof at a per annum rate
equal to the variable Pass-Through Rate described in the Agreement.

          Pursuant to the terms of the Agreement, distributions will be made on
the 25th day of each month or, if such 25th day is not a Business Day, the
Business Day immediately following (each, a "Distribution Date"), commencing on
the First Distribution Date specified above, to the Person in whose name this
Certificate is registered on the Record Date, in an amount equal to the product
of the Percentage Interest evidenced by this Certificate and the amount required
to be distributed to the Holders of Class [__] Certificates on such Distribution
Date pursuant to the Agreement.

          All distributions to the Holder of this Certificate under the
Agreement will be made or caused to be made by the Securities Administrator by
wire transfer in immediately available funds to the account of the Person
entitled thereto if such Person shall have so notified the Securities
Administrator in writing at least five Business Days prior to the Record Date
immediately prior to such Distribution Date and is the registered owner of Class
[__] Certificates, or otherwise by check mailed by first class mail to the
address of the Person entitled thereto, as such name and address shall appear on
the Certificate Register. Notwithstanding the above, the final distribution on
this Certificate will be made after due notice by the Securities Administrator
of the pendency of such distribution and only upon the presentation and
surrender of this Certificate at the office or agency appointed by the
Securities Administrator for that purpose as provided in the Agreement.

          If any Book-Entry Certificate (or any interest therein) is acquired or
held in violation of the Certificate transfer restrictions in the Agreement,
then the last preceding Transferee that is in compliance with such provisions
shall be restored, to the extent permitted by law, to all rights and obligations
as Certificate Owner thereof retroactive to the date of such Transfer of such
Certificate. Neither the Trustee nor the Securities Administrator shall be under
any liability to any Person for making any payments due on such Certificate to
such preceding Transferee.

          Any purported Certificate Owner whose acquisition or holding of any
Book-Entry Certificate (or interest therein) was effected in violation of the
Certificate transfer restrictions in


                                     A-1-4

<PAGE>

the Agreement shall indemnify and hold harmless the Depositor, the Trustee, the
Securities Administrator, the Master Servicer and the Trust Fund from and
against any and all liabilities, claims, costs or expenses incurred by such
parties as a result of such acquisition or holding.

          This Certificate is one of a duly authorized issue of Certificates
designated as Mortgage Pass-Through Certificates of the Series specified on the
face hereof (herein called the "Certificates") and representing a Percentage
Interest in the Class of Certificates specified on the face hereof equal to the
denomination specified on the face hereof divided by the aggregate Certificate
Principal Balance of the Class of Certificates specified on the face hereof.

          The Certificates are limited in right of payment to certain
collections and recoveries respecting the Mortgage Loans, all as more
specifically set forth herein and in the Agreement. As provided in the
Agreement, withdrawals from the Master Servicer Collection Account and the
Distribution Account may be made from time to time for purposes other than
distributions to Holders of the Certificates, such purposes including
reimbursement of advances made, or certain expenses incurred, with respect to
the Mortgage Loans.

          The Agreement permits, with certain exceptions and conditions provided
therein, the amendment thereof and the modification of the rights and
obligations of the Depositor, the Securities Administrator, the Master Servicer
and the Trustee and the rights of the Holders of the Certificates under the
Agreement at any time by the Depositor, the Securities Administrator, the Master
Servicer and the Trustee, with the consent of the Holders of Certificates
evidencing Percentage Interests aggregating not less than 51% of the Trust Fund
or of the applicable Class or Classes, if such amendment affects only such Class
or Classes, for the purpose of adding any provisions to or changing in any
manner or eliminating any of the provisions of this Agreement or of modifying in
any manner the rights of the Certificateholders. Any such consent by the Holder
of this Certificate shall be conclusive and binding on such Holder and upon all
future Holders of this Certificate and of any Certificate issued upon the
transfer hereof or in exchange herefor or in lieu hereof whether or not notation
of such consent is made upon this Certificate. The Agreement also permits the
amendment thereof, in certain limited circumstances, without the consent of the
Holders of any of the Certificates.

          As provided in the Agreement and subject to certain limitations set
forth therein, the transfer of this Certificate is registrable in the
Certificate Register upon surrender of this Certificate for registration of
transfer at the offices or agencies appointed by the Securities Administrator as
provided in the Agreement, duly endorsed by, or accompanied by an assignment in
the form below or other written instrument of transfer in form satisfactory to
the Securities Administrator and the Certificate Registrar duly executed by, the
Holder hereof or such Holder's attorney duly authorized in writing, and
thereupon one or more new Certificates of the same Class in authorized
denominations evidencing the same aggregate Percentage Interest will be issued
to the designated transferee or transferees.

          The Certificates are issuable in fully registered form only without
coupons in Classes and denominations representing Percentage Interests specified
in the Agreement. As provided in the Agreement and subject to certain
limitations set forth therein, Certificates are exchangeable for new
Certificates of the same Class in authorized denominations evidencing the same
aggregate Percentage Interest, as requested by the Holder surrendering the same.


                                     A-1-5

<PAGE>

          No service charge will be made for any such registration of transfer
or exchange of Certificates, but the Certificate Registrar may require payment
of a sum sufficient to cover any tax or other governmental charge that may be
imposed in connection with any transfer or exchange of Certificates.

          The Depositor, the Securities Administrator, the Master Servicer, the
Trustee and the Certificate Registrar and any agent of the Depositor, the
Securities Administrator, the Master Servicer, the Trustee or the Certificate
Registrar may treat the Person in whose name this Certificate is registered as
the owner hereof for all purposes, and none of the Depositor, the Securities
Administrator, the Master Servicer, the Trustee, the Certificate Registrar nor
any such agent shall be affected by notice to the contrary.

          This certificate shall be governed by and construed in accordance with
the laws of the state of New York.

          The obligations created by the Agreement and the Trust Fund created
thereby shall terminate upon payment (or provision for payment) to the Holders
of the Certificates of all amounts held by the Securities Administrator and
required to be paid to them pursuant to the Agreement following the earlier of
(i) the Distribution Date on which the Certificate Principal Balance of each
Class of Certificates has been reduced to zero, (ii) the final payment (or any
advance with respect thereto) on or other liquidation of the last Mortgage Loan
remaining in the Trust Fund and (iii) the Optional Termination of the trust fund
according to the procedures described in the Agreement.

          The recitals contained herein shall be taken as statements of the
Depositor and the Securities Administrator assumes no responsibility for their
correctness.

          Unless the certificate of authentication hereon has been executed by
the Certificate Registrar, by manual signature, this Certificate shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


                                     A-1-6

<PAGE>

     IN WITNESS WHEREOF, the Securities Administrator has caused this
Certificate to be duly executed.

                                        WELLS FARGO BANK, N.A.,
                                        as Securities Administrator


                                        By:
                                            ------------------------------------
                                            AUTHORIZED SIGNATORY

                                        Dated: [           ]
                                                -----------

              SECURITIES ADMINISTRATOR'S CERTIFICATE AUTHENTICATION

This is one of the Certificates referred to in the within-mentioned Agreement.

                                        WELLS FARGO BANK, N.A.,
                                        as Authenticating Agent


                                        By:
                                            ------------------------------------
                                            AUTHORIZED SIGNATORY

                                        Dated: [           ]
                                                -----------

                                     A-1-7

<PAGE>

                                  ABBREVIATIONS

     The following abbreviations, when used in the inscription on the face of
this instrument, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
<S>         <C>                              <C>                   <C>
TEN COM -   as tenants in common             UNIF GIFT MIN ACT -          CUSTODIAN

TEN ENT -   as tenants by the entireties                               (Cust) (Minor)
                                                                   under Uniform Gifts to
                                                                         Minors Act

JT TEN -    as joint tenants with right of                             ______________
            survivorship and not as                                       (State)
            tenants in common
</TABLE>

     Additional abbreviations may also be used though not in the above list.

                                   ASSIGNMENT

     FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
transfer(s) unto _______________________________________________________________

____________________________________________________________________________.
(Please print or typewrite name, address including postal zip code, and Taxpayer
                       Identification Number of assignee)

the Percentage Interest evidenced by the Mortgage Pass-Through Certificate and
hereby authorize(s) the registration of transfer of such interest to assignee on
the Certificate Register of the Trust Fund.

     I (we) further direct the Certificate Registrar to issue a new Certificate
of a like Percentage Interest and Class to the above named assignee and deliver
such Certificate to the following address:

________________________________________________________________________________

___________________________________________________________________________.

Dated:
       -----------------------------


                                        ----------------------------------------
                                        Signature by or on behalf of assignor


                                        ----------------------------------------
                                        Signature Guaranteed


                                     A-1-8

<PAGE>

                            DISTRIBUTION INSTRUCTIONS

     The assignee should include the following for purposes of distribution:

     Distributions shall be made, by wire transfer or otherwise, in immediately
available funds

to ___________________________________________________________________,

for the account of ___________________________________________________,

account number ___________, or, if mailed by check, to _______________,

Applicable statements should be mailed to ____________________________,

______________________________________________________________________.

This information is provided by ______________________________________,

the assignee named above, or _________________________________________,

as its agent. _________________________________________________________


                                     A-1-9
<PAGE>

                                   EXHIBIT A-2

                       CLASS B-[__] RULE 144A CERTIFICATE

SOLELY FOR FEDERAL INCOME TAX PURPOSES, THIS CERTIFICATE REPRESENTS A "REGULAR
INTEREST" IN A "REAL ESTATE MORTGAGE INVESTMENT CONDUIT", AS THOSE TERMS ARE
DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL REVENUE CODE OF
1986, AS AMENDED.

THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN THE
DEPOSITOR, THE TRUSTEE, THE MASTER SERVICER OR THE SECURITIES ADMINISTRATOR
REFERRED TO BELOW OR ANY OF THEIR AFFILIATES. NONE OF THIS CERTIFICATE, THE
REMIC REGULAR INTEREST REPRESENTED HEREBY OR THE UNDERLYING MORTGAGE LOANS ARE
GUARANTEED OR INSURED BY THE DEPOSITOR, THE TRUSTEE, THE MASTER SERVICER, THE
SECURITIES ADMINISTRATOR OR BY ANY OF THEIR AFFILIATES OR BY ANY GOVERNMENTAL
AGENCY OR INSTRUMENTALITY.

FOLLOWING THE INITIAL ISSUANCE OF THE CERTIFICATES, THE PRINCIPAL BALANCE OF
THIS CERTIFICATE MAY BE DIFFERENT FROM THE ORIGINAL DENOMINATION SHOWN BELOW.
ANYONE ACQUIRING THIS CERTIFICATE MAY ASCERTAIN ITS CURRENT PRINCIPAL BALANCE BY
INQUIRY OF THE SECURITIES ADMINISTRATOR.

THIS CERTIFICATE IS SUBORDINATE TO THE SENIOR CERTIFICATES, THE CLASS M
CERTIFICATES AND THE RESIDUAL CERTIFICATES TO THE EXTENT DESCRIBED IN THE
AGREEMENT REFERRED TO HEREIN.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY TO THE DEPOSITOR OR ITS AGENT FOR REGISTRATION OF
TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE
NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT IS MADE TO CEDE &
CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO
ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN
INTEREST HEREIN.

IF ANY BOOK-ENTRY CERTIFICATE (OR ANY INTEREST THEREIN) IS ACQUIRED OR HELD IN
VIOLATION OF THE CERTIFICATE TRANSFER RESTRICTIONS IN THE AGREEMENT, THEN THE
LAST PRECEDING TRANSFEREE THAT IS IN COMPLIANCE WITH SUCH PROVISIONS SHALL BE
RESTORED, TO THE EXTENT PERMITTED BY LAW, TO ALL RIGHTS AND


                                        1

<PAGE>

OBLIGATIONS AS CERTIFICATE OWNER THEREOF RETROACTIVE TO THE DATE OF SUCH
TRANSFER OF SUCH CERTIFICATE. NEITHER THE TRUSTEE NOR THE SECURITIES
ADMINISTRATOR SHALL BE UNDER ANY LIABILITY TO ANY PERSON FOR MAKING ANY PAYMENTS
DUE ON SUCH CERTIFICATE TO SUCH PRECEDING TRANSFEREE.

ANY PURPORTED CERTIFICATE OWNER WHOSE ACQUISITION OR HOLDING OF ANY BOOK-ENTRY
CERTIFICATE (OR INTEREST THEREIN) WAS EFFECTED IN VIOLATION OF THE CERTIFICATE
TRANSFER RESTRICTIONS IN THE AGREEMENT SHALL INDEMNIFY AND HOLD HARMLESS THE
DEPOSITOR, THE TRUSTEE, THE SECURITIES ADMINISTRATOR, THE MASTER SERVICER AND
THE TRUST FUND FROM AND AGAINST ANY AND ALL LIABILITIES, CLAIMS, COSTS OR
EXPENSES INCURRED BY SUCH PARTIES AS A RESULT OF SUCH ACQUISITION OR HOLDING.

NO TRANSFER OF THIS CERTIFICATE SHALL BE REGISTERED UNLESS THE PROSPECTIVE
TRANSFEREE PROVIDES THE SECURITIES ADMINISTRATOR WITH (A) A REPRESENTATION THAT
SUCH TRANSFEREE IS NOT AN EMPLOYEE BENEFIT PLAN OR OTHER ARRANGEMENT SUBJECT TO
TITLE I OF THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED
("ERISA"), A PLAN SUBJECT TO SECTION 4975 OF THE INTERNAL REVENUE CODE OF 1986,
AS AMENDED (THE "CODE") OR A PLAN SUBJECT TO ANY PROVISION UNDER ANY FEDERAL,
STATE, LOCAL, NON-U.S. OR OTHER LAWS OR REGULATIONS THAT ARE SUBSTANTIVELY
SIMILAR TO THE FOREGOING PROVISIONS OF ERISA OR THE CODE ("SIMILAR LAW")
(COLLECTIVELY, A "PLAN"), AND IS NOT DIRECTLY OR INDIRECTLY ACQUIRING THIS
CERTIFICATE FOR, ON BEHALF OF, OR WITH ANY ASSETS OF ANY SUCH PLAN, (B) IF THIS
CERTIFICATE HAS BEEN THE SUBJECT OF AN ERISA-QUALIFYING UNDERWRITING, A
REPRESENTATION THAT SUCH TRANSFEREE IS AN INSURANCE COMPANY THAT IS ACQUIRING
THIS CERTIFICATE WITH ASSETS OF AN "INSURANCE COMPANY GENERAL ACCOUNT" AS
DEFINED IN SECTION V(E) OF PROHIBITED TRANSACTION CLASS EXEMPTION ("PTCE") 95-60
AND THE ACQUISITION AND HOLDING OF THIS CERTIFICATE ARE COVERED AND EXEMPT UNDER
SECTIONS I AND III OF PTCE 95-60 OR (C) SOLELY IN THE CASE OF A DEFINITIVE
CERTIFICATE, AN OPINION OF COUNSEL SATISFACTORY TO THE SECURITIES ADMINISTRATOR,
AND UPON WHICH THE SECURITIES ADMINISTRATOR SHALL BE ENTITLED TO RELY, TO THE
EFFECT THAT THE ACQUISITION AND HOLDING OF THIS CERTIFICATE BY THE PROSPECTIVE
TRANSFEREE WILL NOT CONSTITUTE OR RESULT IN A NONEXEMPT PROHIBITED TRANSACTION
UNDER ERISA OR THE CODE, OR A VIOLATION OF SIMILAR LAW, AND WILL NOT SUBJECT THE
TRUSTEE, THE SECURITIES ADMINISTRATOR, THE CERTIFICATE REGISTRAR, THE MASTER
SERVICER, ANY SERVICER OR THE DEPOSITOR TO ANY OBLIGATION IN ADDITION TO THOSE
UNDERTAKEN BY SUCH ENTITIES IN THE AGREEMENT, WHICH OPINION OF COUNSEL SHALL NOT
BE AN EXPENSE OF THE TRUSTEE, THE SECURITIES ADMINISTRATOR,


                                        2

<PAGE>

THE CERTIFICATE REGISTRAR, THE MASTER SERVICER, ANY SERVICER OR THE DEPOSITOR.
IF THE CERTIFICATE IS NOT A DEFINITIVE CERTIFICATE, THE TRANSFEREE IS DEEMED TO
HAVE MADE THE REPRESENTATION IN (A) OR (B) ABOVE.

THIS CERTIFICATE HAS NOT BEEN AND WILL NOT BE REGISTERED UNDER THE SECURITIES
ACT OF 1933, AS AMENDED, OR THE SECURITIES LAWS OF ANY STATE AND MAY NOT BE
RESOLD OR TRANSFERRED UNLESS IT IS REGISTERED PURSUANT TO SUCH ACT AND LAWS OR
IS SOLD OR TRANSFERRED IN TRANSACTIONS THAT ARE EXEMPT FROM REGISTRATION UNDER
SUCH ACT AND UNDER APPLICABLE STATE LAW AND IS TRANSFERRED IN ACCORDANCE WITH
THE CERTIFICATE TRANSFER RESTRICTIONS IN THE AGREEMENT.


                                        3

<PAGE>

<TABLE>
<S>                                     <C>
MLMBS Series 2007-1, Class B-[__]       Aggregate  Certificate  Principal
(RULE 144A)                             Balance of Class B-[__] Certificates as
                                        of the Issue Date: $[__________]

Pass Through Rate: Variable(1)          Initial Class Certificate Principal
                                        Balance of this Class B-[__] Certificate
                                        as of the Issue Date: $[__________]

Date of Agreement and Cut-off Date:     Master Servicer and Securities
March 1, 2007                           Administrator: Wells Fargo Bank, N.A.

First Distribution Date: [__________]   Trustee: HSBC Bank USA, National
                                        Association

No. 07-1-B-[__]-(144A)-[__]             Issue Date: [__________]

                                        CUSIP: [__________]
</TABLE>

     DISTRIBUTIONS IN REDUCTION OF THE CERTIFICATE PRINCIPAL BALANCE OF THIS
     CERTIFICATE MAY BE MADE MONTHLY AS SET FORTH HEREIN. ACCORDINGLY, THE
     OUTSTANDING CERTIFICATE PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS
     THAN THE AMOUNT SHOWN ABOVE AS THE DENOMINATION OF THIS CERTIFICATE.

                        MORTGAGE PASS-THROUGH CERTIFICATE
                               MLMBS SERIES 2007-1

evidencing a beneficial ownership interest in a Trust Fund (the "Trust Fund")
consisting primarily of two pools of conventional, one- to four-family,
adjustable-rate, fully amortizing mortgage loans secured by first liens on
residential property (the "Mortgage Loans") formed and sold by

                     MERRILL LYNCH MORTGAGE INVESTORS, INC.

     THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN MERRILL
     LYNCH MORTGAGE INVESTORS, INC., THE MASTER SERVICER, THE SECURITIES
     ADMINISTRATOR, THE TRUSTEE OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER
     THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE LOANS ARE GUARANTEED BY ANY
     AGENCY OR INSTRUMENTALITY OF THE UNITED STATES.

----------
(1)  As described in the Agreement referenced herein.


                                        4

<PAGE>

          This certifies that CEDE & CO. is the registered owner of a Percentage
Interest (obtained by dividing the denomination of this Certificate by the
aggregate Certificate Principal Balance of the Class B-[__] Certificates as of
the Issue Date) in that certain beneficial ownership interest evidenced by all
the Class B-[__] Certificates in the Trust Fund created pursuant to a Pooling
and Servicing Agreement, dated as specified above (the "Agreement"), among
Merrill Lynch Mortgage Investors, Inc., as depositor (hereinafter called the
"Depositor," which term includes any successor entity under the Agreement),
Wells Fargo Bank, N.A., as master servicer (in such capacity, the "Master
Servicer") and securities administrator (in such capacity, the "Securities
Administrator") and HSBC Bank USA, National Association, as trustee (the
"Trustee"), a summary of certain of the pertinent provisions of which is set
forth hereafter. To the extent not defined herein, the capitalized terms used
herein have the meanings assigned in the Agreement. This Certificate is issued
under and is subject to the terms, provisions and conditions of the Agreement,
to which Agreement the Holder of this Certificate by virtue of the acceptance
hereof assents and by which such Holder is bound.

          Interest on this Certificate will accrue during the period specified
in the Agreement on the Certificate Principal Balance hereof at a per annum rate
equal to the variable Pass-Through Rate described in the Agreement.

          Pursuant to the terms of the Agreement, distributions will be made on
the 25th day of each month or, if such 25th day is not a Business Day, the
Business Day immediately following (each, a "Distribution Date"), commencing on
the First Distribution Date specified above, to the Person in whose name this
Certificate is registered on the Record Date, in an amount equal to the product
of the Percentage Interest evidenced by this Certificate and the amount required
to be distributed to the Holders of Class B-[__] Certificates on such
Distribution Date pursuant to the Agreement.

          All distributions to the Holder of this Certificate under the
Agreement will be made or caused to be made by the Securities Administrator by
wire transfer in immediately available funds to the account of the Person
entitled thereto if such Person shall have so notified the Securities
Administrator in writing at least five Business Days prior to the Record Date
immediately prior to such Distribution Date and is the registered owner of Class
B-[__] Certificates, or otherwise by check mailed by first class mail to the
address of the Person entitled thereto, as such name and address shall appear on
the Certificate Register. Notwithstanding the above, the final distribution on
this Certificate will be made after due notice by the Securities Administrator
of the pendency of such distribution and only upon the presentation and
surrender of this Certificate at the office or agency appointed by the
Securities Administrator for that purpose as provided in the Agreement.

          If any Book-Entry Certificate (or any interest therein) is acquired or
held in violation of the Certificate transfer restrictions in the Agreement,
then the last preceding Transferee that is in compliance with such provisions
shall be restored, to the extent permitted by law, to all rights and obligations
as Certificate Owner thereof retroactive to the date of such Transfer of such
Certificate. Neither the Trustee nor the Securities Administrator shall be under
any liability to any Person for making any payments due on such Certificate to
such preceding Transferee.


                                        5

<PAGE>

          Any purported Certificate Owner whose acquisition or holding of any
Book-Entry Certificate (or interest therein) was effected in violation of the
Certificate transfer restrictions in the Agreement shall indemnify and hold
harmless the Depositor, the Trustee, the Securities Administrator, the Master
Servicer and the Trust Fund from and against any and all liabilities, claims,
costs or expenses incurred by such parties as a result of such acquisition or
holding.

          This Certificate is one of a duly authorized issue of Certificates
designated as Mortgage Pass-Through Certificates of the Series specified on the
face hereof (herein called the "Certificates") and representing a Percentage
Interest in the Class of Certificates specified on the face hereof equal to the
denomination specified on the face hereof divided by the aggregate Certificate
Principal Balance of the Class of Certificates specified on the face hereof.

          The Certificates are limited in right of payment to certain
collections and recoveries respecting the Mortgage Loans, all as more
specifically set forth herein and in the Agreement. As provided in the
Agreement, withdrawals from the Master Servicer Collection Account and the
Distribution Account may be made from time to time for purposes other than
distributions to Holders of the Certificates, such purposes including
reimbursement of advances made, or certain expenses incurred, with respect to
the Mortgage Loans.

          The Agreement permits, with certain exceptions and conditions provided
therein, the amendment thereof and the modification of the rights and
obligations of the Depositor, the Securities Administrator, the Master Servicer
and the Trustee and the rights of the Holders of the Certificates under the
Agreement at any time by the Depositor, the Securities Administrator, the Master
Servicer and the Trustee, with the consent of the Holders of Certificates
evidencing Percentage Interests aggregating not less than 51% of the Trust Fund
or of the applicable Class or Classes, if such amendment affects only such Class
or Classes, for the purpose of adding any provisions to or changing in any
manner or eliminating any of the provisions of this Agreement or of modifying in
any manner the rights of the Certificateholders. Any such consent by the Holder
of this Certificate shall be conclusive and binding on such Holder and upon all
future Holders of this Certificate and of any Certificate issued upon the
transfer hereof or in exchange herefor or in lieu hereof whether or not notation
of such consent is made upon this Certificate. The Agreement also permits the
amendment thereof, in certain limited circumstances, without the consent of the
Holders of any of the Certificates.

          As provided in the Agreement and subject to certain limitations set
forth therein, the transfer of this Certificate is registrable in the
Certificate Register upon surrender of this Certificate for registration of
transfer at the offices or agencies appointed by the Securities Administrator as
provided in the Agreement, duly endorsed by, or accompanied by an assignment in
the form below or other written instrument of transfer in form satisfactory to
the Securities Administrator and the Certificate Registrar duly executed by, the
Holder hereof or such Holder's attorney duly authorized in writing, and
thereupon one or more new Certificates of the same Class in authorized
denominations evidencing the same aggregate Percentage Interest will be issued
to the designated transferee or transferees.


                                        6

<PAGE>

          The Certificates are issuable in fully registered form only without
coupons in Classes and denominations representing Percentage Interests specified
in the Agreement. As provided in the Agreement and subject to certain
limitations set forth therein, Certificates are exchangeable for new
Certificates of the same Class in authorized denominations evidencing the same
aggregate Percentage Interest, as requested by the Holder surrendering the same.

          No transfer of this Certificate shall be made unless the transfer is
made pursuant to an effective registration statement under the Securities Act of
1933, as amended (the "1933 Act"), and any applicable state securities laws or
is exempt from the registration requirements under the 1933 Act and such state
securities laws. .In the event that a transfer is to be made in reliance upon an
exemption from the 1933 Act and such laws, the Certificateholder desiring to
effect such transfer and such Certificateholder's prospective transferee shall
each certify to the Securities Administrator in writing the facts surrounding
the transfer in a Transferor Representation Letter as described in the Agreement
and (i) deliver to the Securities Administrator an Investor Representation
Letter or Rule 144A Letter as described in the Agreement or (ii) have delivered
to the Securities Administrator an Opinion of Counsel that such transfer may be
made pursuant to an exemption from the Securities Act, which Opinion of Counsel
shall not be an expense of the Depositor or the Securities Administrator. Any
Certificateholder desiring to effect a transfer of this Certificate shall
indemnify the Securities Administrator and the Depositor against any liability
that may result if the transfer is not so exempt or is not made in accordance
with such federal and state laws.

          No service charge will be made for any such registration of transfer
or exchange of Certificates, but the Certificate Registrar may require payment
of a sum sufficient to cover any tax or other governmental charge that may be
imposed in connection with any transfer or exchange of Certificates.

          The Depositor, the Securities Administrator, the Master Servicer, the
Trustee and the Certificate Registrar and any agent of the Depositor, the
Securities Administrator, the Master Servicer, the Trustee or the Certificate
Registrar may treat the Person in whose name this Certificate is registered as
the owner hereof for all purposes, and none of the Depositor, the Securities
Administrator, the Master Servicer, the Trustee, the Certificate Registrar nor
any such agent shall be affected by notice to the contrary.

          This certificate shall be governed by and construed in accordance with
the laws of the state of New York.

          The obligations created by the Agreement and the Trust Fund created
thereby shall terminate upon payment (or provision for payment) to the Holders
of the Certificates of all amounts held by the Securities Administrator and
required to be paid to them pursuant to the Agreement following the earlier of
(i) the Distribution Date on which the Certificate Principal Balance of each
Class of Certificates has been reduced to zero, (ii) the final payment (or any
advance with respect thereto) on or other liquidation of the last Mortgage Loan
remaining in the Trust Fund and (iii) the Optional Termination of the trust fund
according to the procedures described in the Agreement.


                                        7

<PAGE>

          The recitals contained herein shall be taken as statements of the
Depositor and the Securities Administrator assumes no responsibility for their
correctness.

          Unless the certificate of authentication hereon has been executed by
the Certificate Registrar, by manual signature, this Certificate shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


                                        8

<PAGE>

     IN WITNESS WHEREOF, the Securities Administrator has caused this
Certificate to be duly executed.

                                        WELLS FARGO BANK, N.A.,
                                        as Securities Administrator


                                        By:
                                            ------------------------------------
                                            AUTHORIZED SIGNATORY

                                        Dated: [          ]
                                                ----------

              SECURITIES ADMINISTRATOR'S CERTIFICATE AUTHENTICATION

This is one of the Certificates referred to in the within-mentioned Agreement.

                                        WELLS FARGO BANK, N.A.,
                                        as Authenticating Agent


                                        By:
                                            ------------------------------------
                                            AUTHORIZED SIGNATORY

                                        Dated: [          ]
                                                ----------


                                        9

<PAGE>

                                  ABBREVIATIONS

     The following abbreviations, when used in the inscription on the face of
this instrument, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
<S>         <C>                            <C>                   <C>
TEN COM -   as tenants in common           UNIF GIFT MIN ACT -         CUSTODIAN

TEN ENT -   as tenants by the entireties                             (Cust) (Minor)
                                                                 under Uniform Gifts to
                                                                       Minors Act

JT TEN -    as joint tenants with right                              ______________
            of survivorship and not as                                   (State)
            tenants in common
</TABLE>

     Additional abbreviations may also be used though not in the above list.

                                   ASSIGNMENT

     FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
transfer(s) unto _______________________________________________________________

______________________________________________________________________________.
(Please print or typewrite name, address including postal zip code, and Taxpayer
Identification Number of assignee)

the Percentage Interest evidenced by the Mortgage Pass-Through Certificate and
hereby authorize(s) the registration of transfer of such interest to assignee on
the Certificate Register of the Trust Fund.

     I (we) further direct the Certificate Registrar to issue a new Certificate
of a like Percentage Interest and Class to the above named assignee and deliver
such Certificate to the following address:
________________________________________________________________________________

______________________________________________________________________________ .

Dated:
      ----------

                                        ----------------------------------------
                                        Signature by or on behalf of assignor


                                        ----------------------------------------
                                        Signature Guaranteed


                                       10

<PAGE>

                            DISTRIBUTION INSTRUCTIONS

     The assignee should include the following for purposes of distribution:

     Distributions shall be made, by wire transfer or otherwise, in immediately
available funds

to __________________________________________________________________________,

for the account of __________________________________________________________,

account number __________, or, if mailed by check, to _______________________,

Applicable statements should be mailed to ___________________________________,

_____________________________________________________________________________.

This information is provided by _____________________________________________,

the assignee named above, or ________________________________________________,
as its agent.


                                       11

<PAGE>

                      FORM OF CLASS B-[_] REG S CERTIFICATE

SOLELY FOR FEDERAL INCOME TAX PURPOSES, THIS CERTIFICATE REPRESENTS A "REGULAR
INTEREST" IN A "REAL ESTATE MORTGAGE INVESTMENT CONDUIT", AS THOSE TERMS ARE
DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL REVENUE CODE OF
1986, AS AMENDED.

THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN THE
DEPOSITOR, THE TRUSTEE, THE MASTER SERVICER OR THE SECURITIES ADMINISTRATOR
REFERRED TO BELOW OR ANY OF THEIR AFFILIATES. NONE OF THIS CERTIFICATE, THE
REMIC REGULAR INTEREST REPRESENTED HEREBY OR THE UNDERLYING MORTGAGE LOANS ARE
GUARANTEED OR INSURED BY THE DEPOSITOR, THE TRUSTEE, THE MASTER SERVICER, THE
SECURITIES ADMINISTRATOR OR BY ANY OF THEIR AFFILIATES OR BY ANY GOVERNMENTAL
AGENCY OR INSTRUMENTALITY.

FOLLOWING THE INITIAL ISSUANCE OF THE CERTIFICATES, THE PRINCIPAL BALANCE OF
THIS CERTIFICATE MAY BE DIFFERENT FROM THE ORIGINAL DENOMINATION SHOWN BELOW.
ANYONE ACQUIRING THIS CERTIFICATE MAY ASCERTAIN ITS CURRENT PRINCIPAL BALANCE BY
INQUIRY OF THE SECURITIES ADMINISTRATOR.

THIS CERTIFICATE IS SUBORDINATE TO THE SENIOR CERTIFICATES, THE CLASS M
CERTIFICATES AND THE RESIDUAL CERTIFICATES TO THE EXTENT DESCRIBED IN THE
AGREEMENT REFERRED TO HEREIN.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY TO THE DEPOSITOR OR ITS AGENT FOR REGISTRATION OF
TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE
NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT IS MADE TO CEDE &
CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO
ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN
INTEREST HEREIN.

IF ANY BOOK-ENTRY CERTIFICATE (OR ANY INTEREST THEREIN) IS ACQUIRED OR HELD IN
VIOLATION OF THE CERTIFICATE TRANSFER RESTRICTIONS IN THE AGREEMENT, THEN THE
LAST PRECEDING TRANSFEREE THAT IS IN COMPLIANCE WITH SUCH PROVISIONS SHALL BE
RESTORED, TO THE EXTENT PERMITTED BY LAW, TO ALL RIGHTS AND OBLIGATIONS AS
CERTIFICATE OWNER THEREOF RETROACTIVE TO THE DATE OF SUCH TRANSFER OF SUCH
CERTIFICATE. NEITHER THE TRUSTEE NOR THE SECURITIES ADMINISTRATOR SHALL BE UNDER
ANY LIABILITY TO


                                       12

<PAGE>

ANY PERSON FOR MAKING ANY PAYMENTS DUE ON SUCH CERTIFICATE TO SUCH PRECEDING
TRANSFEREE.

ANY PURPORTED CERTIFICATE OWNER WHOSE ACQUISITION OR HOLDING OF ANY BOOK-ENTRY
CERTIFICATE (OR INTEREST THEREIN) WAS EFFECTED IN VIOLATION OF THE CERTIFICATE
TRANSFER RESTRICTIONS IN THE AGREEMENT SHALL INDEMNIFY AND HOLD HARMLESS THE
DEPOSITOR, THE TRUSTEE, THE SECURITIES ADMINISTRATOR, THE MASTER SERVICER AND
THE TRUST FUND FROM AND AGAINST ANY AND ALL LIABILITIES, CLAIMS, COSTS OR
EXPENSES INCURRED BY SUCH PARTIES AS A RESULT OF SUCH ACQUISITION OR HOLDING.

NO TRANSFER OF THIS CERTIFICATE SHALL BE REGISTERED UNLESS THE PROSPECTIVE
TRANSFEREE PROVIDES THE SECURITIES ADMINISTRATOR WITH (A) A REPRESENTATION THAT
SUCH TRANSFEREE IS NOT AN EMPLOYEE BENEFIT PLAN OR OTHER ARRANGEMENT SUBJECT TO
TITLE I OF THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED
("ERISA"), A PLAN SUBJECT TO SECTION 4975 OF THE INTERNAL REVENUE CODE OF 1986,
AS AMENDED (THE "CODE") OR A PLAN SUBJECT TO ANY PROVISION UNDER ANY FEDERAL,
STATE, LOCAL, NON-U.S. OR OTHER LAWS OR REGULATIONS THAT ARE SUBSTANTIVELY
SIMILAR TO THE FOREGOING PROVISIONS OF ERISA OR THE CODE ("SIMILAR LAW")
(COLLECTIVELY, A "PLAN"), AND IS NOT DIRECTLY OR INDIRECTLY ACQUIRING THIS
CERTIFICATE FOR, ON BEHALF OF, OR WITH ANY ASSETS OF ANY SUCH PLAN, (B) IF THIS
CERTIFICATE HAS BEEN THE SUBJECT OF AN ERISA-QUALIFYING UNDERWRITING, A
REPRESENTATION THAT SUCH TRANSFEREE IS AN INSURANCE COMPANY THAT IS ACQUIRING
THIS CERTIFICATE WITH ASSETS OF AN "INSURANCE COMPANY GENERAL ACCOUNT" AS
DEFINED IN SECTION V(E) OF PROHIBITED TRANSACTION CLASS EXEMPTION ("PTCE") 95-60
AND THE ACQUISITION AND HOLDING OF THIS CERTIFICATE ARE COVERED AND EXEMPT UNDER
SECTIONS I AND III OF PTCE 95-60 OR (C) SOLELY IN THE CASE OF A DEFINITIVE
CERTIFICATE, AN OPINION OF COUNSEL SATISFACTORY TO THE SECURITIES ADMINISTRATOR,
AND UPON WHICH THE SECURITIES ADMINISTRATOR SHALL BE ENTITLED TO RELY, TO THE
EFFECT THAT THE ACQUISITION AND HOLDING OF THIS CERTIFICATE BY THE PROSPECTIVE
TRANSFEREE WILL NOT CONSTITUTE OR RESULT IN A NONEXEMPT PROHIBITED TRANSACTION
UNDER ERISA OR THE CODE, OR A VIOLATION OF SIMILAR LAW, AND WILL NOT SUBJECT THE
TRUSTEE, THE SECURITIES ADMINISTRATOR, THE CERTIFICATE REGISTRAR, THE MASTER
SERVICER, ANY SERVICER OR THE DEPOSITOR TO ANY OBLIGATION IN ADDITION TO THOSE
UNDERTAKEN BY SUCH ENTITIES IN THE AGREEMENT, WHICH OPINION OF COUNSEL SHALL NOT
BE AN EXPENSE OF THE TRUSTEE, THE SECURITIES ADMINISTRATOR, THE CERTIFICATE
REGISTRAR, THE MASTER SERVICER, ANY SERVICER OR THE DEPOSITOR. IF THE
CERTIFICATE IS NOT A DEFINITIVE CERTIFICATE,


                                       13

<PAGE>

THE TRANSFEREE IS DEEMED TO HAVE MADE THE REPRESENTATION IN (A) OR (B) ABOVE.

THIS CERTIFICATE HAS NOT BEEN AND WILL NOT BE REGISTERED UNDER THE SECURITIES
ACT OF 1933, AS AMENDED (THE "1933 ACT"), OR THE SECURITIES LAWS OF ANY STATE
AND MAY NOT BE RESOLD OR TRANSFERRED WITHIN THE UNITED STATES (AS DEFINED IN
RULES 901 THROUGH 905 OF THE 1933 ACT ("REGULATION S")) OR TO, OR FOR THE
ACCOUNT OR BENEFIT OF, A U.S. PERSON (AS DEFINED IN REGULATION S), UNLESS IT IS
REGISTERED PURSUANT TO SUCH ACT AND LAWS OR IS SOLD OR TRANSFERRED IN
TRANSACTIONS THAT ARE EXEMPT FROM REGISTRATION UNDER SUCH ACT AND UNDER
APPLICABLE STATE LAW AND IS TRANSFERRED IN ACCORDANCE WITH THE CERTIFICATE
TRANSFER RESTRICTIONS IN THE AGREEMENT.


                                       14

<PAGE>

<TABLE>
<S>                                     <C>
MLMBS Series 2007-1, Class B-[_]        Aggregate  Certificate  Principal
(REGULATION S)                          Balance of Class B-[_] Certificates as
                                        of the Issue Date: $[__________]

Pass Through Rate: Variable(2)          Initial Class Certificate Principal
                                        Balance of this Class B-[_] Certificate
                                        as of the Issue Date: $[__________]

Date of Agreement and Cut-off Date:     Master Servicer and Securities
March 1, 2007                           Administrator: Wells Fargo Bank, N.A.

First Distribution Date: [__________]   Trustee: HSBC Bank USA, National
                                        Association

No. 07-1-B-[_]-Reg S-[_]                Issue Date: [__________]

                                        CUSIP: [__________]
</TABLE>

     DISTRIBUTIONS IN REDUCTION OF THE CERTIFICATE PRINCIPAL BALANCE OF THIS
     CERTIFICATE MAY BE MADE MONTHLY AS SET FORTH HEREIN. ACCORDINGLY, THE
     OUTSTANDING CERTIFICATE PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS
     THAN THE AMOUNT SHOWN ABOVE AS THE DENOMINATION OF THIS CERTIFICATE.

                        MORTGAGE PASS-THROUGH CERTIFICATE
                               MLMBS SERIES 2007-1

evidencing a beneficial ownership interest in a Trust Fund (the "Trust Fund")
consisting primarily of two pools of conventional, one- to four-family,
adjustable-rate, fully amortizing mortgage loans secured by first liens on
residential property (the "Mortgage Loans") formed and sold by

                     MERRILL LYNCH MORTGAGE INVESTORS, INC.

     THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN MERRILL
     LYNCH MORTGAGE INVESTORS, INC., THE MASTER SERVICER, THE SECURITIES
     ADMINISTRATOR, THE TRUSTEE OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER
     THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE LOANS

----------
(2)  As described in the Agreement referenced herein.


                                       15

<PAGE>

     ARE GUARANTEED BY ANY AGENCY OR INSTRUMENTALITY OF THE UNITED STATES.

          This certifies that CEDE & CO. is the registered owner of a Percentage
Interest (obtained by dividing the denomination of this Certificate by the
aggregate Certificate Principal Balance of the Class B-[_] Certificates as of
the Issue Date) in that certain beneficial ownership interest evidenced by all
the Class B-[_] Certificates in the Trust Fund created pursuant to a Pooling and
Servicing Agreement, dated as specified above (the "Agreement"), among Merrill
Lynch Mortgage Investors, Inc., as depositor (hereinafter called the
"Depositor," which term includes any successor entity under the Agreement),
Wells Fargo Bank, N.A., as master servicer (in such capacity, the "Master
Servicer") and securities administrator (in such capacity, the "Securities
Administrator") and HSBC Bank USA, National Association, as trustee (the
"Trustee"), a summary of certain of the pertinent provisions of which is set
forth hereafter. To the extent not defined herein, the capitalized terms used
herein have the meanings assigned in the Agreement. This Certificate is issued
under and is subject to the terms, provisions and conditions of the Agreement,
to which Agreement the Holder of this Certificate by virtue of the acceptance
hereof assents and by which such Holder is bound.

          Interest on this Certificate will accrue during the period specified
in the Agreement on the Certificate Principal Balance hereof at a per annum rate
equal to the variable Pass-Through Rate described in the Agreement.

          Pursuant to the terms of the Agreement, distributions will be made on
the 25th day of each month or, if such 25th day is not a Business Day, the
Business Day immediately following (each, a "Distribution Date"), commencing on
the First Distribution Date specified above, to the Person in whose name this
Certificate is registered on the Record Date, in an amount equal to the product
of the Percentage Interest evidenced by this Certificate and the amount required
to be distributed to the Holders of Class B-[_] Certificates on such
Distribution Date pursuant to the Agreement.

          All distributions to the Holder of this Certificate under the
Agreement will be made or caused to be made by the Securities Administrator by
wire transfer in immediately available funds to the account of the Person
entitled thereto if such Person shall have so notified the Securities
Administrator in writing at least five Business Days prior to the Record Date
immediately prior to such Distribution Date and is the registered owner of Class
B-[_] Certificates, or otherwise by check mailed by first class mail to the
address of the Person entitled thereto, as such name and address shall appear on
the Certificate Register. Notwithstanding the above, the final distribution on
this Certificate will be made after due notice by the Securities Administrator
of the pendency of such distribution and only upon the presentation and
surrender of this Certificate at the office or agency appointed by the
Securities Administrator for that purpose as provided in the Agreement.

          If any Book-Entry Certificate (or any interest therein) is acquired or
held in violation of the Certificate transfer restrictions in the Agreement,
then the last preceding Transferee that is in compliance with such provisions
shall be restored, to the extent permitted by law, to all rights and obligations
as Certificate Owner thereof retroactive to the date of such


                                       16

<PAGE>

Transfer of such Certificate. Neither the Trustee nor the Securities
Administrator shall be under any liability to any Person for making any payments
due on such Certificate to such preceding Transferee.

          Any purported Certificate Owner whose acquisition or holding of any
Book-Entry Certificate (or interest therein) was effected in violation of the
Certificate transfer restrictions in the Agreement shall indemnify and hold
harmless the Depositor, the Trustee, the Securities Administrator, the Master
Servicer and the Trust Fund from and against any and all liabilities, claims,
costs or expenses incurred by such parties as a result of such acquisition or
holding.

          This Certificate is one of a duly authorized issue of Certificates
designated as Mortgage Pass-Through Certificates of the Series specified on the
face hereof (herein called the "Certificates") and representing a Percentage
Interest in the Class of Certificates specified on the face hereof equal to the
denomination specified on the face hereof divided by the aggregate Certificate
Principal Balance of the Class of Certificates specified on the face hereof.

          The Certificates are limited in right of payment to certain
collections and recoveries respecting the Mortgage Loans, all as more
specifically set forth herein and in the Agreement. As provided in the
Agreement, withdrawals from the Master Servicer Collection Account and the
Distribution Account may be made from time to time for purposes other than
distributions to Holders of the Certificates, such purposes including
reimbursement of advances made, or certain expenses incurred, with respect to
the Mortgage Loans.

          The Agreement permits, with certain exceptions and conditions provided
therein, the amendment thereof and the modification of the rights and
obligations of the Depositor, the Securities Administrator, the Master Servicer
and the Trustee and the rights of the Holders of the Certificates under the
Agreement at any time by the Depositor, the Securities Administrator, the Master
Servicer and the Trustee, with the consent of the Holders of Certificates
evidencing Percentage Interests aggregating not less than 51% of the Trust Fund
or of the applicable Class or Classes, if such amendment affects only such Class
or Classes, for the purpose of adding any provisions to or changing in any
manner or eliminating any of the provisions of this Agreement or of modifying in
any manner the rights of the Certificateholders. Any such consent by the Holder
of this Certificate shall be conclusive and binding on such Holder and upon all
future Holders of this Certificate and of any Certificate issued upon the
transfer hereof or in exchange herefor or in lieu hereof whether or not notation
of such consent is made upon this Certificate. The Agreement also permits the
amendment thereof, in certain limited circumstances, without the consent of the
Holders of any of the Certificates.

          As provided in the Agreement and subject to certain limitations set
forth therein, the transfer of this Certificate is registrable in the
Certificate Register upon surrender of this Certificate for registration of
transfer at the offices or agencies appointed by the Securities Administrator as
provided in the Agreement, duly endorsed by, or accompanied by an assignment in
the form below or other written instrument of transfer in form satisfactory to
the Securities Administrator and the Certificate Registrar duly executed by, the
Holder hereof or such Holder's attorney duly authorized in writing, and
thereupon one or more new Certificates of


                                       17

<PAGE>

the same Class in authorized denominations evidencing the same aggregate
Percentage Interest will be issued to the designated transferee or transferees.

          The Certificates are issuable in fully registered form only without
coupons in Classes and denominations representing Percentage Interests specified
in the Agreement. As provided in the Agreement and subject to certain
limitations set forth therein, Certificates are exchangeable for new
Certificates of the same Class in authorized denominations evidencing the same
aggregate Percentage Interest, as requested by the Holder surrendering the same.

          No transfer of this Certificate shall be made unless the transfer is
made pursuant to an effective registration statement under the Securities Act of
1933, as amended (the "1933 Act"), and any applicable state securities laws or
is exempt from the registration requirements under the 1933 Act and such state
securities laws. In the event that a transfer is to be made in reliance upon an
exemption from the 1933 Act and such laws, the Certificateholder desiring to
effect such transfer and such Certificateholder's prospective transferee shall
each certify to the Securities Administrator in writing the facts surrounding
the transfer in a Transferor Representation Letter as described in the Agreement
and (i) deliver to the Securities Administrator an Investor Representation
Letter or Rule 144A Letter as described in the Agreement or (ii) have delivered
to the Securities Administrator an Opinion of Counsel that such transfer may be
made pursuant to an exemption from the Securities Act, which Opinion of Counsel
shall not be an expense of the Depositor or the Securities Administrator. Any
Certificateholder desiring to effect a transfer of this Certificate shall
indemnify the Securities Administrator and the Depositor against any liability
that may result if the transfer is not so exempt or is not made in accordance
with such federal and state laws.

          No service charge will be made for any such registration of transfer
or exchange of Certificates, but the Certificate Registrar may require payment
of a sum sufficient to cover any tax or other governmental charge that may be
imposed in connection with any transfer or exchange of Certificates.

          The Depositor, the Securities Administrator, the Master Servicer, the
Trustee and the Certificate Registrar and any agent of the Depositor, the
Securities Administrator, the Master Servicer, the Trustee or the Certificate
Registrar may treat the Person in whose name this Certificate is registered as
the owner hereof for all purposes, and none of the Depositor, the Securities
Administrator, the Master Servicer, the Trustee, the Certificate Registrar nor
any such agent shall be affected by notice to the contrary.

          This certificate shall be governed by and construed in accordance with
the laws of the state of New York.

          The obligations created by the Agreement and the Trust Fund created
thereby shall terminate upon payment (or provision for payment) to the Holders
of the Certificates of all amounts held by the Securities Administrator and
required to be paid to them pursuant to the Agreement following the earlier of
(i) the Distribution Date on which the Certificate Principal Balance of each
Class of Certificates has been reduced to zero, (ii) the final payment (or any
advance with respect thereto) on or other liquidation of the last Mortgage Loan
remaining in the


                                       18

<PAGE>

Trust Fund and (iii) the Optional Termination of the trust fund according to the
procedures described in the Agreement.

          The recitals contained herein shall be taken as statements of the
Depositor and the Securities Administrator assumes no responsibility for their
correctness.

          Unless the certificate of authentication hereon has been executed by
the Certificate Registrar, by manual signature, this Certificate shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


                                       19

<PAGE>

     IN WITNESS WHEREOF, the Securities Administrator has caused this
Certificate to be duly executed.

                                        WELLS FARGO BANK, N.A.,
                                        as Securities Administrator


                                        By:
                                            ------------------------------------
                                            AUTHORIZED SIGNATORY

                                        Dated: [          ]
                                                ----------

              SECURITIES ADMINISTRATOR'S CERTIFICATE AUTHENTICATION

This is one of the Certificates referred to in the within-mentioned Agreement.

                                        WELLS FARGO BANK, N.A.,
                                        as Authenticating Agent


                                        By:
                                            ------------------------------------
                                            AUTHORIZED SIGNATORY

                                        Dated: [          ]
                                                ----------

                                       20

<PAGE>

                                  ABBREVIATIONS

     The following abbreviations, when used in the inscription on the face of
this instrument, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
<S>         <C>                            <C>                   <C>
TEN COM -   as tenants in common           UNIF GIFT MIN ACT -          CUSTODIAN

TEN ENT -   as tenants by the entireties                             (Cust) (Minor)
                                                                 under Uniform Gifts to
                                                                       Minors Act

JT TEN -    as joint tenants with right                              ______________
            of survivorship and not as                                   (State)
            tenants in common
</TABLE>

     Additional abbreviations may also be used though not in the above list.

                                   ASSIGNMENT

     FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
transfer(s) unto _______________________________________________________________

_____________________________________________________________________________.
(Please print or typewrite name, address including postal zip code, and Taxpayer
Identification Number of assignee)

the Percentage Interest evidenced by the Mortgage Pass-Through Certificate and
hereby authorize(s) the registration of transfer of such interest to assignee on
the Certificate Register of the Trust Fund.

     I (we) further direct the Certificate Registrar to issue a new Certificate
of a like Percentage Interest and Class to the above named assignee and deliver
such Certificate to the following address:

________________________________________________________________________________

_____________________________________________________________________________.

Dated:
      ---------

                                        ----------------------------------------
                                        Signature by or on behalf of assignor


                                        ----------------------------------------
                                        Signature Guaranteed


                                       21

<PAGE>

                            DISTRIBUTION INSTRUCTIONS
     The assignee should include the following for purposes of distribution:

     Distributions shall be made, by wire transfer or otherwise, in immediately
available funds

to __________________________________________________________________________,

for the account of __________________________________________________________,

account number ___________, or, if mailed by check, to ______________________,

Applicable statements should be mailed to ___________________________________,

____________________________________________________________________________.

This information is provided by ____________________________________________,

the assignee named above, or _______________________________________________,
as its agent.


                                       22
<PAGE>

                                   EXHIBIT A-3

                          FORM OF CLASS A-R CERTIFICATE

SOLELY FOR FEDERAL INCOME TAX PURPOSES, THIS CERTIFICATE REPRESENTS ONE OR MORE
"RESIDUAL INTERESTS" IN A "REAL ESTATE MORTGAGE INVESTMENT CONDUIT", AS THOSE
TERMS ARE DEFINED, RESPECTIVELY, IN SECTIONS 860G AND 860D OF THE INTERNAL
REVENUE CODE OF 1986, AS AMENDED.

THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN THE
DEPOSITOR, THE TRUSTEE, THE MASTER SERVICER OR THE SECURITIES ADMINISTRATOR
REFERRED TO BELOW OR ANY OF THEIR AFFILIATES. NONE OF THIS CERTIFICATE, THE
REMIC RESIDUAL INTERESTS REPRESENTED HEREBY OR THE UNDERLYING MORTGAGE LOANS ARE
GUARANTEED OR INSURED BY THE DEPOSITOR, THE TRUSTEE, THE MASTER SERVICER, THE
SECURITIES ADMINISTRATOR OR BY ANY OF THEIR AFFILIATES OR BY ANY GOVERNMENTAL
AGENCY OR INSTRUMENTALITY.

FOLLOWING THE INITIAL ISSUANCE OF THE CERTIFICATES, THE PRINCIPAL BALANCE OF
THIS CERTIFICATE MAY BE DIFFERENT FROM THE ORIGINAL DENOMINATION SHOWN BELOW.
ANYONE ACQUIRING THIS CERTIFICATE MAY ASCERTAIN ITS CURRENT PRINCIPAL BALANCE BY
INQUIRY OF THE SECURITIES ADMINISTRATOR.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY TO THE DEPOSITOR OR ITS AGENT FOR REGISTRATION OF
TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE
NAME OF MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED OR SUCH OTHER NAME AS
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND
ANY PAYMENT IS MADE TO MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED, ANY
TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON
IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, MERRILL LYNCH, PIERCE, FENNER &
SMITH INCORPORATED, HAS AN INTEREST HEREIN.

IF ANY BOOK-ENTRY CERTIFICATE (OR ANY INTEREST THEREIN) IS ACQUIRED OR HELD IN
VIOLATION OF THE CERTIFICATE TRANSFER RESTRICTIONS IN THE AGREEMENT, THEN THE
LAST PRECEDING TRANSFEREE THAT IS IN COMPLIANCE WITH SUCH PROVISIONS SHALL BE
RESTORED, TO THE EXTENT PERMITTED BY LAW, TO ALL RIGHTS AND OBLIGATIONS AS
CERTIFICATE OWNER THEREOF RETROACTIVE TO THE DATE OF SUCH TRANSFER OF SUCH
CERTIFICATE. NEITHER THE TRUSTEE NOR THE SECURITIES ADMINISTRATOR SHALL BE UNDER
ANY LIABILITY TO ANY PERSON FOR MAKING ANY PAYMENTS DUE ON SUCH CERTIFICATE TO
SUCH PRECEDING TRANSFEREE.


                                        2

<PAGE>

ANY PURPORTED CERTIFICATE OWNER WHOSE ACQUISITION OR HOLDING OF ANY BOOK-ENTRY
CERTIFICATE (OR INTEREST THEREIN) WAS EFFECTED IN VIOLATION OF THE CERTIFICATE
TRANSFER RESTRICTIONS IN THE AGREEMENT SHALL INDEMNIFY AND HOLD HARMLESS THE
DEPOSITOR, THE TRUSTEE, THE SECURITIES ADMINISTRATOR, THE MASTER SERVICER AND
THE TRUST FUND FROM AND AGAINST ANY AND ALL LIABILITIES, CLAIMS, COSTS OR
EXPENSES INCURRED BY SUCH PARTIES AS A RESULT OF SUCH ACQUISITION OR HOLDING.

NO TRANSFER OF THIS CERTIFICATE SHALL BE REGISTERED UNLESS THE PROSPECTIVE
TRANSFEREE PROVIDES THE SECURITIES ADMINISTRATOR AND THE DEPOSITOR WITH A
REPRESENTATION THAT SUCH TRANSFEREE IS NOT AN EMPLOYEE BENEFIT PLAN SUBJECT TO
TITLE I OF THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED
("ERISA"), A PLAN SUBJECT TO SECTION 4975 OF THE CODE OR A PLAN SUBJECT TO ANY
FEDERAL, STATE, LOCAL, NON-U.S. OR OTHER LAWS OR REGULATIONS THAT ARE
SUBSTANTIVELY SIMILAR TO THE FOREGOING PROVISIONS OF ERISA OR THE CODE, AND IS
NOT DIRECTLY OR INDIRECTLY ACQUIRING THIS CERTIFICATE FOR, ON BEHALF OF, OR WITH
ANY ASSETS OF ANY SUCH PLAN. ANY RESALE, TRANSFER OR OTHER DISPOSITION OF THIS
CERTIFICATE MAY BE MADE ONLY IN ACCORDANCE WITH THE CERTIFICATE TRANSFER
RESTRICTIONS IN THE AGREEMENT REFERRED TO HEREIN.


                                        3

<PAGE>

<TABLE>
<S>                                     <C>
MLMBS Series 2007-1, Class A-R          Aggregate Certificate Principal Balance
                                        of the Class A-R Certificates as of the
                                        Issue Date: $[__________]

Pass-Through Rate: Variable(1)          Initial Certificate Principal Balance
                                        of this Class A-R Certificate as of the
                                        Issue Date: $[__________]

Date of Agreement and Cut-off Date:     Master Servicer and Securities
March 1, 2007                           Administrator: Wells Fargo Bank, N.A.

First Distribution Date: [__________]   Trustee: HSBC Bank USA, National
                                        Association

No. 07-1-A-R-[__________]               Issue Date: [__________]

                                        CUSIP: [__________]
</TABLE>

     DISTRIBUTIONS IN REDUCTION OF THE CERTIFICATE PRINCIPAL BALANCE OF THIS
     CERTIFICATE MAY BE MADE MONTHLY AS SET FORTH HEREIN. ACCORDINGLY, THE
     OUTSTANDING CERTIFICATE PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS
     THAN THE AMOUNT SHOWN ABOVE AS THE DENOMINATION OF THIS CERTIFICATE.

                        MORTGAGE PASS-THROUGH CERTIFICATE
                               MLMBS SERIES 2007-1

evidencing a beneficial ownership interest in a Trust Fund (the "Trust Fund")
consisting primarily of two pools of conventional, one- to four-family,
adjustable-rate, fully amortizing mortgage loans secured by first liens on
residential property (the "Mortgage Loans") formed and sold by

                     MERRILL LYNCH MORTGAGE INVESTORS, INC.

     THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN MERRILL
     LYNCH MORTGAGE INVESTORS, INC., THE MASTER SERVICER, THE SECURITIES
     ADMINISTRATOR, THE TRUSTEE OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER
     THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE LOANS ARE GUARANTEED BY ANY
     AGENCY OR INSTRUMENTALITY OF THE UNITED STATES.

          This certifies that MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
is the registered owner of a Percentage Interest obtained by dividing the

----------
(1)  As described in the Agreement referenced herein.


                                        4

<PAGE>

denomination of this Certificate by the aggregate Certificate Principal Balance
of the Class A-R Certificates as of the Issue Date in that certain beneficial
ownership interest evidenced by all the Class A-R Certificates in the Trust Fund
created pursuant to a Pooling and Servicing Agreement, dated as specified above
(the "Agreement"), among Merrill Lynch Mortgage Investors, Inc., as depositor
(hereinafter called the "Depositor," which term includes any successor entity
under the Agreement), Wells Fargo Bank, N.A., as master servicer (in such
capacity, the "Master Servicer") and securities administrator (in such capacity,
the "Securities Administrator") and HSBC Bank USA, National Association, as
trustee (the "Trustee"), a summary of certain of the pertinent provisions of
which is set forth hereafter. To the extent not defined herein, the capitalized
terms used herein have the meanings assigned in the Agreement. This Certificate
is issued under and is subject to the terms, provisions and conditions of the
Agreement, to which Agreement the Holder of this Certificate by virtue of the
acceptance hereof assents and by which such Holder is bound.

          Interest on this Certificate will accrue during the period specified
in the Agreement on the Certificate Principal Balance hereof at a per annum rate
equal to the variable Pass-Through Rate described in the Agreement.

          Pursuant to the terms of the Agreement, distributions will be made on
the 25th day of each month or, if such 25th day is not a Business Day, the
Business Day immediately following (each, a "Distribution Date"), commencing on
the First Distribution Date specified above, to the Person in whose name this
Certificate is registered on the Record Date, in an amount equal to the product
of the Percentage Interest evidenced by this Certificate and the amount required
to be distributed to the Holders of Class A-R Certificates on such Distribution
Date pursuant to the Agreement.

          All distributions to the Holder of this Certificate under the
Agreement will be made or caused to be made by the Securities Administrator by
wire transfer in immediately available funds to the account of the Person
entitled thereto if such Person shall have so notified the Securities
Administrator in writing at least five Business Days prior to the Record Date
immediately prior to such Distribution Date and is the registered owner of Class
A-R Certificates, or otherwise by check mailed by first class mail to the
address of the Person entitled thereto, as such name and address shall appear on
the Certificate Register. Notwithstanding the above, the final distribution on
this Certificate will be made after due notice by the Securities Administrator
of the pendency of such distribution and only upon the presentation and
surrender of this Certificate at the office or agency appointed by the
Securities Administrator for that purpose as provided in the Agreement.

          If any Book-Entry Certificate (or any interest therein) is acquired or
held in violation of the Certificate transfer restrictions in the Agreement,
then the last preceding Transferee that is in compliance with such provisions
shall be restored, to the extent permitted by law, to all rights and obligations
as Certificate Owner thereof retroactive to the date of such Transfer of such
Certificate. Neither the Trustee nor the Securities Administrator shall be under
any liability to any Person for making any payments due on such Certificate to
such preceding Transferee.

          Any purported Certificate Owner whose acquisition or holding of any
Book-Entry Certificate (or interest therein) was effected in violation of the
Certificate transfer restrictions in


                                        5

<PAGE>

the Agreement shall indemnify and hold harmless the Depositor, the Trustee, the
Securities Administrator, the Master Servicer and the Trust Fund from and
against any and all liabilities, claims, costs or expenses incurred by such
parties as a result of such acquisition or holding.

          This Certificate is one of a duly authorized issue of Certificates
designated as Mortgage Pass-Through Certificates of the Series specified on the
face hereof (herein called the "Certificates") and representing a Percentage
Interest in the Class of Certificates specified on the face hereof equal to the
denomination specified on the face hereof divided by the aggregate Certificate
Principal Balance of the Class of Certificates specified on the face hereof.

          The Certificates are limited in right of payment to certain
collections and recoveries respecting the Mortgage Loans, all as more
specifically set forth herein and in the Agreement. As provided in the
Agreement, withdrawals from the Master Servicer Collection Account and the
Distribution Account may be made from time to time for purposes other than
distributions to Holders of the Certificates, such purposes including
reimbursement of advances made, or certain expenses incurred, with respect to
the Mortgage Loans.

          The Agreement permits, with certain exceptions and conditions provided
therein, the amendment thereof and the modification of the rights and
obligations of the Depositor, the Securities Administrator, the Master Servicer
and the Trustee and the rights of the Holders of the Certificates under the
Agreement at any time by the Depositor, the Securities Administrator, the Master
Servicer and the Trustee, with the consent of the Holders of Certificates
evidencing Percentage Interests aggregating not less than 51% of the Trust Fund
or of the applicable Class or Classes, if such amendment affects only such Class
or Classes, for the purpose of adding any provisions to or changing in any
manner or eliminating any of the provisions of this Agreement or of modifying in
any manner the rights of the Certificateholders. Any such consent by the Holder
of this Certificate shall be conclusive and binding on such Holder and upon all
future Holders of this Certificate and of any Certificate issued upon the
transfer hereof or in exchange herefor or in lieu hereof whether or not notation
of such consent is made upon this Certificate. The Agreement also permits the
amendment thereof, in certain limited circumstances, without the consent of the
Holders of any of the Certificates.

          As provided in the Agreement and subject to certain limitations set
forth therein, the transfer of this Certificate is registrable in the
Certificate Register upon surrender of this Certificate for registration of
transfer at the offices or agencies appointed by the Securities Administrator as
provided in the Agreement, duly endorsed by, or accompanied by an assignment in
the form below or other written instrument of transfer in form satisfactory to
the Securities Administrator and the Certificate Registrar duly executed by, the
Holder hereof or such Holder's attorney duly authorized in writing, and
thereupon one or more new Certificates of the same Class in authorized
denominations evidencing the same aggregate Percentage Interest will be issued
to the designated transferee or transferees.

          The Certificates are issuable in fully registered form only without
coupons in Classes and denominations representing Percentage Interests specified
in the Agreement. As provided in the Agreement and subject to certain
limitations set forth therein, Certificates are exchangeable for new
Certificates of the same Class in authorized denominations evidencing the same
aggregate Percentage Interest, as requested by the Holder surrendering the same.


                                        6

<PAGE>

          No service charge will be made for any such registration of transfer
or exchange of Certificates, but the Certificate Registrar may require payment
of a sum sufficient to cover any tax or other governmental charge that may be
imposed in connection with any transfer or exchange of Certificates.

          The Depositor, the Securities Administrator, the Master Servicer, the
Trustee and the Certificate Registrar and any agent of the Depositor, the
Securities Administrator, the Master Servicer, the Trustee or the Certificate
Registrar may treat the Person in whose name this Certificate is registered as
the owner hereof for all purposes, and none of the Depositor, the Securities
Administrator, the Master Servicer, the Trustee, the Certificate Registrar nor
any such agent shall be affected by notice to the contrary.

          This certificate shall be governed by and construed in accordance with
the laws of the state of New York.

          The obligations created by the Agreement and the Trust Fund created
thereby shall terminate upon payment (or provision for payment) to the Holders
of the Certificates of all amounts held by the Securities Administrator and
required to be paid to them pursuant to the Agreement following the earlier of
(i) the Distribution Date on which the Certificate Principal Balance of each
Class of Certificates has been reduced to zero, (ii) the final payment (or any
advance with respect thereto) on or other liquidation of the last Mortgage Loan
remaining in the Trust Fund and (iii) the Optional Termination of the trust fund
according to the procedures described in the Agreement.

          The recitals contained herein shall be taken as statements of the
Depositor and the Securities Administrator assumes no responsibility for their
correctness.

          Unless the certificate of authentication hereon has been executed by
the Certificate Registrar, by manual signature, this Certificate shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


                                        7

<PAGE>

     IN WITNESS WHEREOF, the Securities Administrator has caused this
Certificate to be duly executed.

                                        WELLS FARGO BANK, N.A.,
                                        as Securities Administrator


                                        By:
                                            ------------------------------------
                                            AUTHORIZED SIGNATORY

                                        Dated: [          ]
                                                ----------

              SECURITIES ADMINISTRATOR'S CERTIFICATE AUTHENTICATION

This is one of the Certificates referred to in the within-mentioned Agreement.

                                        WELLS FARGO BANK, N.A.,
                                        as Authenticating Agent


                                        By:
                                            ------------------------------------
                                            AUTHORIZED SIGNATORY

                                        Dated: [          ]
                                                ----------


                                        8

<PAGE>

                                  ABBREVIATIONS

     The following abbreviations, when used in the inscription on the face of
this instrument, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
<S>         <C>                            <C>                   <C>
TEN COM -   as tenants in common           UNIF GIFT MIN ACT -          CUSTODIAN

TEN ENT -   as tenants by the entireties                             (Cust) (Minor)
                                                                 under Uniform Gifts to
                                                                       Minors Act

JT TEN -    as joint tenants with right                              ______________
            of survivorship and not as                                   (State)
            tenants in common
</TABLE>

     Additional abbreviations may also be used though not in the above list.

                                   ASSIGNMENT

     FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
transfer(s) unto _____________________________________________________________

_____________________________________________________________________________.
(Please print or typewrite name, address including postal zip code, and Taxpayer
Identification Number of assignee)

the Percentage Interest evidenced by the Mortgage Pass-Through Certificate and
hereby authorize(s) the registration of transfer of such interest to assignee on
the Certificate Register of the Trust Fund.

     I (we) further direct the Certificate Registrar to issue a new Certificate
of a like Percentage Interest and Class to the above named assignee and deliver
such Certificate to the following address:

________________________________________________________________________________

_____________________________________________________________________________.

Dated:
       ----------------


                                        ----------------------------------------
                                        Signature by or on behalf of assignor


                                        ----------------------------------------
                                        Signature Guaranteed


                                        9

<PAGE>


                            DISTRIBUTION INSTRUCTIONS

     The assignee should include the following for purposes of distribution:

     Distributions shall be made, by wire transfer or otherwise, in immediately
available funds

to __________________________________________________________________________,

for the account of __________________________________________________________,

account number __________, or, if mailed by check, to _______________________,

Applicable statements should be mailed to ___________________________________,

_____________________________________________________________________________.

This information is provided by _____________________________________________,

the assignee named above, or ________________________________________________,
as its agent.


                                       10
<PAGE>

                                   EXHIBIT A-4

                           FORM OF CLASS P CERTIFICATE

THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN THE
DEPOSITOR, THE TRUSTEE, THE MASTER SERVICER OR THE SECURITIES ADMINISTRATOR OR
ANY OF THEIR AFFILIATES. NEITHER THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE
LOANS ARE GUARANTEED OR INSURED BY THE DEPOSITOR, THE TRUSTEE, THE MASTER
SERVICER, THE SECURITIES ADMINISTRATOR OR BY ANY OF THEIR AFFILIATES OR BY ANY
GOVERNMENTAL AGENCY OR INSTRUMENTALITY.

THIS CLASS P CERTIFICATE HAS NOT BEEN AND WILL NOT BE REGISTERED UNDER THE
SECURITIES ACT OF 1933, AS AMENDED, OR THE SECURITIES LAWS OF ANY STATE AND MAY
NOT BE RESOLD OR TRANSFERRED UNLESS IT IS SOLD OR TRANSFERRED IN TRANSACTIONS
WHICH ARE EXEMPT FROM REGISTRATION UNDER SUCH ACT OR UNDER APPLICABLE STATE LAW
AND IS TRANSFERRED IN ACCORDANCE WITH THE CERTIFICATE REGISTRATION PROVISIONS IN
THE AGREEMENT REFERRED TO HEREIN.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY TO THE DEPOSITOR OR ITS AGENT FOR REGISTRATION OF
TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE
NAME OF MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED OR SUCH OTHER NAME AS
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND
ANY PAYMENT IS MADE TO MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED, ANY
TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON
IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, MERRILL LYNCH, PIERCE, FENNER &
SMITH INCORPORATED, HAS AN INTEREST HEREIN.

NO TRANSFER OF THIS CERTIFICATE SHALL BE REGISTERED UNLESS THE PROSPECTIVE
TRANSFEREE PROVIDES THE TRUSTEE, THE SECURITIES ADMINISTRATOR AND THE DEPOSITOR
WITH (A) A REPRESENTATION THAT SUCH TRANSFEREE IS NOT AN EMPLOYEE BENEFIT PLAN
SUBJECT TO TITLE I OF THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS
AMENDED ("ERISA"), A PLAN SUBJECT TO SECTION 4975 OF THE CODE OR A PLAN SUBJECT
TO ANY STATE, LOCAL, FEDERAL, NON-U.S. OR OTHER LAW SUBSTANTIVELY SIMILAR TO THE
FOREGOING PROVISIONS OF ERISA OR THE CODE ("SIMILAR LAW"), AND IS NOT DIRECTLY
OR INDIRECTLY ACQUIRING THIS CERTIFICATE FOR, ON BEHALF OF, OR WITH ANY ASSETS
OF ANY SUCH PLAN, (B) IF THE CERTIFICATE HAS BEEN THE SUBJECT OF AN
ERISA-QUALIFYING UNDERWRITING, A REPRESENTATION THAT SUCH TRANSFEREE IS AN
INSURANCE COMPANY THAT IS ACQUIRING THE CERTIFICATE WITH ASSETS OF AN "INSURANCE
COMPANY GENERAL ACCOUNT" AS DEFINED IN SECTION V(E) OF PROHIBITED TRANSACTION
CLASS EXEMPTION ("PTCE") 95-60 AND THE ACQUISITION AND HOLDING OF THE
CERTIFICATE ARE COVERED AND EXEMPT UNDER SECTIONS I AND III


                                       1

<PAGE>

OF PTCE 95-60 OR (C) SOLELY IN THE CASE OF A DEFINITIVE CERTIFICATE, AN OPINION
OF COUNSEL SATISFACTORY TO THE SECURITIES ADMINISTRATOR, AND UPON WHICH THE
SECURITIES ADMINISTRATOR SHALL BE ENTITLED TO RELY, TO THE EFFECT THAT THE
ACQUISITION AND HOLDING OF SUCH CERTIFICATE BY THE PROSPECTIVE TRANSFEREE WILL
NOT CONSTITUTE OR RESULT IN A NONEXEMPT PROHIBITED TRANSACTION UNDER ERISA OR
THE CODE OR A VIOLATION OF SIMILAR LAW AND WILL NOT SUBJECT THE TRUSTEE, THE
MASTER SERVICER, THE SECURITIES ADMINISTRATOR OR THE DEPOSITOR TO ANY OBLIGATION
IN ADDITION TO THOSE UNDERTAKEN BY SUCH ENTITIES IN THE AGREEMENT, WHICH OPINION
OF COUNSEL SHALL NOT BE AN EXPENSE OF THE TRUSTEE, THE MASTER SERVICER, THE
SECURITIES ADMINISTRATOR OR THE DEPOSITOR.


                                       2

<PAGE>

                               CLASS P CERTIFICATE

Number: 07-1-P-[_____]             Percentage Interest: 100%

Cut-off Date: March 1, 2007

First Distribution Date: [_____]   CUSIP: [_____]


                                       3

<PAGE>

                        MORTGAGE PASS-THROUGH CERTIFICATE
                               MLMBS SERIES 2007-1

evidencing a beneficial ownership interest in a Trust Fund (the "Trust Fund")
consisting primarily of two pools of conventional, one to four family,
fixed-rate, fully-amortizing mortgage loans secured by first liens on
residential property (the "Mortgage Loans") formed and sold by

                     MERRILL LYNCH MORTGAGE INVESTORS, INC.

     THIS CERTIFICATE DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN MERRILL
     LYNCH MORTGAGE INVESTORS, INC., THE MASTER SERVICER, THE SECURITIES
     ADMINISTRATOR, THE TRUSTEE OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER
     THIS CERTIFICATE NOR THE UNDERLYING MORTGAGE LOANS ARE GUARANTEED BY ANY
     AGENCY OR INSTRUMENTALITY OF THE UNITED STATES.

          This certifies that MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
as NOMINEE for MERRILL LYNCH FUNDING CORPORATION is the registered owner of a
Percentage Interest obtained by dividing the denomination of this Certificate by
the aggregate Certificate Principal Balance of the Class P Certificates as of
the Issue Date in that certain beneficial ownership interest evidenced by all
the Class P Certificates in the Trust Fund created pursuant to a Pooling and
Servicing Agreement, dated as specified above (the "Agreement"), among Merrill
Lynch Mortgage Investors, Inc., as depositor (hereinafter called the
"Depositor," which term includes any successor entity under the Agreement),
Wells Fargo Bank, N.A., as master servicer (in such capacity, the "Master
Servicer") and securities administrator (in such capacity, the "Securities
Administrator"), and HSBC Bank USA, National Association, as trustee (the
"Trustee"), a summary of certain of the pertinent provisions of which is set
forth hereafter. To the extent not defined herein, the capitalized terms used
herein have the meanings assigned in the Agreement. This Certificate is issued
under and is subject to the terms, provisions and conditions of the Agreement,
to which Agreement the Holder of this Certificate by virtue of the acceptance
hereof assents and by which such Holder is bound.

          Pursuant to the terms of the Agreement, distributions will be made on
the 25th day of each month or, if such 25th day is not a Business Day, the
Business Day immediately following (each, a "Distribution Date"), commencing on
the First Distribution Date specified above, to the Person in whose name this
Certificate is registered on the Record Date, in an amount equal to the product
of the Percentage Interest evidenced by this Certificate and the amount required
to be distributed to the Holders of Class P Certificates on such Distribution
Date pursuant to the Agreement.

          All distributions to the Holder of this Certificate under the
Agreement will be made or caused to be made by the Securities Administrator by
wire transfer in immediately available funds to the account of the Person
entitled thereto if such Person shall have so notified the Securities
Administrator in writing at least five Business Days prior to the Record Date
immediately prior to such Distribution Date and is the registered owner of Class
P Certificates, or otherwise by check mailed by first class mail to the address
of the Person entitled thereto, as such name and address shall appear on the
Certificate Register. Notwithstanding the above, the


                                       4

<PAGE>

final distribution on this Certificate will be made after due notice by the
Securities Administrator of the pendency of such distribution and only upon the
presentation and surrender of this Certificate at the office or agency appointed
by the Securities Administrator for that purpose as provided in the Agreement.

          If any Book-Entry Certificate (or any interest therein) is acquired or
held in violation of the Certificate transfer restrictions in the Agreement,
then the last preceding Transferee that is in compliance with such provisions
shall be restored, to the extent permitted by law, to all rights and obligations
as Certificate Owner thereof retroactive to the date of such Transfer of such
Certificate. Neither the Trustee nor the Securities Administrator shall be under
any liability to any Person for making any payments due on such Certificate to
such preceding Transferee.

          Any purported Certificate Owner whose acquisition or holding of any
Book-Entry Certificate (or interest therein) was effected in violation of the
certificate transfer restrictions in the Agreement shall indemnify and hold
harmless the Depositor, the Trustee, the Securities Administrator, the Master
Servicer and the Trust Fund from and against any and all liabilities, claims,
costs or expenses incurred by such parties as a result of such acquisition or
holding.

          This Certificate is one of a duly authorized issue of Certificates
designated as Mortgage Pass-Through Certificates of the Series specified on the
face hereof (herein called the "Certificates") and representing a Percentage
Interest in the Class of Certificates specified on the face hereof equal to the
denomination specified on the face hereof divided by the aggregate Certificate
Principal Balance of the Class of Certificates specified on the face hereof.

          The Certificates are limited in right of payment to certain
collections and recoveries respecting the Mortgage Loans, all as more
specifically set forth herein and in the Agreement. As provided in the
Agreement, withdrawals from the Master Servicer Collection Account and the
Distribution Account may be made from time to time for purposes other than
distributions to Holders of the Certificates, such purposes including
reimbursement of advances made, or certain expenses incurred, with respect to
the Mortgage Loans.

          The Agreement permits, with certain exceptions and conditions provided
therein, the amendment thereof and the modification of the rights and
obligations of the Depositor, the Securities Administrator, the Master Servicer
and the Trustee and the rights of the Holders of the Certificates under the
Agreement at any time by the Depositor, the Securities Administrator, the Master
Servicer and the Trustee, with the consent of the Holders of Certificates
evidencing Percentage Interests aggregating not less than 51% of the Trust Fund
or of the applicable Class or Classes, if such amendment affects only such Class
or Classes, for the purpose of adding any provisions to or changing in any
manner or eliminating any of the provisions of this Agreement or of modifying in
any manner the rights of the Certificateholders. Any such consent by the Holder
of this Certificate shall be conclusive and binding on such Holder and upon all
future Holders of this Certificate and of any Certificate issued upon the
transfer hereof or in exchange herefor or in lieu hereof whether or not notation
of such consent is made upon this Certificate. The Agreement also permits the
amendment thereof, in certain limited circumstances, without the consent of the
Holders of any of the Certificates.


                                       5

<PAGE>

          As provided in the Agreement and subject to certain limitations set
forth therein, the transfer of this Certificate is registrable in the
Certificate Register upon surrender of this Certificate for registration of
transfer at the offices or agencies appointed by the Securities Administrator as
provided in the Agreement, duly endorsed by, or accompanied by an assignment in
the form below or other written instrument of transfer in form satisfactory to
the Securities Administrator and the Certificate Registrar duly executed by, the
Holder hereof or such Holder's attorney duly authorized in writing, and
thereupon one or more new Certificates of the same Class in authorized
denominations evidencing the same aggregate Percentage Interest will be issued
to the designated transferee or transferees.

          The Certificates are issuable in fully registered form only without
coupons in Classes and denominations representing Percentage Interests specified
in the Agreement. As provided in the Agreement and subject to certain
limitations set forth therein, Certificates are exchangeable for new
Certificates of the same Class in authorized denominations evidencing the same
aggregate Percentage Interest, as requested by the Holder surrendering the same.

          No service charge will be made for any such registration of transfer
or exchange of Certificates, but the Certificate Registrar may require payment
of a sum sufficient to cover any tax or other governmental charge that may be
imposed in connection with any transfer or exchange of Certificates.

          The Depositor, the Securities Administrator, the Master Servicer, the
Trustee and the Certificate Registrar and any agent of the Depositor, the
Securities Administrator, the Master Servicer, the Trustee or the Certificate
Registrar may treat the Person in whose name this Certificate is registered as
the owner hereof for all purposes, and none of the Depositor, the Securities
Administrator, the Master Servicer, the Trustee, the Certificate Registrar nor
any such agent shall be affected by notice to the contrary.

          This certificate shall be governed by and construed in accordance with
the laws of the state of New York.

          The obligations created by the Agreement and the Trust Fund created
thereby shall terminate upon payment (or provision for payment) to the Holders
of the Certificates of all amounts held by the Securities Administrator and
required to be paid to them pursuant to the Agreement following the earlier of
(i) the Distribution Date on which the Certificate Principal Balance of each
Class of Certificates has been reduced to zero, (ii) the final payment (or any
advance with respect thereto) on or other liquidation of the last Mortgage Loan
remaining in the Trust Fund and (iii) the Optional Termination of the trust fund
according to the procedures described in the Agreement.

          The recitals contained herein shall be taken as statements of the
Depositor and the Securities Administrator assumes no responsibility for their
correctness.

          Unless the certificate of authentication hereon has been executed by
the Certificate Registrar, by manual signature, this Certificate shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


                                       6

<PAGE>

IN WITNESS WHEREOF, the Securities Administrator has caused this Certificate to
be duly executed.

                                        WELLS FARGO BANK, N.A.,
                                        as Securities Administrator


                                        By:
                                            ------------------------------------
                                            AUTHORIZED SIGNATORY

                                        Dated: [          ]
                                                ----------

              SECURITIES ADMINISTRATOR'S CERTIFICATE AUTHENTICATION

This is one of the Certificates referred to in the within-mentioned Agreement.

                                        WELLS FARGO BANK, N.A.,
                                        as Authenticating Agent


                                        By:
                                            ------------------------------------
                                            AUTHORIZED SIGNATORY

                                        Dated: [          ]
                                                ----------


                                       7

<PAGE>

                                  ABBREVIATIONS

     The following abbreviations, when used in the inscription on the face of
this instrument, shall be construed as though they were written out in full
according to applicable laws or regulations:

<TABLE>
<S>         <C>                              <C>                    <C>
TEN COM -   as tenants in common             UNIF GIFT MIN ACT -          CUSTODIAN

TEN ENT -   as tenants by the entireties                                (Cust) (Minor)

                                                                    under Uniform Gifts to
                                                                          Minors Act

JT TEN -    as joint tenants with right of                              ______________
            survivorship and not as                                        (State)
            tenants in common
</TABLE>

     Additional abbreviations may also be used though not in the above list.

                                   ASSIGNMENT

     FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and
transfer(s) unto _______________________________________________________________

______________________________________________________________________________.
(Please print or typewrite name, address including postal zip code, and Taxpayer
Identification Number of assignee)

the Percentage Interest evidenced by the Mortgage Pass-Through Certificate and
hereby authorize(s) the registration of transfer of such interest to assignee on
the Certificate Register of the Trust Fund.

     I (we) further direct the Certificate Registrar to issue a new Certificate
of a like Percentage Interest and Class to the above named assignee and deliver
such Certificate to the following address:

________________________________________________________________________________

______________________________________________________________________________ .

Dated:
       -----------------


                                        ----------------------------------------
                                        Signature by or on behalf of assignor


                                        ----------------------------------------
                                        Signature Guaranteed


                                       8

<PAGE>

                            DISTRIBUTION INSTRUCTIONS

     The assignee should include the following for purposes of distribution:

     Distributions shall be made, by wire transfer or otherwise, in immediately
available funds

to ________________________________________________________________________,

for the account of ________________________________________________________,

account number ___________, or, if mailed by check, to ____________________,

Applicable statements should be mailed to _________________________________,

___________________________________________________________________________.

This information is provided by ___________________________________________,

the assignee named above, or ______________________________________________,
as its agent.


                                       9
<PAGE>

                                    EXHIBIT B
                             MORTGAGE LOAN SCHEDULE
                             [Provided Upon Request]


                                       B-1
<PAGE>

                                    EXHIBIT C
                                   [RESERVED]


                                       C-1
<PAGE>

                                    EXHIBIT D

                        REQUEST FOR RELEASE OF DOCUMENTS

To: Wells Fargo Bank, N.A.
    1015 10th Avenue S.E.
    Minneapolis Minnesota 55414
    Attn: ______________________

     Re: Custodial Agreement dated as of March 30, 2007 among HSBC Bank USA,
         National Association, Merrill Lynch Mortgage Investors, Inc. and Wells
         Fargo Bank, N.A.

     In connection with the administration of the Mortgage Loans held by you as
Custodian for the Owner pursuant to the above-captioned Custodial Agreement, we
request the release, and hereby acknowledge receipt, of the Custodian's Mortgage
File for the Mortgage Loan described below, for the reason indicated.

Mortgage Loan Number: ___________________

Mortgagor Name, Address & Zip Code: ____________________

Reason for Requesting Documents (check one): ____________________

_______________ 1. Mortgage Paid in full

_______________ 2. Foreclosure

_______________ 3. Substitution

_______________ 4. Other Liquidation (Repurchases, etc.)

_______________ 5. Nonliquidation       Reason: _______________________


                                        By:
                                            ------------------------------------
                                                  (authorized signer)
                                        Issuer:
                                                --------------------------------
                                        Address:
                                                 -------------------------------

                                                 -------------------------------
                                        Date:
                                              ----------------------------------


                                       D-1

<PAGE>

Custodian

Wells Fargo Bank, N.A.

Please acknowledge the execution of the above request by your signature and date
below:

Please acknowledge the execution of the above request by your signature and date
below:


-------------------------------------   ----------------------------------------
Signature                               Date

Documents returned to Custodian:


-------------------------------------   ----------------------------------------
Custodian                               Date


                                       D-2
<PAGE>

                                   EXHIBIT E-1
                    FORM OF TRANSFEREE'S LETTER AND AFFIDAVIT

                                     [DATE]

Wells Fargo Bank, N.A.
9062 Old Annapolis Road
Columbia, Maryland 21045
Attention: Corporate Trust Services - Merrill Lynch Mortgage Backed Securities
Trust, Series 2007-1

Ladies and Gentlemen:

We propose to purchase Merrill Lynch Mortgage Backed Securities Trust, Series
2007-1 Mortgage Pass-Through Certificates, Class A-R, described in the
Prospectus Supplement, dated March 28, 2007, and the Prospectus, dated March 22,
2007. Capitalized terms used but not defined herein shall have the meanings
assigned to them in the Pooling and Servicing Agreement dated March 1, 2007
relating to this issuance of the Merrill Lynch Mortgage Backed Securities Trust,
Series 2007-1 Mortgage Pass-Through Certificates (the "Pooling and servicing
Agreement").

1. We certify that (a) we are not a disqualified organization and (b) we are not
purchasing such Class A-R Certificate on behalf of a disqualified organization;
for this purpose the term "disqualified organization" means the United States,
any state or political subdivision thereof, any foreign government, any
international organization, any agency or instrumentality of any of the
foregoing (except any entity treated as other than an instrumentality of the
foregoing for purposes of Section 168(h)(2)(D) of the Internal Revenue Code of
1986, as amended (the "Code")), any organization (other than a cooperative
described in Section 521 of the Code) that is exempt from taxation under the
Code (unless such organization is subject to tax on excess inclusions) and any
organization that is described in Section 1381(a)(2)(C) of the Code. We
understand that any breach by us of this certification may cause us to be liable
for an excise tax imposed upon transfers to disqualified organizations.

2. We certify that (a) we have historically paid our debts as they became due,
(b) we intend, and believe that we will be able, to continue to pay our debts as
they become due in the future, (c) we understand that, as beneficial owner of
the Class A-R Certificate, we may incur tax liabilities in excess of any cash
flows generated by the Class A-R Certificate, and (d) we intend to pay any taxes
associated with holding the Class A-R Certificate as they become due and (e) we
will not cause income from the Class A-R Certificate to be attributable to a
foreign permanent establishment or fixed base (within the meaning of an
applicable income tax treaty) of ours or another U.S. taxpayer.


                                      E-1-1

<PAGE>

3. We acknowledge that we will be the beneficial owner of the Class A-R
Certificate and:(1)

          __________ The Class A-R Certificate will be registered in our name.

          __________ The Class A-R Certificate will be held in the name of our
          nominee, _________________, which is not a disqualified organization.

4. We certify that we are not an employee benefit plan subject to Title I of the
Employee Retirement Income Security Act of 1974, as amended ("ERISA"), a plan
subject to Section 4975 of the Code or a plan subject to federal, state, local,
non-U.S. or other law substantively similar to the foregoing provisions of ERISA
or the Code (each, a "Plan"), and are not directly or indirectly acquiring the
Class A-R Certificate on behalf of or with any assets of a Plan.

5. We certify that (i) we are a U.S. person or (ii) we will hold the Class A-R
Certificate in connection with the conduct of a trade or business within the
United States and have furnished the transferor and the Securities Administrator
with a duly completed and effective Internal Revenue Service Form W-8ECI or
successor form at the time and in the manner required by the Code; for this
purpose the term "U.S. person" means a citizen or resident of the United States,
a corporation, or partnership (unless, in the case of a partnership, Treasury
regulations are adopted that provide otherwise) created or organized in or under
the laws of the United States, any State thereof or the District of Columbia,
including an entity treated as a corporation or partnership for federal income
tax purposes, an estate whose income is subject to United States federal income
tax regardless of the source of its income, or a trust if a court within the
United States is able to exercise primary supervision over the administration of
the trust and one or more such U.S. persons have the authority to control all
substantial decisions of the trust (or, to the extent provided in applicable
Treasury regulations, certain trusts in existence on August 20, 1996 which are
eligible to elect to be treated as U.S. Persons. We agree that any breach by us
of this certification shall render the transfer of any interest in the Class A-R
Certificate to us absolutely null and void and shall cause no rights in the
Class A-R Certificate to vest in us.

6. We agree that in the event that at some future time we wish to transfer any
interest in the Class A-R Certificate, we will transfer such interest in the
Class A-R Certificate only (a) to a transferee that (i) is not a disqualified
organization and is not purchasing such interest in the Class A-R Certificate on
behalf of a disqualified organization, (ii) is a U.S. person or will hold the
Class A-R Certificate in connection with the conduct of a trade or business
within the United States and will furnish us and the Securities Administrator
with a duly completed and effective Internal Revenue Service Form W-8ECI or
successor form at the time and in the manner required by the Code and (iii) has
delivered to the Securities Administrator a letter in the form of this letter
(including the affidavit appended hereto) and, we will provide the Securities
Administrator a written statement substantially in the form of Exhibit E-2 to
the Pooling and Servicing Agreement.

7. We hereby designate _______________________ as our fiduciary to act as the
tax matters person for each of the REMICs provided for in the Pooling and
Servicing Agreement in which the Class A-R Certificate represents the residual
interest.

----------
(1)  Check appropriate box and if necessary fill in the name of the Transferee's
     nominee.


                                      E-1-2

<PAGE>

                                        Very truly yours,

                                        [Purchaser]


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------

Accepted as of __________ __, 200__


MERRILL LYNCH MORTGAGE INVESTORS, INC.


By:
    ---------------------------------
Name:
      -------------------------------
Title:
       ------------------------------


                                      E-1-3

<PAGE>

                                   APPENDIX A

                                        Affidavit pursuant to (i) Section
                                        860E(e)(4) of the Internal Revenue Code
                                        of 1986, as amended, and (ii) certain
                                        provisions of the Pooling and Servicing
                                        Agreement

Under penalties of perjury, the undersigned declares that the following is true:

          1.   He or she is an officer of _________________________ (the
               "Investor"),

          2.   the Investor's Employer Identification number is __________,

          3.   the Investor is not a "disqualified organization" (as defined
               below), has no plan or intention of becoming a disqualified
               organization, and is not acquiring any of its interest in the
               Merrill Lynch Mortgage Backed Securities Trust, Series 2007-1
               Mortgage Pass-Through Certificates, Class A-R Certificate on
               behalf of a disqualified organization or any other entity,

          4.   unless Merrill Lynch Mortgage Investors, Inc. ("MLMI") has
               consented to the transfer to the Investor, the Investor is a
               "U.S. person" (as defined below),

          5.   that no purpose of the transfer is to avoid or impede the
               assessment or collection of tax,

          6.   the Investor has historically paid its debts as they became due,

          7.   the Investor intends, and believes that it will be able, to
               continue to pay its debts as they become due in the future,

          8.   the Investor understands that, as beneficial owner of the Class
               A-R Certificate, it may incur tax liabilities in excess of any
               cash flows generated by the Class A-R Certificate,

          9.   the Investor intends to pay any taxes associated with holding the
               Class A-R Certificate as they become due,

          10.  the Investor consents to any amendment of the Pooling and
               Servicing Agreement that shall be deemed necessary by MLMI (upon
               advice of counsel) to constitute a reasonable arrangement to
               ensure that the Class A-R Certificate will not be owned directly
               or indirectly by a disqualified organization, and

          11.  IF BRACKETED, THE FOLLOWING CERTIFICATIONS ARE INAPPLICABLE [the
               transfer is not a direct or indirect transfer of the Class A-R
               Certificate to a foreign permanent establishment or fixed base
               (within the meaning of an applicable income tax treaty) of the
               Investor, and as to each of the residual interests represented by
               the Class A-R Certificate, the present value of the anticipated
               tax liabilities associated with holding such residual interest
               does not exceed the sum of:


                                      E-1-4

<PAGE>

               A.   the present value of any consideration given to the Investor
                    to acquire such residual interest;

               B.   the present value of the expected future distributions on
                    such residual interest; and

               C.   the present value of the anticipated tax savings associated
                    with holding such residual interest as the related REMIC
                    generates losses.

     For purposes of this declaration, (i) the Investor is assumed to pay tax at
     a rate equal to the highest rate of tax specified in Section 11(b)(1) of
     the Code, but the tax rate specified in Section 55(b)(1)(B) of the Code may
     be used in lieu of the highest rate specified in Section 11(b)(1) of the
     Code if the Investor has been subject to the alternative minimum tax under
     Section 55 of the Code in the preceding two years and will compute its
     taxable income in the current taxable year using the alternative minimum
     tax rate, and (ii) present values are computed using a discount rate equal
     to the Federal short-term rate prescribed by Section 1274(d) of the Code
     for the month of the transfer and the compounding period used by the
     Investor;]

[(11)   (A)  at the time of the transfer, and at the close of each of the
             Investor's two fiscal years preceding the Investor's fiscal year of
             transfer, the Investor's gross assets for financial reporting
             purposes exceed $100 million and its net assets for financial
             reporting purposes exceed $10 million; and

        (B)  the Investor is an eligible corporation as defined in Treasury
             regulations Section 1.860E-1(c)(6)(i) and has agreed in writing
             that any subsequent transfer of the Class A-R Certificate will be
             to another eligible corporation in a transaction that satisfies
             Treasury regulation Sections 1.860E-1(c)(4)(i), 1.860E-1(c)(4)(ii),
             1.860E-1(c)(4)(iii) and 1.860E-1(c)(5) and such transfer will not
             be a direct or indirect transfer to a foreign permanent
             establishment (within the meaning of an applicable income tax
             treaty) of a domestic corporation.

For purposes of this declaration, the gross and net assets of the Investor do
not include any obligation of any related person as defined in Treasury
regulation Section 1.860E-1(c)(6)(ii) or any other asset if a principal purpose
for holding or acquiring the other asset is to permit the Investor to make this
declaration or to satisfy the requirements of Treasury regulation Section
1.860E-1(c)(5)(i).]

(12) The Investor will not cause income from the Class A-R Certificate to be
attributable to a foreign permanent establishment or fixed base (within the
meaning of an applicable income tax treaty) of the Investor or another U.S.
taxpayer.


                                      E-1-5

<PAGE>

For purpose of this affidavit, the term "disqualified organization" means the
United States, any state or political subdivision thereof, any foreign
government, any international organization, any agency or instrumentality of any
of the foregoing (except any entity treated as other than an instrumentality of
the foregoing for purposes of Section 168(h)(2)(D) of the Internal Revenue Code
of 1986, as amended (the "Code")), any organization (other than a cooperative
described in Section 521 of the Code) that is exempt from taxation under the
Code (unless such organization is subject to tax on excess inclusions) and any
organization that is described in Section 1381(a)(2)(C) of the Code and the term
"U.S. Person" means a citizen or resident of the United States, a corporation or
partnership (unless, in the case of a partnership, Treasury regulations are
adopted that provide otherwise) created or organized in or under the laws of the
United States, any state thereof or the District of Columbia, including an
entity treated as a corporation or partnership for federal income tax purposes,
an estate whose income is subject to Unites States federal income tax regardless
of its source, or a trust if a court within the United States is able to
exercise primary supervision over the administration of such trust, and one or
more such U.S. Persons have the authority to control all substantial decisions
of such trust, (or, to the extent provided in applicable Treasury regulations,
certain trusts in existence on August 20, 1996 which are eligible to elect to be
treated as U.S. Persons).


                                      E-1-6

<PAGE>

IN WITNESS WHEREOF, the Investor has caused this instrument to be executed on
its behalf, pursuant to authority of its Board of Directors, by its
_____________ this ___ day of ______________, 20__.

                                        [INVESTOR]


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------

Personally appeared before me the above-named _______________________, known or
proved to me to be the same person who executed the foregoing instrument and to
be the ____________________________ of the Investor, and acknowledged to me that
he executed the same as his free act and deed and the free act and deed of the
Investor.

Subscribed and sworn before me this ___ day of ______________, 20__.

NOTARY PUBLIC


----------------------------------------

COUNTY OF_____________________

STATE OF______________________

My commission expires the _____ day of __________ 20__.


                                      E-1-7
<PAGE>

                                   EXHIBIT E-2
                         FORM OF TRANSFEROR CERTIFICATE

                                     [DATE]

Wells Fargo Bank, N.A.
9062 Old Annapolis Road
Columbia, MD 21045
Attention: Corporate Trust Services - Merrill Lynch Mortgage Backed Securities
Trust, Series 2007-1

Re: Merrill Lynch Mortgage Backed Securities Trust, Series 2007-1

_______________________ (the "Transferor") has reviewed the attached affidavit
of _____________________________ (the "Transferee"), and has no actual knowledge
that such affidavit is not true, and has no reason to believe that the
Transferee has the intention to impede the assessment or collection of any
federal, state or local taxes legally required to be paid with respect to the
Class A-R Certificate referred to in the attached affidavit. In addition, the
Transferor has conducted a reasonable investigation at the time of the transfer
and found that the Transferee had historically paid its debts as they came due
and found no significant evidence to indicate that the Transferee will not
continue to pay its debts as they become due.

                                        Very truly yours,

                                        [Transferor]


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


                                      E-2-1

<PAGE>

                                   EXHIBIT F-1
                    FORM OF TRANSFEROR REPRESENTATION LETTER

                                                           ______________, 200__

Merrill Lynch Mortgage Investors, Inc.
4 World Financial Center
New York, New York 10281

Wells Fargo Bank, N.A.
9062 Old Annapolis Road
Columbia, MD 21045

     Re: Merrill Lynch Mortgage Backed Securities Trust, Mortgage Pass-Through
         Certificates, Series 2007-1, Class [__]

Ladies and Gentlemen:

     In connection with the sale by ___________ (the "Seller") to ________ (the
"Purchaser") of $_________ Initial Certificate Principal Balance of Mortgage
Pass-Through Certificates, Series 2007-1, Class _____ (the "Certificates"),
issued pursuant to the Pooling and Servicing Agreement (the "Pooling and
Servicing Agreement"), dated as of March 1, 2007 among Merrill Lynch Mortgage
Investors, Inc., as depositor (the "Depositor"), Wells Fargo Bank, N.A. as
master servicer (in such capacity, the "Master Servicer") and securities
administrator (in such capacity, the "Securities Administrator"), and HSBC Bank
USA, National Association, as trustee (the "Trustee"). The Seller hereby
certifies, represents and warrants to, and covenants with, the Depositor and the
Securities Administrator that:

     Neither the Seller nor anyone acting on its behalf has (a) offered,
pledged, sold, disposed of or otherwise transferred any Certificate, any
interest in any Certificate or any other similar security to any person in any
manner, (b) has solicited any offer to buy or to accept a pledge, disposition or
other transfer of any Certificate, any interest in any Certificate or any other
similar security from any person in any manner, (c) has otherwise approached or
negotiated with respect to any Certificate, any interest in any Certificate or
any other similar security with any person in any manner, (d) has made any
general solicitation by means of general advertising or in any other manner, or
(e) has taken any other action, that (as to any of (a) through (e) above) would
constitute a distribution of the Certificates under the Securities Act of 1933
(the "Act"), that would render the disposition of any Certificate a violation of
Section 5 of the Act or any state securities law, or that would require
registration or qualification pursuant thereto. The Seller will not act in any
manner set forth in the foregoing sentence with respect to any Certificate. The
Seller has not and will not sell or otherwise transfer any of the Certificates,
except in compliance with the provisions of the Pooling and Servicing Agreement.


                                      F-1-1

<PAGE>

                                        Very truly yours,


                                        ----------------------------------------
                                        (Seller)


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


                                      F-1-2

<PAGE>

                                   EXHIBIT F-2
             FORM OF INVESTOR REPRESENTATION LETTER (NON-RULE 144A)

                                                               __________, 200__

Merrill Lynch Mortgage Investors, Inc.
4 World Financial Center
New York, New York 10281

Wells Fargo Bank, N.A.
9062 Old Annapolis Road
Columbia, MD 21045

     Re: Merrill Lynch Mortgage Backed Securities Trust, Mortgage Pass-Through
         Certificates, Series 2007-1, Class [_]

Ladies and Gentlemen:

     In connection with our acquisition of the above Certificates we certify
that (a) we understand that the Certificates are not being registered under the
Securities Act of 1933, as amended (The "Act"), or any state securities laws and
are being transferred to us in a transaction that is exempt from the
registration requirements of the Act and any such laws, (b) we are an
institutional "accredited investor," as defined in Regulation D under the Act,
and have such knowledge and experience in financial and business matters that we
are capable of evaluating the merits and risks of investments in the
Certificates, (c) we have had the opportunity to ask questions of and receive
answers from the Depositor concerning the purchase of the Certificates and all
matters relating thereto or any additional information deemed necessary to our
decision to purchase the Certificates, (d) solely in the case of an ERISA
Restricted Certificate, we (i) are not an employee benefit plan or arrangement
subject to Title I of the Employee Retirement Income Security Act of 1974, as
amended ("ERISA"), a plan subject to Section 4975 of the Internal Revenue Code
of 1986, as amended (the "Code") or a plan subject to any provisions under any
federal, state, local, non-U.S. or other laws or regulations that are
substantively similar to foregoing provisions of ERISA or the Code ("Similar
Law") (collectively, a "Plan"), and are not directly or indirectly acquiring
this Certificate for, on behalf of or with any assets of any such Plan, (ii) if
the Certificate has been the subject of an ERISA-Qualifying Underwriting, are an
insurance company that is acquiring the Certificate with assets of an "insurance
company general account" as defined in Section V(E) of Prohibited Transaction
Class Exemption ("PTCE") 95-60, and the acquisition and holding of the
Certificate are covered and exempt under Sections I and III of PTCE 95-60, or
(iii) solely in the case of a Definitive Certificate, shall deliver herewith an
Opinion of Counsel satisfactory to the Securities Administrator, and upon which
the Securities Administrator shall be entitled to rely, to the effect that the
acquisition and holding of this certificate by the transferee will not result in
a nonexempt prohibited transaction under ERISA or the Code, or a violation of
Similar Law, and will not subject the Depositor, the Master Servicer, the
Securities Administrator or the Trustee to any obligation in addition to those
undertaken by such entities in the Pooling and Servicing Agreement, which
Opinion of Counsel shall not be an expense of the Depositor, the Master
Servicer, the Securities Administrator or the Trustee, (e) we are acquiring the
Certificates for investment for our own account and not with a


                                      F-2-1

<PAGE>

view to any distribution of such Certificates (but without prejudice to our
right at all times to sell or otherwise dispose of the Certificates in
accordance with clause (g) below), (f) we have not offered or sold any
Certificates to, or solicited offers to buy any Certificates from, any person,
or otherwise approached or negotiated with any person with respect thereto, or
taken any other action which would result in a violation of Section 5 of the
Act, and (g) we will not sell, transfer or otherwise dispose of any Certificates
unless (1) such sale, transfer or other disposition is made pursuant to an
effective registration statement under the Act or is exempt from such
registration requirements, and if requested, we will at our expense provide an
opinion of counsel satisfactory to the addressees of this Certificate that such
sale, transfer or other disposition may be made pursuant to an exemption from
the Act, (2) The purchaser or transferee of such Certificate has executed and
delivered to you a certificate to substantially the same effect as this
certificate, and (3) The purchaser or transferee has otherwise complied with any
conditions for transfer set forth in the Pooling and Servicing Agreement.

                                        Very truly yours,

                                        ----------------------------------------
                                        Print Name of Transferee


                                        By:
                                            ------------------------------------
                                            Authorized Officer


                                      F-2-2

<PAGE>

                                   EXHIBIT F-3
                            FORM OF RULE 144A LETTER

                                                              ____________, 2007

Merrill Lynch Mortgage Investors, Inc.
4 World Financial Center
New York, New York 10281

Wells Fargo Bank, N.A.
9062 Old Annapolis Road
Columbia, MD 21045

     Re: Merrill Lynch Mortgage Backed Securities Trust, Mortgage Pass-Through
         Certificates, Series 2007-1, Class [_]

Ladies and Gentlemen:

     In connection with our acquisition of the above Certificates we certify
that (a) we understand that the Certificates are not being registered under the
Securities Act of 1933, as amended (The "Act"), or any state securities laws and
are being transferred to us in a transaction that is exempt from the
registration requirements of the Act and any such laws, (b) we have such
knowledge and experience in financial and business matters that we are capable
of evaluating the merits and risks of investments in the Certificates, (c) we
have had the opportunity to ask questions of and receive answers from the
Depositor concerning the purchase of the Certificates and all matters relating
thereto or any additional information deemed necessary to our decision to
purchase the Certificates, (d) solely in the case of an ERISA Restricted
Certificate, we (i) are not an employee benefit plan or arrangement subject to
Title I of the Employee Retirement Income Security Act of 1974, as amended
("ERISA"), a plan subject to Section 4975 of the Internal Revenue Code of 1986,
as amended (the "Code") or a plan subject to any provisions under any federal,
state, local, non-U.S. or other laws or regulations that are substantively
similar to foregoing provisions of ERISA or the Code ("Similar Law")
(collectively, a "Plan"), and are not directly or indirectly acquiring this
Certificate for, on behalf of or with any assets of any such Plan, (ii) if the
Certificate has been the subject of an ERISA-Qualifying Underwriting, are an
insurance company that is acquiring the Certificate with assets of an "insurance
company general account" as defined in Section V(E) of Prohibited Transaction
Class Exemption ("PTCE") 95-60, and the acquisition and holding of the
Certificate are covered and exempt under Sections I and III of PTCE 95-60, or
(iii) solely in the case of a Definitive Certificate, shall deliver herewith an
Opinion of Counsel satisfactory to the Securities Administrator, and upon which
the Securities Administrator shall be entitled to rely, to the effect that the
acquisition and holding of this certificate by the transferee will not result in
a nonexempt prohibited transaction under ERISA or the Code, or a violation of
Similar Law, and will not subject the Depositor, the Master Servicer, the
Securities Administrator or the Trustee to any obligation in addition to those
undertaken by such entities in the Pooling and Servicing Agreement, which
Opinion of Counsel shall not be an expense of the Depositor, the Master
Servicer, the Securities Administrator or the Trustee, (e) we have not, nor has
anyone acting on our behalf offered, transferred, pledged, sold or otherwise
disposed of the Certificates, any interest in the Certificates or any other
similar


                                      F-3-1

<PAGE>

security to, or solicited any offer to buy or accept a transfer, pledge or other
disposition of the Certificates, any interest in the Certificates or any other
similar security from, or otherwise approached or negotiated with respect to the
Certificates, any interest in the Certificates or any other similar security
with, any person in any manner, or made any general solicitation by means of
general advertising or in any other manner, or taken any other action, that
would constitute a distribution of the Certificates under the Act or that would
render the disposition of the Certificates a violation of Section 5 of the Act
or require registration pursuant thereto, nor will act, nor has authorized or
will authorize any person to act, in such manner with respect to the
Certificates, (f) we are a "qualified institutional buyer" as that term is
defined in Rule 144A under the Act ("Rule 144A") and have completed either of
the forms of certification to that effect attached hereto as Annex 1 or Annex 2,
(g) we are aware that the sale to us is being made in reliance on Rule 144A, and
(h) we are acquiring the Certificates for our own account or for resale pursuant
to Rule 144A and further, understand that such Certificates may be resold,
pledged or transferred only (A) to a person reasonably believed to be a
qualified institutional buyer that purchases for its own account or for the
account of a qualified institutional buyer to whom notice is given that the
resale, pledge or transfer is being made in reliance on Rule 144A, or (B)
pursuant to another exemption from registration under the Act.

                                        Very truly yours,

                                        ----------------------------------------
                                        Print Name of Transferee


                                        By:
                                            ------------------------------------
                                            Authorized Officer


                                      F-3-2

<PAGE>

                                                          ANNEX I TO EXHIBIT F-3

            QUALIFIED INSTITUTIONAL BUYER STATUS UNDER SEC RULE 144A

[For Transferees Other Than Registered Investment Companies]

     The undersigned (The "Buyer") hereby certifies as follows to the parties
listed in the Rule 144A Transferee Certificate to which this certification
relates with respect to the Certificates described therein:

     1. As indicated below, The undersigned is the President, Chief Financial
Officer, Senior Vice President or other executive officer of the Buyer.

     2. In connection with purchases by the Buyer, The Buyer is a "qualified
institutional buyer" as that term is defined in Rule 144A under the Securities
Act of 1933, as amended ("Rule 144A") because (i) The Buyer owned and/or
invested on a discretionary basis $___________(1) in securities (except for the
1 excluded securities referred to below) as of the end of the Buyer's most
recent fiscal year (such amount being calculated in accordance with Rule 144A
and (ii) The Buyer satisfies the criteria in the category marked below.

     ___ Corporation, etc. The Buyer is a corporation (other than a bank,
savings and loan association or similar institution), Massachusetts or similar
business trust, partnership, or charitable organization described in Section
501(c)(3) of the Internal Revenue Code of 1986, as amended.

     ___ Bank. The Buyer (a) is a national bank or banking institution organized
under the laws of any State, territory or the District of Columbia, The business
of which is substantially confined to banking and is supervised by the State or
territorial banking commission or similar official or is a foreign bank or
equivalent institution, and (b) has an audited net worth of at least $25,000,000
as demonstrated in its latest annual financial statements, a copy of which is
attached hereto.

     ___ Savings and Loan. The Buyer (a) is a savings and loan association,
building and loan association, cooperative bank, homestead association or
similar institution, which is supervised and examined by a State or Federal
authority having supervision over any such institutions or is a foreign savings
and loan association or equivalent institution and (b) has an audited net worth
of at least $25,000,000 as demonstrated in its latest annual financial
statements, a copy of which is attached hereto.

     ___ Broker-dealer. The Buyer is a dealer registered pursuant to Section 15
of the Securities Exchange Act of 1934.

     ___ Insurance Company. The Buyer is an insurance company whose primary and
predominant business activity is the writing of insurance or the reinsuring of
risks underwritten

----------
(1)  Buyer must own and/or invest on a discretionary basis at least $100,000,000
     in securities unless Buyer is a dealer, and, in that case, Buyer must own
     and/or invest on a discretionary basis at least $10,000,000 in securities.


                                      F-3-3

<PAGE>

by insurance companies and which is subject to supervision by the insurance
commissioner or a similar official or agency of a State, territory or the
District of Columbia.

     ___ State or Local Plan. The Buyer is a plan established and maintained by
a State, its political subdivisions, or any agency or instrumentality of the
State or its political subdivisions, for the benefit of its employees.

     ___ ERISA Plan. The Buyer is an employee benefit plan within the meaning of
Title I of the Employee Retirement Income Security Act of 1974.

     ___ Investment Advisor. The Buyer is an investment advisor registered under
the Investment Advisors Act of 1940.

     ___ Small Business Investment Company. Buyer is a small business investment
company licensed by the U.S. Small Business Administration under Section 301(c)
or (d) of the Small Business Investment Act of 1958.

     ___ Business Development Company. Buyer is a business development company
as defined in Section 202(a)(22) of the Investment Advisors Act of 1940.

     3. The term "securities" as used herein does not include (i) securities of
issuers that are affiliated with the Buyer, (ii) securities that are part of an
unsold allotment to or subscription by the Buyer, if the Buyer is a dealer,
(iii) securities issued or guaranteed by the U.S. or any instrumentality
thereof, (iv) bank deposit notes and certificates of deposit, (v) loan
participations, (vi) repurchase agreements, (vii) securities owned but subject
to a repurchase agreement and (viii) currency, interest rate and commodity
swaps.

     4. For purposes of determining the aggregate amount of securities owned
and/or invested on a discretionary basis by the Buyer, The Buyer used the cost
of such securities to the Buyer and did not include any of the securities
referred to in the preceding paragraph, except (i) where the Buyer reports its
securities holdings in its financial statements on the basis of their market
value, and (ii) no current information with respect to the cost of those
securities has been published. If clause (ii) in the preceding sentence applies,
The securities may be valued at market. Further, in determining such aggregate
amount, The Buyer may have included securities owned by subsidiaries of the
Buyer, but only if such subsidiaries are consolidated with the Buyer in its
financial statements prepared in accordance with generally accepted accounting
principles and if the investments of such subsidiaries are managed under the
Buyer's direction. However, such securities were not included if the Buyer is a
majority-owned, consolidated subsidiary of another enterprise and the Buyer is
not itself a reporting company under the Securities Exchange Act of 1934, as
amended.

     5. The Buyer acknowledges that it is familiar with Rule 144A and
understands that the seller to it and other parties related to the Certificates
are relying and will continue to rely on the statements made herein because one
or more sales to the Buyer may be in reliance on Rule 144A.


                                      F-3-4

<PAGE>

     6. Until the date of purchase of the Rule 144A Securities, The Buyer will
notify each of the parties to which this certification is made of any changes in
the information and conclusions herein. Until such notice is given, The Buyer's
purchase of the Certificates will constitute a reaffirmation of this
certification as of the date of such purchase. In addition, if the Buyer is a
bank or savings and loan is provided above, The Buyer agrees that it will
furnish to such parties updated annual financial statements promptly after they
become available.

                                        ----------------------------------------
                                        Print Name of Buyer


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------

                                        Date:
                                              ----------------------------------


                                      F-3-5

<PAGE>

                                                         ANNEX II TO EXHIBIT F-3

            QUALIFIED INSTITUTIONAL BUYER STATUS UNDER SEC RULE 144A
           [For Transferees That are Registered Investment Companies]

     The undersigned (The "Buyer") hereby certifies as follows to the parties
listed in the Rule 144A Transferee Certificate to which this certification
relates with respect to the Certificates described therein:

1. As indicated below, The undersigned is the President, Chief Financial Officer
or Senior Vice President of the Buyer or, if the Buyer is a "qualified
institutional buyer" as that term is defined in Rule 144A under the Securities
Act of 1933, as amended ("Rule 144A") because Buyer is part of a Family of
Investment Companies (as defined below), is such an officer of the Adviser.

2. In connection with purchases by Buyer, The Buyer is a "qualified
institutional buyer" as defined in SEC Rule 144A because (i) The Buyer is an
investment company registered under the Investment Company Act of 1940, as
amended and (ii) as marked below, The Buyer alone, or the Buyer's Family of
Investment Companies, owned at least $100,000,000 in securities (other than the
excluded securities referred to below) as of the end of the Buyer's most recent
fiscal year. For purposes of determining the amount of securities owned by the
Buyer or the Buyer's Family of Investment Companies, The cost of such securities
was used, except (i) where the Buyer or the Buyer's Family of Investment
Companies reports its securities holdings in its financial statements on the
basis of their market value, and (ii) no current information with respect to the
cost of those securities has been published. If clause (ii) in the preceding
sentence applies, The securities may be valued at market.

     ___ The Buyer owned $ in securities (other than the excluded securities
referred to below) as of the end of the Buyer's most recent fiscal year (such
amount being calculated in accordance with Rule 144A).

     ___ The Buyer is part of a Family of Investment Companies which owned in
the aggregate $ in securities (other than the excluded securities referred to
below) as of the end of the Buyer's most recent fiscal year (such amount being
calculated in accordance with Rule 144A).

3. The term "Family of Investment Companies" as used herein means two or more
registered investment companies (or series thereof) that have the same
investment adviser or investment advisers that are affiliated (by virtue of
being majority owned subsidiaries of the same parent or because one investment
adviser is a majority owned subsidiary of the other).

4. The term "securities" as used herein does not include (i) securities of
issuers that are affiliated with the Buyer or are part of the Buyer's Family of
Investment Companies, (ii) securities issued or guaranteed by the U.S. or any
instrumentality thereof, (iii) bank deposit notes and certificates of deposit,
(iv) loan participations, (v) repurchase agreements, (vi) securities owned but
subject to a repurchase agreement and (vii) currency, interest rate and
commodity swaps.


                                      F-3-6

<PAGE>

5. The Buyer is familiar with Rule 144A and understands that the parties listed
in the Rule 144A Transferee Certificate to which this certification relates are
relying and will continue to rely on the statements made herein because one or
more sales to the Buyer will be in reliance on Rule 144A. In addition, The Buyer
will only purchase for the Buyer's own account.

6. Until the date of purchase of the Certificates, The undersigned will notify
the parties listed in the Rule 144A Transferee Certificate to which this
certification relates of any changes in the information and conclusions herein.
Until such notice is given, The Buyer's purchase of the Certificates will
constitute a reaffirmation of this certification by the undersigned as of the
date of such purchase.

                                        ----------------------------------------
                                        Print Name of Buyer or Adviser


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


                                        IF AN ADVISER:

                                        ----------------------------------------
                                        Print Name of Buyer

                                        Date:
                                              ----------------------------------


                                      F-3-7
<PAGE>

                                    EXHIBIT G
                           FORM OF CUSTODIAL AGREEMENT

          THIS CUSTODIAL AGREEMENT (as amended and supplemented from time to
time, the "Agreement"), dated as of March 30, 2007, by and among HSBC BANK USA,
NATIONAL ASSOCIATION, as trustee (including its successors under the Pooling and
Servicing Agreement defined below, the "Trustee"), MERRILL LYNCH MORTGAGE
INVESTORS, INC., as company (together with any successor in interest, the
"Company"), WELLS FARGO BANK, N.A., as securities administrator and master
servicer (together with any successor in interest or successor under the Pooling
and Servicing Agreement referred to below, the "Master Servicer") and WELLS
FARGO BANK, N.A., as custodian (together with any successor in interest or any
successor appointed hereunder, the "Custodian").

                                WITNESSETH THAT:

          WHEREAS, the Company, the Master Servicer and the Trustee have entered
into a Pooling and Servicing Agreement, dated as of March 1, 2007, relating to
the issuance of Merrill Lynch Mortgage Backed Securities Trust, Series 2007-1
Mortgage Pass-Through Certificates, (as in effect on the date of this agreement,
the "Original Pooling and Servicing Agreement," and as amended and supplemented
from time to time, the "Pooling and Servicing Agreement"); and

          WHEREAS, the Custodian has agreed to act as agent for the Trustee for
the purposes of receiving and holding certain documents and other instruments
delivered by the Company or the Master Servicer under the Pooling and Servicing
Agreement and the Servicers under the their respective Servicing Agreements, all
upon the terms and conditions and subject to the limitations hereinafter set
forth;

          NOW, THEREFORE, in consideration of the premises and the mutual
covenants and agreements hereinafter set forth, the Trustee, the Company, the
Master Servicer and the Custodian hereby agree as follows:


                                       G-1

<PAGE>

                                    ARTICLE I
                                   DEFINITIONS

          Capitalized terms used in this Agreement and not defined herein shall
have the meanings assigned in the Original Pooling and Servicing Agreement,
unless otherwise required by the context herein.

                                   ARTICLE II
                          CUSTODY OF MORTGAGE DOCUMENTS

          Section 2.01 Custodian to Act as Agent: Acceptance of Mortgage Files,
Attestations and Assessments of Compliance.

          (a) The Custodian, as the duly appointed agent of the Trustee for
these purposes, acknowledges (subject to any exceptions noted in the Initial
Certification referred to in Section 2.3(a)) receipt of the Mortgage Files
relating to the Mortgage Loans identified on the schedule attached hereto (the
"Mortgage Files") and declares that it holds and will hold such Mortgage Files
as agent for the Trustee, in trust, for the use and benefit of all present and
future Certificateholders.

          (b) On or before March 1st of each calendar year, beginning with March
1, 2008, the Custodian shall, at its own expense, cause a firm of independent
public accountants (who may also render other services to Custodian), which is a
member of the American Institute of Certified Public Accountants, to furnish to
the Company and the Master Servicer a report to the effect that such firm
attests to, and reports on, the assessment made by such asserting party pursuant
to Section 2.01(c) below, which report shall be made in accordance with
standards for attestation engagements issued or adopted by the Public Company
Accounting Oversight Board.

          (c) On or before March 1st of each calendar year, beginning with March
1, 2008, the Custodian shall deliver to the Company and the Master Servicer a
report regarding its assessment of compliance with the servicing criteria
identified in Exhibit Three attached hereto, as of and for the period ending the
end of the fiscal year ending no later than December 31 of the year prior to the
year of delivery of the report, with respect to asset-backed security
transactions taken as a whole in which the Custodian is performing any of the
servicing criteria specified in Exhibit Three and that are backed by the same
asset type backing such asset-backed securities. Each such report shall include
(a) a statement of the party's responsibility for assessing compliance with the
servicing criteria applicable to such party, (b) a statement that such party
used the criteria identified in Item 1122(d) of Regulation AB (Section
229.1122(d)) to assess the compliance with the applicable servicing criteria,
(c) disclosure of any material instance of noncompliance identified by such
party, and (d) a statement that a registered public accounting firm has issued
an attestation report on such party's assessment of compliance with the
applicable servicing criteria, which report shall be delivered by the Custodian
as provided in this Section 2.01(c). However, the Custodian's obligation to
provide a report on assessment of compliance or an attestation with respect to
itself and with respect to any Subcontractor shall be suspended in any year in
which the Issuing Entity's reporting obligations under the Exchange Act are
suspended.


                                      G-2

<PAGE>

          (d) The Custodian has not and shall not engage any Subcontractor which
is "participating in the servicing function" within the meaning of Item 1122 of
Regulation AB, unless such Subcontractor agrees to provide in any year in which
a Form 10-K will be filed by the Trust., no later than March 1st of such year,
an assessment and a statement of registered public accounting firm certifying
its compliance with the applicable servicing criteria in Item 1122(d) of
Regulation AB as of and for the period ending the end of the fiscal year ending
no later than December 31 of the year prior to the year of delivery of the
report. "Subcontractor" as used herein means any vendor, subcontractor or other
Person that is not responsible for the overall servicing (as "servicing" is
commonly understood by participants in the mortgage-backed securities market) of
the Mortgage Loans but performs one or more discrete functions identified in
Item 1122(d) of Regulation AB with respect to the Mortgage Loans under the
direction or authority of the Custodian.

          (e) The Custodian agrees to indemnify the Company, the Master
Servicer, the Trust Fund and each of their respective directors, officers,
employees and agents and hold each of them harmless from and against any losses,
damages, penalties, fines, forfeitures, legal fees and expenses and related
costs, judgments, and any other costs, fees and expenses that any of them may
sustain arising out of or based upon the engagement of any Subcontractor in
violation of Section 2.01(d) or any failure by the Custodian to deliver any
information, report, certification, accountants' letter or other material when
and as required under this Agreement, including any report under Sections
2.01(b) or 2.01(c).

          Section 2.02 Recordation of Assignments. If any Mortgage File includes
one or more assignments of Mortgage to the Trustee in a state which is
specifically excluded from the Opinion of Counsel delivered by the Mortgage Loan
Seller to the Trustee (with a copy to the Custodian) pursuant to the provisions
of Section 2.01 of the Pooling and Servicing Agreement, the Custodian shall
deliver each such assignment to the Company for the purpose of recording it in
the appropriate public office for real property records, and the Company, at no
expense to the Custodian, shall promptly cause to be recorded in the appropriate
public office for real property records each such assignment of Mortgage and,
upon receipt thereof from such public office, shall return each such assignment
of Mortgage to the Custodian.

          Section 2.03 Review of Mortgage Files.

          (a) On or prior to the Closing Date, the Custodian agrees, for the
benefit of Certificateholders, to review, in accordance with the provisions of
Section 2.02 of the Pooling and Servicing Agreement, each such document, and
shall deliver to the Trustee an Initial Certification in the form annexed hereto
as Exhibit One evidencing receipt (subject to any exceptions noted therein) of a
Mortgage File for each of the Mortgage Loans listed on the Schedule attached
hereto (the "Mortgage Loan Schedule") and certifying that all such documents
have been executed and received and that such documents relate to the Mortgage
Loans identified on the Mortgage Loan Schedule, except for any exceptions listed
on Schedule A attached to such Initial Certification. The Custodian shall be
under no duty or obligation to inspect, review or examine said documents,
instruments, certificates or other papers to determine that the same are
genuine, enforceable, or appropriate for the represented purpose or that they
have actually been recorded or that they are other than what they purport to be
on their face.


                                      G-3

<PAGE>

          (b) Not later than 180 days after the Closing Date, the Custodian
shall review the Mortgage Files as provided in Section 2.02 of the Pooling and
Servicing Agreement and deliver to the Trustee a Final Certification in the form
annexed hereto as Exhibit Two evidencing the completeness of the Mortgage Files
(subject to any exceptions noted therein).

          (c) In reviewing the Mortgage Files as provided herein and in the
Pooling and Servicing Agreement, the Custodian shall make no representation as
to and shall not be responsible to verify (i) the validity, legality,
enforceability, due authorization, recordability, sufficiency or genuineness of
any of the documents included in any Mortgage File or (ii) the collectibility,
insurability, effectiveness or suitability of any of the documents in any
Mortgage File.

          Upon receipt of written request from the Trustee, the Custodian shall
as soon as practicable supply the Trustee with a list of all of the documents
relating to the Mortgage Loans then contained in the Mortgage Files.

          Section 2.04 Notification of Breaches of Representations and
Warranties. Upon discovery by the Custodian of a breach of any representation or
warranty made by the Company as set forth in the Pooling and Servicing Agreement
with respect to a Mortgage Loan relating to a Mortgage File, the Custodian shall
give prompt written notice to the Company, the related Servicer and the Trustee.

          Section 2.05 Custodian to Cooperate: Release of Mortgage Files. Upon
receipt of written notice from the Master Servicer that the Mortgage Loan Seller
has repurchased a Mortgage Loan pursuant to Article II of the Pooling and
Servicing Agreement, and that the purchase price therefor has been deposited in
the Master Servicer Collection Account or the Distribution Account, then the
Custodian agrees to promptly release to the Mortgage Loan Seller the related
Mortgage File.

          Upon the Custodian's receipt of a request for release (a "Request for
Release") substantially in the form of Exhibit D to the Pooling and Servicing
Agreement signed by a Servicing Officer of the related Servicer stating that it
has received payment in full of a Mortgage Loan or that payment in full will be
escrowed in a manner customary for such purposes, the Custodian agrees promptly
to release to such Servicer the related Mortgage File. The Company shall deliver
to the Custodian and the Custodian agrees to accept the Mortgage Note and other
documents constituting the Mortgage File with respect to any Substitute Mortgage
Loan.

          From time to time as is appropriate for the servicing or foreclosure
of any Mortgage Loan, including, for this purpose, collection under any Primary
Mortgage Insurance Policy, the related Servicer shall deliver to the Custodian a
Request for Release signed by a Servicing Officer requesting that possession of
all of the Mortgage File be released to such Servicer and certifying as to the
reason for such release and that such release will not invalidate any insurance
coverage provided in respect of the Mortgage Loan under any of the Insurance
Policies. Upon receipt of the foregoing, the Custodian shall deliver the
Mortgage File to such Servicer. The related Servicer shall cause each Mortgage
File or any document therein so released to be returned to the Custodian when
the need therefore by such Servicer no longer


                                      G-4

<PAGE>

exists, unless (i) the Mortgage Loan has been liquidated and the Liquidation
Proceeds relating to the Mortgage Loan have been deposited in the Master
Servicer Collection Account or the Distribution Account or (ii) the Mortgage
File or such document has been delivered to an attorney, or to a public trustee
or other public official as required by law, for purposes of initiating or
pursuing legal action or other proceedings for the foreclosure of the Mortgaged
Property either judicially or non-judicially, and the related Servicer has
delivered to the Custodian a certificate of a Servicing Officer certifying as to
the name and address of the Person to which such Mortgage File or such document
was delivered and the purpose or purposes of such delivery.

          At any time that a Servicer is required to deliver to the Custodian a
Request for Release, such Servicer shall deliver two copies of the Request for
Release if delivered in hard copy or such Servicer may furnish such Request for
Release electronically to the Custodian, in which event the Servicing Officer
transmitting the same shall be deemed to have signed the Request for Release. In
connection with any Request for Release of a Mortgage File because of a
repurchase of a Mortgage Loan, the related Servicer shall send to the Trustee an
assignment of mortgage, without recourse, representation or warranty from the
Trustee to the Mortgage Loan Seller and the related Mortgage Note which shall be
endorsed without recourse, representation or warranty by the Trustee and the
Trustee shall forward such documents to the Mortgage Loan Seller. In connection
with any Request for Release of a Mortgage File because of the payment in full
of a Mortgage Loan, the related Servicer shall send to the Trustee a certificate
of satisfaction or other similar instrument to be executed by or on behalf of
the Trustee and returned to such Servicer.

          Section 2.06 Assumption Agreements. In the event that any assumption
agreement or substitution of liability agreement is entered into with respect to
any Mortgage Loan subject to this Agreement in accordance with the terms and
provisions of the Pooling and Servicing Agreement, the Master Servicer, to the
extent provided in the related Servicing Agreement, shall cause the related
Servicer to notify the Custodian that such assumption or substitution agreement
has been completed by forwarding to the Custodian the original of such
assumption or substitution agreement, which shall be added to the related
Mortgage File and, for all purposes, shall be considered a part of such Mortgage
File to the same extent as all other documents and instruments constituting
parts thereof.

                                  ARTICLE III
                            CONCERNING THE CUSTODIAN

          Section 3.01 Custodian a Bailee and Agent of the Trustee. With respect
to each Mortgage Note, Mortgage and other documents constituting each Mortgage
File which are delivered to the Custodian, the Custodian is exclusively the
bailee and agent of the Trustee and has no instructions to hold any Mortgage
Note or Mortgage for the benefit of any person other than the Trustee and the
Certificateholders and undertakes to perform such duties and only such duties as
are specifically set forth in this Agreement. Except upon compliance with the
provisions of Section 2.5 of this Agreement, no Mortgage Note, Mortgage or
Mortgage File shall be delivered by the Custodian to the Company, the Servicer
or the Master Servicer or otherwise released from the possession of the
Custodian.


                                      G-5

<PAGE>

          Section 3.02 Reserved.

          Section 3.03 Custodian May Own Certificates. The Custodian in its
individual or any other capacity may become the owner or pledgee of Certificates
with the same rights it would have if it were not Custodian.

          Section 3.04 Master Servicer to Pay Custodian's Fees and Expenses. The
Master Servicer covenants and agrees to pay to the Custodian from time to time,
and the Custodian shall be entitled to, reasonable compensation for all services
rendered by it in the exercise and performance of any of the powers and duties
hereunder of the Custodian, and the Master Servicer will pay or reimburse the
Custodian upon its request for all reasonable expenses, disbursements and
advances incurred or made by the Custodian in accordance with any of the
provisions of this Agreement (including the reasonable compensation and the
expenses and disbursements of its counsel and of all persons not regularly in
its employ), except any such expense, disbursement or advance as may arise from
its negligence or bad faith or to the extent that such cost or expense is
indemnified by the Company pursuant to the Pooling and Servicing Agreement.

          Section 3.05 Custodian May Resign; Trustee May Remove Custodian. The
Custodian may resign from the obligations and duties hereby imposed upon it as
such obligations and duties relate to its acting as Custodian of the Mortgage
Loans. Upon receiving such notice of resignation, the Trustee shall either take
custody of the Mortgage Files itself and give prompt notice thereof to the
Company, the Master Servicer and the Custodian, or promptly appoint a successor
Custodian by written instrument, in duplicate, one copy of which instrument
shall be delivered to the resigning Custodian and one copy to the successor
Custodian. If the Trustee shall not have taken custody of the Mortgage Files and
no successor Custodian shall have been so appointed and have accepted
appointment within 30 days after the giving of such notice of resignation, the
resigning Custodian may petition any court of competent jurisdiction for the
appointment of a successor Custodian.

          The Trustee may remove the Custodian at any time with the consent of
the Master Servicer. In such event, the Trustee shall appoint, or petition a
court of competent jurisdiction to appoint, a successor Custodian hereunder. Any
successor Custodian shall be a depository institution subject to supervision or
examination by federal or state authority, shall be able to satisfy the other
requirements contained in Section 3.7 and shall be unaffiliated with the
Servicer or the Company.

          Any resignation or removal of the Custodian and appointment of a
successor Custodian pursuant to any of the provisions of this Section 3.5 shall
become effective upon acceptance of appointment by the successor Custodian. The
Trustee shall give prompt notice to the Company and the Master Servicer of the
appointment of any successor Custodian. No successor Custodian shall be
appointed by the Trustee without the prior approval of the Company and the
Master Servicer.

          Section 3.06 Merger or Consolidation of Custodian. Any Person into
which the Custodian may be merged or converted or with which it may be
consolidated, or any Person resulting from any merger, conversion or
consolidation to which the Custodian shall be a party,


                                      G-6

<PAGE>

or any Person succeeding to the business of the Custodian, shall be the
successor of the Custodian hereunder, without the execution or filing of any
paper or any further act on the part of any of the parties hereto, anything
herein to the contrary notwithstanding.

          Section 3.07 Representations of the Custodian. The Custodian hereby
represents that it is a depository institution subject to supervision or
examination by a federal or state authority, has a combined capital and surplus
of at least $15,000,000 and is qualified to do business in the jurisdictions in
which it will hold any Mortgage File.

                                   ARTICLE IV
                            MISCELLANEOUS PROVISIONS

          Section 4.01 Notices. All notices, requests, consents, demands and
other communications required under this Agreement or pursuant to any other
instrument or document delivered hereunder shall be in writing and, unless
otherwise specifically provided, may be delivered personally, by telegram or
telex, or by registered or certified mail, postage prepaid, return receipt
requested, at the addresses specified on the signature page hereof (unless
changed by the particular party whose address is stated herein by similar notice
in writing), in which case the notice will be deemed delivered when received.

          Section 4.02 Amendments. No modification or amendment of or supplement
to this Agreement shall be valid or effective unless the same is in writing and
signed by all parties hereto, and neither the Company, the Master Servicer nor
the Trustee shall enter into any amendment hereof except as permitted by the
Pooling and Servicing Agreement. The Trustee shall give prompt notice to the
Custodian of any amendment or supplement to the Pooling and Servicing Agreement
and furnish the Custodian with written copies thereof.

          Section 4.03 GOVERNING LAW. THIS AGREEMENT SHALL BE DEEMED A CONTRACT
MADE UNDER THE LAWS OF THE STATE OF NEW YORK AND SHALL BE CONSTRUED AND ENFORCED
IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.

          Section 4.04 Recordation of Agreement. To the extent permitted by
applicable law, this Agreement is subject to recordation in all appropriate
public offices for real property records in all the counties or other comparable
jurisdictions in which any or all of the properties subject to the Mortgages are
situated, and in any other appropriate public recording office or elsewhere,
such recordation to be effected by the Company and at the Trust's expense on
direction by the Trustee, but only upon direction accompanied by an Opinion of
Counsel (which shall be at the expense of the party requesting such recordation
and in no event at the expense of the Trustee) reasonably satisfactory to the
Company to the effect that the failure to effect such recordation is likely to
materially and adversely affect the interests of the Certificateholders.

          For the purpose of facilitating the recordation of this Agreement as
herein provided and for other purposes, this Agreement may be executed
simultaneously in any number of counterparts, each of which counterparts shall
be deemed to be an original, and such counterparts shall constitute but one and
the same instrument.


                                      G-7

<PAGE>

          Section 4.05 Severability of Provisions. If any one or more of the
covenants, agreements, provisions or terms of this Agreement shall be for any
reason whatsoever held invalid, then such covenants, agreements, provisions or
terms shall be deemed severable from the remaining covenants, agreements,
provisions or terms of this Agreement and shall in no way affect the validity or
enforceability of the other provisions of this Agreement or of the Certificates
or the rights of the holders thereof.


                                      G-8

<PAGE>

          IN WITNESS WHEREOF, this Agreement is executed as of the date first
above written.

Address:                                HSBC BANK USA, NATIONAL ASSOCIATION, as
                                        Trustee
452 Fifth Avenue
New York, NY 10018
                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


Address:                                MERRILL LYNCH MORTGAGE INVESTORS, INC.

4 World Financial Center
New York, NY 10281                      By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


Address:                                WELLS FARGO BANK, N.A.,
                                        as Master Servicer
9062 Old Annapolis Road
Columbia, Maryland 21045-1951
                                        By:
                                            ------------------------------------
                                        Name: Michael D. Pinzon
                                        Title: Assistant Vice President


Address:                                WELLS FARGO BANK, N.A.,
                                        as Custodian
1015 10th Avenue Southeast, MS 0031
Minneapolis, MN 55414
                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


                                      G-9

<PAGE>

                     EXHIBIT ONE TO THE CUSTODIAL AGREEMENT

                     FORM OF CUSTODIAN INITIAL CERTIFICATION
                                 March __, 2007

Merrill Lynch Mortgage Investors, Inc.
4 World Financial Center, 10th Floor
New York, New York 10281

HSBC Bank USA, National Association
452 Fifth Avenue
New York, NY 10018

     Re:  Pooling and Servicing Agreement, dated as of March 1, 2007, among
          Merrill Lynch Mortgage Investors, Inc., as depositor, Wells Fargo
          Bank, N.A., as master servicer and securities administrator, and HSBC
          Bank USA, National Association, as trustee,

          Mortgage Pass-Through Certificates, Series 2007-1

Ladies and Gentlemen:

     Attached is the Custodian's preliminary exception report delivered in
accordance with Section 2.02 of the referenced Pooling and Servicing Agreement
(the "Pooling and Servicing Agreement"). Capitalized terms used but not
otherwise defined herein shall have the meanings set forth in the Pooling and
Servicing Agreement.

     The Custodian has made no independent examination of any documents
contained in each Mortgage File beyond the review specifically required in the
Pooling and Servicing Agreement. The Custodian makes no representations as to
(i) the validity, legality, sufficiency, enforceability or genuineness of any of
the documents contained in the Mortgage File pertaining to the Mortgage Loans
identified on the Mortgage Loan Schedule, (ii) the collectability, insurability,
effectiveness or suitability of any such Mortgage Loan or (iii) the existence of
any assumption, modification, written assurance, or substitution agreement, with
respect to any Mortgage File if no such documents appear in the Mortgage File
delivered to the Custodian.

                                        WELLS FARGO BANK, N.A.,
                                        as Custodian


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


                                      G-10

<PAGE>

                     EXHIBIT TWO TO THE CUSTODIAL AGREEMENT
                      FORM OF CUSTODIAN FINAL CERTIFICATION
                               ____________, 200_

Merrill Lynch Mortgage Investors, Inc.
4 World Financial Center, 10th Floor
New York, New York 10281
Attention: ____________________

HSBC Bank USA, National Association
452 Fifth Avenue
New York, NY 10018

     Re:  Pooling and Servicing Agreement, dated as of March 1, 2007, among
          Merrill Lynch Mortgage Investors, Inc., as depositor, Wells Fargo
          Bank, N.A., as master servicer and securities administrator and HSBC
          Bank USA, National Association, as trustee,

          Mortgage Pass-Through Certificates, Series 2007-1

Ladies and Gentlemen:

     In accordance with Section 2.02 of the above-captioned Pooling and
Servicing Agreement, the undersigned, hereby certifies that, except as noted on
the Schedule of Exceptions attached hereto, for each Mortgage Loan listed on the
Mortgage Loan Schedule (other than any Mortgage Loan paid in full or listed on
the attachment hereto), it has received a complete Mortgage File which includes
the documents required to be included in the Mortgage File as set forth in the
Pooling and Servicing Agreement.

     The undersigned has made no independent examination of any documents
contained in each Mortgage File beyond the review specifically required in the
above-referenced Pooling and Servicing Agreement. The undersigned makes no
representation as to: (i) the validity, legality, sufficiency, enforceability or
genuineness of any documents contained in any Mortgage File for any of the
Mortgage Loans listed on the Mortgage Loan Schedule to the Pooling and Servicing
Agreement, (ii) the collectability, insurability, effectiveness or suitability
of any such Mortgage Loan or (iii) whether any Mortgage File should include any
flood insurance policy, any rider, addends, surety or guaranty agreement, power
of attorney, buy down agreement, assumption agreement, modification agreement,
written assurance or substitution agreement.


                                      G-11

<PAGE>

     Capitalized words and phrases used herein shall have the respective
meanings assigned to them in the above-captioned Pooling and Servicing
Agreement.

                                        WELLS FARGO BANK, N.A.,
                                        as Custodian


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------


                                      G-12
<PAGE>

                    EXHIBIT THREE TO THE CUSTODIAL AGREEMENT

      FORM OF CERTIFICATION REGARDING SERVICING CRITERIA TO BE ADDRESSED IN
                         REPORT ON ASSESSMENT COMPLIANCE

The assessment of compliance to be delivered by Wells Fargo Bank shall address,
at a minimum, the criteria identified below as "Applicable Servicing Criteria":

<TABLE>
<CAPTION>
                              SERVICING CRITERIA                                APPLICABLE
-----------------------------------------------------------------------------    SERVICING
    REFERENCE                               CRITERIA                             CRITERIA
----------------   ----------------------------------------------------------   ----------
<S>                <C>                                                          <C>
                             GENERAL SERVICING CONSIDERATIONS

1122(d)(1)(i)      Policies and procedures are instituted to monitor any
                   performance or other triggers and events of default in
                   accordance with the transaction agreements.

1122(d)(1)(ii)     If any material servicing activities are outsourced to
                   third parties, policies and procedures are instituted to
                   monitor the third party's performance and compliance with
                   such servicing activities.

1122(d)(1)(iii)    Any requirements in the transaction agreements to maintain
                   a back-up servicer for the mortgage loans are maintained.

1122(d)(1)(iv)     A fidelity bond and errors and omissions policy is in
                   effect on the party participating in the servicing
                   function throughout the reporting period in the amount of
                   coverage required by and otherwise in accordance with the
                   terms of the transaction agreements.

                            CASH COLLECTION AND ADMINISTRATION

1122(d)(2)(i)      Payments on mortgage loans are deposited into the
                   appropriate custodial bank accounts and related bank
                   clearing accounts no more than two business days following
                   receipt, or such other number of days specified in the
                   transaction agreements.

1122(d)(2)(ii)     Disbursements made via wire transfer on behalf of an
                   obligor or to an investor are made only by authorized
                   personnel.

1122(d)(2)(iii)    Advances of funds or guarantees regarding collections,
                   cash flows or distributions, and any interest or other
                   fees charged for such advances, are made, reviewed and
                   approved as specified in the transaction agreements.

1122(d)(2)(iv)     The related accounts for the transaction, such as cash
                   reserve accounts or accounts established as a form of
                   overcollateralization, are separately maintained (e.g.,
                   with respect to commingling of cash) as set forth in the
                   transaction agreements.

1122(d)(2)(v)      Each custodial account is maintained at a federally
                   insured depository institution as set forth in the
                   transaction agreements. For purposes of this criterion,
                   "federally insured depository institution" with respect to
                   a foreign financial institution means a foreign financial
                   institution that meets the requirements of Rule
                   13k-1(b)(1) of the Securities Exchange Act.

1122(d)(2)(vi)     Unissued checks are safeguarded so as to prevent
                   unauthorized access.

1122(d)(2)(vii)    Reconciliations are prepared on a monthly basis for all
                   asset-backed securities related bank accounts, including
                   custodial accounts and related bank clearing accounts.
                   These reconciliations are (A) mathematically accurate; (B)
                   prepared within 30 calendar days after the bank statement
                   cutoff date, or such other number of days specified in the
                   transaction agreements; (C) reviewed and approved by
                   someone other than the person who prepared the
                   reconciliation; and (D) contain explanations for
                   reconciling items. These reconciling items are resolved
                   within 90 calendar days of their original identification,
                   or such other number of days specified in the transaction
                   agreements.
</TABLE>


                                    G-13

<PAGE>

<TABLE>
<CAPTION>
                              SERVICING CRITERIA                                APPLICABLE
-----------------------------------------------------------------------------    SERVICING
    REFERENCE                               CRITERIA                             CRITERIA
----------------   ----------------------------------------------------------   ----------
<S>                <C>                                                          <C>
                            INVESTOR REMITTANCES AND REPORTING

1122(d)(3)(i)      Reports to investors, including those to be filed with the
                   Commission, are maintained in accordance with the
                   transaction agreements and applicable Commission
                   requirements. Specifically, such reports (A) are prepared
                   in accordance with timeframes and other terms set forth in
                   the transaction agreements; (B) provide information
                   calculated in accordance with the terms specified in the
                   transaction agreements; (C) are filed with the Commission
                   as required by its rules and regulations; and (D) agree
                   with investors' or the trustee's records as to the total
                   unpaid principal balance and number of mortgage loans
                   serviced by the Servicer.

1122(d)(3)(ii)     Amounts due to investors are allocated and remitted in
                   accordance with timeframes, distribution priority and
                   other terms set forth in the transaction agreements.

1122(d)(3)(iii)    Disbursements made to an investor are posted within two
                   business days to the Servicer's investor records, or such
                   other number of days specified in the transaction
                   agreements.

1122(d)(3)(iv)     Amounts remitted to investors per the investor reports
                   agree with cancelled checks, or other form of payment, or
                   custodial bank statements.

                                 POOL ASSET ADMINISTRATION

1122(d)(4)(i)      Collateral or security on mortgage loans is maintained as         X
                   required by the transaction agreements or related mortgage
                   loan documents.

1122(d)(4)(ii)     Mortgage loan and related documents are safeguarded as            X
                   required by the transaction agreements.

1122(d)(4)(iii)    Any additions, removals or substitutions to the asset pool
                   are made, reviewed and approved in accordance with any
                   conditions or requirements in the transaction agreements.

1122(d)(4)(iv)     Payments on mortgage loans, including any payoffs, made in
                   accordance with the related mortgage loan documents are
                   posted to the Servicer's obligor records maintained no
                   more than two business days after receipt, or such other
                   number of days specified in the transaction agreements,
                   and allocated to principal, interest or other items (e.g.,
                   escrow) in accordance with the related mortgage loan
                   documents.

1122(d)(4)(v)      The Servicer's records regarding the mortgage loans agree
                   with the Servicer's records with respect to an obligor's
                   unpaid principal balance.

1122(d)(4)(vi)     Changes with respect to the terms or status of an
                   obligor's mortgage loans (e.g., loan modifications or
                   re-agings) are made, reviewed and approved by authorized
                   personnel in accordance with the transaction agreements
                   and related pool asset documents.

1122(d)(4)(vii)    Loss mitigation or recovery actions (e.g., forbearance
                   plans, modifications and deeds in lieu of foreclosure,
                   foreclosures and repossessions, as applicable) are
                   initiated, conducted and concluded in accordance with the
                   timeframes or other requirements established by the
                   transaction agreements.

1122(d)(4)(viii)   Records documenting collection efforts are maintained
                   during the period a mortgage loan is delinquent in
                   accordance with the transaction agreements. Such records
                   are maintained on at least a monthly basis, or such other
                   period specified in the transaction agreements, and
                   describe the entity's activities in monitoring delinquent
                   mortgage loans including, for example, phone calls,
                   letters and payment rescheduling plans in cases where
                   delinquency is deemed temporary (e.g., illness or
                   unemployment).

1122(d)(4)(ix)     Adjustments to interest rates or rates of return for
                   mortgage loans with variable rates are computed based on
                   the related mortgage loan documents.
</TABLE>


                                    G-14

<PAGE>

<TABLE>
<CAPTION>
                              SERVICING CRITERIA                                APPLICABLE
-----------------------------------------------------------------------------    SERVICING
    REFERENCE                               CRITERIA                             CRITERIA
----------------   ----------------------------------------------------------   ----------
<S>                <C>                                                          <C>
1122(d)(4)(x)      Regarding any funds held in trust for an obligor (such as
                   escrow accounts): (A) such funds are analyzed, in
                   accordance with the obligor's mortgage loan documents, on
                   at least an annual basis, or such other period specified
                   in the transaction agreements; (B) interest on such funds
                   is paid, or credited, to obligors in accordance with
                   applicable mortgage loan documents and state laws; and (C)
                   such funds are returned to the obligor within 30 calendar
                   days of full repayment of the related mortgage loans, or
                   such other number of days specified in the transaction
                   agreements.

1122(d)(4)(xi)     Payments made on behalf of an obligor (such as tax or
                   insurance payments) are made on or before the related
                   penalty or expiration dates, as indicated on the
                   appropriate bills or notices for such payments, provided
                   that such support has been received by the servicer at
                   least 30 calendar days prior to these dates, or such other
                   number of days specified in the transaction agreements.

1122(d)(4)(xii)    Any late payment penalties in connection with any payment
                   to be made on behalf of an obligor are paid from the
                   servicer's funds and not charged to the obligor, unless
                   the late payment was due to the obligor's error or
                   omission.

1122(d)(4)(xiii)   Disbursements made on behalf of an obligor are posted
                   within two business days to the obligor's records
                   maintained by the servicer, or such other number of days
                   specified in the transaction agreements.

1122(d)(4)(xiv)    Delinquencies, charge-offs and uncollectible accounts are
                   recognized and recorded in accordance with the transaction
                   agreements.

1122(d)(4)(xv)     Any external enhancement or other support, identified in
                   Item 1114(a)(1) through (3) or Item 1115 of Regulation AB,
                   is maintained as set forth in the transaction agreements.
</TABLE>


                                    G-15
<PAGE>

                                    EXHIBIT H

                                   [RESERVED]


                                      H-1-1

<PAGE>

                                   EXHIBIT I-1
                ASSIGNMENT, ASSUMPTION AND RECOGNITION AGREEMENT
                              INDYMAC BANK, F.S.B.
                             (PROVIDED UPON REQUEST)


                                      I-1-1
<PAGE>

                                   EXHIBIT I-2
                ASSIGNMENT, ASSUMPTION AND RECOGNITION AGREEMENT
                            PHH MORTGAGE CORPORATION
                             (PROVIDED UPON REQUEST)


                                      I-2-1

<PAGE>

                                   EXHIBIT I-3
                ASSIGNMENT, ASSUMPTION AND RECOGNITION AGREEMENT
                             WELLS FARGO BANK, N.A.
                             (PROVIDED UPON REQUEST)


                                      I-3-1

<PAGE>

                                   EXHIBIT I-4
                ASSIGNMENT, ASSUMPTION AND RECOGNITION AGREEMENT
                          ABN AMRO MORTGAGE GROUP, INC.
                             (PROVIDED UPON REQUEST)


                                      I-4-1

<PAGE>

                                   EXHIBIT I-5
                ASSIGNMENT, ASSUMPTION AND RECOGNITION AGREEMENT
                             WASHINGTON MUTUAL BANK
                             (PROVIDED UPON REQUEST)


                                      I-5-1

<PAGE>

                                   EXHIBIT I-6
                ASSIGNMENT, ASSUMPTION AND RECOGNITION AGREEMENT
                       COUNTRYWIDE HOME LOANS SERVICING LP
                             (PROVIDED UPON REQUEST)


                                      I-6-1

<PAGE>

                                   EXHIBIT I-7
                ASSIGNMENT, ASSUMPTION AND RECOGNITION AGREEMENT
                           NATIONAL CITY MORTGAGE CO.
                             (PROVIDED UPON REQUEST)


                                      I-7-1
<PAGE>

                                    EXHIBIT J
                    FORM OF MORTGAGE LOAN PURCHASE AGREEMENT





                       See Exhibit 99.1 of the Form 8-K




                                       J-1

<PAGE>

                                    EXHIBIT K

                       SERVICING CRITERIA TO BE ADDRESSED
                           IN ASSESSMENT OF COMPLIANCE
                          (RMBS UNLESS OTHERWISE NOTED)

KEY: X - obligation

WHERE THERE ARE MULTIPLE CHECKS FOR CRITERIA THE ATTESTING PARTY WILL IDENTIFY
IN ITS MANAGEMENT ASSERTION THAT IT IS ATTESTING ONLY TO THE PORTION OF THE
DISTRIBUTION CHAIN IT IS RESPONSIBLE FOR IN THE RELATED TRANSACTION AGREEMENTS.
CAPITALIZED TERMS USED HEREIN BUT NOT DEFINED HEREIN SHALL HAVE THE MEANINGS
ASSIGNED TO THEM IN THE POOLING AND SERVICING AGREEMENT, DATED AS OF MARCH 1,
2007, AMONG MERRILL LYNCH MORTGAGE INVESTORS, INC., AS DEPOSITOR, WELLS FARGO
BANK, N.A., AS MASTER SERVICER AND SECURITIES ADMINISTRATOR, AND HSBC BANK USA,
NATIONAL ASSOCIATION, AS TRUSTEE.

<TABLE>
<CAPTION>
                                                                   SECURITIES      MASTER
REG AB REFERENCE                SERVICING CRITERIA                ADMINISTRATOR   SERVICER
----------------   --------------------------------------------   -------------   --------
<S>                <C>                                            <C>             <C>
                   GENERAL SERVICING CONSIDERATIONS

1122(d)(1)(i)      Policies and procedures are instituted to            X             X
                   monitor any performance or other triggers
                   and events of default in accordance with the
                   transaction agreements.

1122(d)(1)(ii)     If any material servicing activities are             X             X
                   outsourced to third parties, policies and
                   procedures are instituted to monitor the
                   third party's performance and compliance
                   with such servicing activities.

1122(d)(1)(iii)    Any requirements in the transaction                 N/A           N/A
                   agreements to maintain a back-up servicer
                   for the Pool Assets are maintained.

1122(d)(1)(iv)     A fidelity bond and errors and omissions                           X
                   policy is in effect on the party
                   participating in the servicing function
                   throughout the reporting period in the
                   amount of coverage required by and otherwise
                   in accordance with the terms of the
                   transaction agreements.

                   CASH COLLECTION AND ADMINISTRATION

1122(d)(2)(i)      Payments on pool assets are deposited into           X             X
                   the appropriate custodial bank accounts and
                   related bank clearing accounts no more than
                   two business days following receipt, or such
                   other number of days specified in the
                   transaction agreements.

1122(d)(2)(ii)     Disbursements made via wire transfer on              X             X
                   behalf of an obligor or to an investor are
                   made only by authorized personnel.

1122(d)(2)(iii)    Advances of funds or guarantees regarding                          X
                   collections, cash flows or distributions,
                   and any interest or other fees charged for
                   such advances, are made, reviewed and
                   approved as specified in the transaction
                   agreements.

1122(d)(2)(iv)     The related accounts for the transaction,            X             X
                   such as cash reserve accounts or accounts
                   established as a form of over
                   collateralization, are separately maintained
                   (e.g., with respect to commingling of cash)
                   as set forth in the transaction agreements.
</TABLE>


                                       K-1

<PAGE>

<TABLE>
<CAPTION>
                                                                   SECURITIES      MASTER
REG AB REFERENCE                SERVICING CRITERIA                ADMINISTRATOR   SERVICER
----------------   --------------------------------------------   -------------   --------
<S>                <C>                                            <C>             <C>
1122(d)(2)(v)      Each custodial account is maintained at a            X             X
                   federally insured depository institution as
                   set forth in the transaction agreements. For
                   purposes of this criterion, "federally
                   insured depository institution" with respect
                   to a foreign financial institution means a
                   foreign financial institution that meets the
                   requirements of Rule 13k-1(b)(1) of the
                   Securities Exchange Act.

1122(d)(2)(vi)     Unissued checks are safeguarded so as to
                   prevent unauthorized access.

1122(d)(2)(vii)    Reconciliations are prepared on a monthly            X             X
                   basis for all asset-backed securities
                   related bank accounts, including custodial
                   accounts and related bank clearing accounts.
                   These reconciliations are (A) mathematically
                   accurate; (B) prepared within 30 calendar
                   days after the bank statement cutoff date,
                   or such other number of days specified in
                   the transaction agreements; (C) reviewed and
                   approved by someone other than the person
                   who prepared the reconciliation; and (D)
                   contain explanations for reconciling items.
                   These reconciling items are resolved within
                   90 calendar days of their original
                   identification, or such other number of days
                   specified in the transaction agreements.

                   INVESTOR REMITTANCES AND REPORTING

1122(d)(3)(i)      Reports to investors, including those to be          X             X
                   filed with the Commission, are maintained in
                   accordance with the transaction agreements
                   and applicable Commission requirements.
                   Specifically, such reports (A) are prepared
                   in accordance with timeframes and other
                   terms set forth in the transaction
                   agreements; (B) provide information
                   calculated in accordance with the terms
                   specified in the transaction agreements; (C)
                   are filed with the Commission as required by
                   its rules and regulations; and (D) agree
                   with investors' or the trustee's records as
                   to the total unpaid principal balance and
                   number of Pool Assets serviced by the
                   Servicer.

1122(d)(3)(ii)     Amounts due to investors are allocated and           X             X
                   remitted in accordance with timeframes,
                   distribution priority and other terms set
                   forth in the transaction agreements.

1122(d)(3)(iii)    Disbursements made to an investor are posted         X             X
                   within two business days to the Servicer's
                   investor records, or such other number of
                   days specified in the transaction
                   agreements.

1122(d)(3)(iv)     Amounts remitted to investors per the                X             X
                   investor reports agree with cancelled
                   checks, or other form of payment, or
                   custodial bank statements.

                   POOL ASSET ADMINISTRATION

1122(d)(4)(i)      Collateral or security on pool assets is
                   maintained as required by the transaction
                   agreements or related pool asset documents.

1122(d)(4)(ii)     Pool assets and related documents are
                   safeguarded as required by the transaction
                   agreements

1122(d)(4)(iii)    Any additions, removals or substitutions to
                   the asset pool are made, reviewed and
                   approved in accordance with any conditions
                   or requirements in the transaction
                   agreements.
</TABLE>


                                       K-2

<PAGE>

<TABLE>
<CAPTION>
                                                                   SECURITIES      MASTER
REG AB REFERENCE                SERVICING CRITERIA                ADMINISTRATOR   SERVICER
----------------   --------------------------------------------   -------------   --------
<S>                <C>                                            <C>             <C>
1122(d)(4)(iv)     Payments on pool assets, including any
                   payoffs, made in accordance with the related
                   pool asset documents are posted to the
                   Servicer's obligor records maintained no
                   more than two business days after receipt,
                   or such other number of days specified in
                   the transaction agreements, and allocated to
                   principal, interest or other items (e.g.,
                   escrow) in accordance with the related pool
                   asset documents.

1122(d)(4)(v)      The Servicer's records regarding the pool
                   assets agree with the Servicer's records
                   with respect to an obligor's unpaid
                   principal balance.

1122(d)(4)(vi)     Changes with respect to the terms or status
                   of an obligor's pool assets (e.g., loan
                   modifications or re-agings) are made,
                   reviewed and approved by authorized
                   personnel in accordance with the transaction
                   agreements and related pool asset documents.

1122(d)(4)(vii)    Loss mitigation or recovery actions (e.g.,
                   forbearance plans, modifications and deeds
                   in lieu of foreclosure, foreclosures and
                   repossessions, as applicable) are initiated,
                   conducted and concluded in accordance with
                   the timeframes or other requirements
                   established by the transaction agreements.

1122(d)(4)(viii)   Records documenting collection efforts are
                   maintained during the period a pool asset is
                   delinquent in accordance with the
                   transaction agreements. Such records are
                   maintained on at least a monthly basis, or
                   such other period specified in the
                   transaction agreements, and describe the
                   entity's activities in monitoring delinquent
                   pool assets including, for example, phone
                   calls, letters and payment rescheduling
                   plans in cases where delinquency is deemed
                   temporary (e.g., illness or unemployment).

1122(d)(4)(ix)     Adjustments to interest rates or rates of
                   return for pool assets with variable rates
                   are computed based on the related pool asset
                   documents.

1122(d)(4)(x)      Regarding any funds held in trust for an
                   obligor (such as escrow accounts): (A) such
                   funds are analyzed, in accordance with the
                   obligor's pool asset documents, on at least
                   an annual basis, or such other period
                   specified in the transaction agreements; (B)
                   interest on such funds is paid, or credited,
                   to obligors in accordance with applicable
                   pool asset documents and state laws; and (C)
                   such funds are returned to the obligor
                   within 30 calendar days of full repayment of
                   the related pool assets, or such other
                   number of days specified in the transaction
                   agreements.

1122(d)(4)(xi)     Payments made on behalf of an obligor (such
                   as tax or insurance payments) are made on or
                   before the related penalty or expiration
                   dates, as indicated on the appropriate bills
                   or notices for such payments, provided that
                   such support has been received by the
                   servicer at least 30 calendar days prior to
                   these dates, or such other number of days
                   specified in the transaction agreements.

1122(d)(4)(xii)    Any late payment penalties in connection
                   with any payment to be made on behalf of an
                   obligor are paid from the Servicer's funds
                   and not charged to the obligor, unless the
                   late payment was due to the obligor's error
                   or omission.
</TABLE>


                                       K-3

<PAGE>

<TABLE>
<CAPTION>
                                                                   SECURITIES      MASTER
REG AB REFERENCE                SERVICING CRITERIA                ADMINISTRATOR   SERVICER
----------------   --------------------------------------------   -------------   --------
<S>                <C>                                            <C>             <C>
1122(d)(4)(xiii)   Disbursements made on behalf of an obligor
                   are posted within two business days to the
                   obligor's records maintained by the
                   servicer, or such other number of days
                   specified in the transaction agreements.

1122(d)(4)(xiv)    Delinquencies, charge-offs and uncollectible                       X
                   accounts are recognized and recorded in
                   accordance with the transaction agreements.

1122(d)(4)(xv)     Any external enhancement or other support,
                   identified in Item 1114(a)(1) through (3) or
                   Item 1115 of Regulation AB, is maintained as
                   set forth in the transaction agreements.
</TABLE>


                                       K-4

<PAGE>

                                    EXHIBIT L

                          SARBANES-OXLEY CERTIFICATION

                                     [DATE]

Merrill Lynch Mortgage Investors, Inc.
250 Vesey Street
4 World Financial Center, 10th Floor
New York, New York 10080

Wells Fargo Bank, N.A.
9062 Old Annapolis Road
Columbia, MD 21045

Re:  Merrill Lynch Mortgage Backed Securities Trust, Series 2007-1

I, [identify the certifying individual], certify that:

1. I have reviewed the report on Form 10-K and all reports on Form 10-D required
to be filed in respect of the period covered by this report on Form 10-K of
Merrill Lynch Mortgage Backed Securities Trust, Series 2007-1 (the "Exchange Act
periodic reports");

2. Based on my knowledge, the Exchange Act periodic reports, taken as a whole,
do not contain any untrue statement of a material fact or omit to state a
material fact necessary to make the statements made, in light of the
circumstances under which such statements were made, not misleading with respect
to the period covered by this report;

3. Based on my knowledge, all of the distribution, servicing and other
information required to be provided under Form 10-D for the period covered by
this report is included in the Exchange Act periodic reports;

4. [I am responsible for reviewing the activities performed by the servicer(s)
and based on my knowledge and the compliance review(s) conducted in preparing
the servicer compliance statement(s) required in this report under Item 1123 of
Regulation AB, and except as disclosed in the Exchange Act periodic reports, the
servicer(s) [has/have] fulfilled [its/their] obligations under the servicing
agreement(s) in all material respects; and]

5. All of the reports on assessment of compliance with servicing criteria for
ABS and their related attestation reports on assessment of compliance with
servicing criteria for asset-backed securities required to be included in this
report in accordance with Item 1122 of Regulation AB and Exchange Act Rules
13a-18 and 15d-18 have been included as an exhibit to this report, except as
otherwise disclosed in this report. Any material instances of noncompliance
described in such reports have been disclosed in this report on Form 10-K.


                                       L-1

<PAGE>

[In giving the certifications above, I have reasonably relied on information
provided to me by the following unaffiliated parties [name of servicer,
sub-servicer, co-servicer, depositor or trustee].]

Date:
      -------------------------------


                                        ----------------------------------------
                                        [Signature]
                                        [Title]


                                       L-2
<PAGE>

                                    EXHIBIT M

                  FORM OF BACK-UP SARBANES-OXLEY CERTIFICATION

Merrill Lynch Mortgage Investors, Inc.
250 Vesey Street
4 World Financial Center, 10th Floor
New York, New York 10080

Wells Fargo Bank, N.A.
9062 Old Annapolis Road
Columbia, MD 21045

Re:  Merrill Lynch Mortgage Backed Securities Trust, Series 2007-1

[_______], the [_______] of [_______] (the "Company") hereby certifies to the
Depositor, the Master Servicer and the Securities Administrator, and each of
their officers, directors and affiliates that:

(1) I have reviewed [the servicer compliance statement of the Company provided
in accordance with Item 1123 of Regulation AB (the "Compliance Statement"),] the
report on assessment of the Company's compliance with the Servicing Criteria set
forth in Item 1122(d) of Regulation AB (the "Servicing Criteria"), provided in
accordance with Rules 13a-18 and 15d-18 under the Securities Exchange Act of
1934, as amended (the "Exchange Act") and Item 1122 of Regulation AB (the
"Servicing Assessment"), the registered public accounting firm's attestation
report provided in accordance with Rules 13a-18 and 15d-18 under the Exchange
Act and Section 1122(b) of Regulation AB (the "Attestation Report"), and all
servicing reports, officer's certificates and other information relating to the
servicing of the Mortgage Loans by the Company during 200[_] that were delivered
by the Company to any of the Depositor, the Master Servicer and the Trustee
pursuant to the Agreement (collectively, the "Company Servicing Information");

(2) Based on my knowledge, the Company Servicing Information, taken as a whole,
does not contain any untrue statement of a material fact or omit to state a
material fact necessary to make the statements made, in the light of the
circumstances under which such statements were made, not misleading with respect
to the period of time covered by the Company Servicing Information;

(3) Based on my knowledge, all of the Company Servicing Information required to
be provided by the Company under the Agreement has been provided to the
Depositor, the Master Servicer and the Securities Administrator;

(4) I am responsible for reviewing the activities performed by [_______] as
[_______] under the [_______] (the "Agreement"), and based on my knowledge [and
the compliance review conducted in preparing the Compliance Statement] and
except as disclosed in [the Compliance Statement,] the Servicing Assessment or
the Attestation Report, the Company has fulfilled its obligations under the
Agreement in all material respects; and


                                       M-1

<PAGE>

(5) [The Compliance Statement required to be delivered by the Company pursuant
to the Agreement, and] [The] [the] Servicing Assessment and Attestation Report
required to be provided by the Company and [by any Subservicer or Subcontractor]
pursuant to the Agreement, have been provided to the Depositor, the Master
Servicer and the Securities Administrator. Any material instances of
noncompliance described in such reports have been disclosed to the Depositor,
the Master Servicer and the Securities Administrator. Any material instance of
noncompliance with the Servicing Criteria has been disclosed in such reports.

Capitalized terms used but not defined herein have the meanings ascribed to them
in the Pooling and Servicing Agreement, dated as of March 1, 2007, among Merrill
Lynch Mortgage Investors, Inc., as depositor (the "Depositor"), Wells Fargo
Bank, N.A., as master servicer (in such capacity, the "Master Servicer") and
securities administrator (in such capacity, the "Securities Administrator") and
HSBC Bank USA, National Association, as trustee (the "Trustee").

                                        [               ]
                                         ---------------
                                        as [               ]
                                            ---------------


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------
                                        Date:
                                              ---------------------------


                                       M-2
<PAGE>

                                    EXHIBIT N

                                   [RESERVED]


                                       N-1
<PAGE>

                                    EXHIBIT O

                       ADDITIONAL DISCLOSURE NOTIFICATION

Merrill Lynch Mortgage Investors, Inc.
250 Vesey Street
4 World Financial Center, 10th Floor
New York, New York 10080

Wells Fargo Bank, N.A.
9062 Old Annapolis Road
Columbia, MD 21045

RE:  Merrill Lynch Mortgage Backed Securities Trust, Series 2007-1
     **Additional Form [10-D][10-K][8-K] Disclosure** Required

Ladies and Gentlemen:

In accordance with Section 3.18(b) of the Pooling and Servicing Agreement, dated
as of March 1, 2007, among Merrill Lynch Mortgage Investors, Inc., as depositor,
Wells Fargo Bank, N.A., as master servicer and securities administrator and HSBC
Bank USA, National Association, as trustee, the undersigned, as [__], hereby
notifies you that certain events have come to our attention that [will] [may]
need to be disclosed on Form [10-D][10-K][8-K].

Description of Additional Form [10-D][10-K][8-K] Disclosure:____________________

List of any Attachments hereto to be included in the Additional Form
[10-D][10-K][8-K] Disclosure:___________________________________________________

     Any inquiries related to this notification should be directed to [_______],
phone number: [______]; email address: [_______].

                                        [NAME OF PARTY],
                                        as [role]


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


                                       O-1
<PAGE>

                                    EXHIBIT P

                   FORM OF ITEM 1123 CERTIFICATION OF SERVICER

                                     [DATE]

Merrill Lynch Mortgage Investors, Inc.
250 Vesey Street
4 World Financial Center, 10th Floor
New York, New York 10080

Wells Fargo Bank, N.A.
9062 Old Annapolis Road
Columbia, MD 21045

Re:  Merrill Lynch Mortgage Backed Securities Trust, Series 2007-1 Mortgage
     Pass-Through Certificates

I, [identify name of certifying individual], [title of certifying individual] of
[name of servicing company] (the "Servicer"), hereby certify that:

(1) A review of the activities of the Servicer during the preceding calendar
year and of the performance of the Servicer under the [related servicing
agreement] (the "Servicing Agreement") has been made under my supervision; and

(2) To the best of my knowledge, based on such review, the Servicer has
fulfilled all its obligations under the related Servicing Agreement in all
material respects throughout such year or a portion thereof[, or, if there has
been a failure to fulfill any such obligation in any material respect, I have
specified below each such failure known to me and the nature and status
thereof].

Date:
     --------

                                        [Servicer]


                                        By:
                                            ------------------------------------
                                        Name:
                                              ----------------------------------
                                        Title:
                                               ---------------------------------


                                       P-1
<PAGE>

                                   EXHIBIT Q-1

                         ADDITIONAL FORM 10-D DISCLOSURE

<TABLE>
<CAPTION>
                         ADDITIONAL FORM 10-D DISCLOSURE
--------------------------------------------------------------------------------
          ITEM ON FORM 10-D                         PARTY RESPONSIBLE
          -----------------                         -----------------
<S>                                     <C>
    ITEM 1: DISTRIBUTION AND POOL
       PERFORMANCE INFORMATION

     Information included in the                     Master Servicer
         [Monthly Statement]                            Servicer
                                                Securities Administrator

   Any information required by 1121                     Depositor
     which is NOT included on the
         [Monthly Statement]

      ITEM 2: LEGAL PROCEEDINGS

Any legal proceeding pending against
the following entities or their
respective property, that is material
to Certificateholders, including any
proceeding known to be contemplated
by governmental authorities:

-    Issuing Entity (Trust Fund)          Trustee, Master Servicer, Securities
                                               Administrator and Depositor

-    Sponsor (Seller)                     Seller (if a party to the Pooling and
                                            Servicing Agreement) or Depositor

-    Depositor                                          Depositor

-    Trustee                                             Trustee

-    Securities Administrator                   Securities Administrator

-    Master Servicer                                 Master Servicer

-    Custodian                                          Custodian

-    1110(b) Originator                                 Depositor

-    Any 1108(a)(2) Servicer (other                     Servicer
     than the Master Servicer or
     Securities Administrator)

-    Any other party contemplated by                    Depositor
     1100(d)(1)

ITEM 3: SALE OF SECURITIES AND USE OF                   Depositor
               PROCEEDS

Information from Item 2(a) of Part II
of Form 10-Q:

With respect to any sale of
securities by the sponsor, depositor
or issuing entity, that are backed by
the same asset pool or are otherwise
issued by the issuing entity, whether
or not registered, provide the sales
and use of proceeds information in
Item 701 of Regulation S-K. Pricing
information can be omitted if
securities were not registered.
</TABLE>


                                      Q-1-1

<PAGE>

<TABLE>
<CAPTION>
                         ADDITIONAL FORM 10-D DISCLOSURE
--------------------------------------------------------------------------------
          ITEM ON FORM 10-D                         PARTY RESPONSIBLE
          -----------------                         -----------------
<S>                                     <C>
     ITEM 4: DEFAULTS UPON SENIOR               Securities Administrator
              SECURITIES                                 Trustee

Information from Item 3 of Part II of
Form 10-Q:

Report the occurrence of any Event of
Default (after expiration of any
grace period and provision of any
required notice)

  ITEM 5: SUBMISSION OF MATTERS TO A            Securities Administrator
       VOTE OF SECURITY HOLDERS                          Trustee

Information from Item 4 of Part II of
Form 10-Q

ITEM 6: SIGNIFICANT OBLIGORS OF POOL                    Depositor
                ASSETS

Item 1112(b) - Significant Obligor
Financial Information*

*    This information need only be
     reported on the Form 10-D for
     the distribution period in which
     updated information is required
     pursuant to the Item.

   ITEM 7: SIGNIFICANT ENHANCEMENT
         PROVIDER INFORMATION

Item 1114(b)(2) - Credit Enhancement
Provider Financial Information*

-    Determining applicable                             Depositor
     disclosure threshold

-    Requesting required financial                      Depositor
     information (including any
     required accountants' consent to
     the use thereof) or effecting
     incorporation by reference

      Item 1115(b) - Derivative
 Counterparty Financial Information*

-    Determining current maximum                        Depositor
     probable exposure

-    Determining current significance                   Depositor
     percentage

-    Requesting required financial                      Depositor
     information (including any
     required accountants' consent to
     the use thereof) or effecting
     incorporation by reference

*    This information need only be
     reported on the Form 10-D for
     the distribution period in which
     updated information is required
     pursuant to the Items.
</TABLE>


                                        2

<PAGE>

<TABLE>
<CAPTION>
                         ADDITIONAL FORM 10-D DISCLOSURE
--------------------------------------------------------------------------------
          ITEM ON FORM 10-D                         PARTY RESPONSIBLE
          -----------------                         -----------------
<S>                                     <C>
      ITEM 8: OTHER INFORMATION         Any party responsible for the applicable
                                                Form 8-K Disclosure item

Disclose any information required to
be reported on Form 8-K during the
period covered by the Form 10-D but
not reported

           ITEM 9: EXHIBITS

         Monthly Statement to                   Securities Administrator
          Certificateholders

   Exhibits required by Item 601 of                       Depositor
   Regulation S-K, such as material
              agreements
</TABLE>


                                        3
<PAGE>

                                   EXHIBIT Q-2

                         ADDITIONAL FORM 10-K DISCLOSURE

<TABLE>
<CAPTION>
                                     ADDITIONAL FORM 10-K DISCLOSURE
---------------------------------------------------------------------------------------------------------
                    ITEM ON FORM 10-K                                     PARTY RESPONSIBLE
                    -----------------                       ---------------------------------------------
<S>                                                         <C>
           ITEM 1B: UNRESOLVED STAFF COMMENTS                                 Depositor
               ITEM 9B: OTHER INFORMATION                   Any party responsible for disclosure items on
Disclose any information  required to be reported on Form                      Form 8-K
8-K during the fourth quarter covered by the Form 10-K
but not reported

    ITEM 15: EXHIBITS, FINANCIAL STATEMENT SCHEDULES               Securities Administrator Depositor

REG AB ITEM 1112(B): SIGNIFICANT OBLIGORS OF POOL ASSETS

Significant Obligor Financial Information*                                    Depositor

*    This information need only be reported on the Form
     10-K if updated information is required pursuant to
     the Item.

   REG AB ITEM 1114(B)(2): CREDIT ENHANCEMENT PROVIDER
                  FINANCIAL INFORMATION

-    Determining applicable disclosure threshold                              Depositor

-    Requesting required financial information (including                     Depositor
     any required accountants' consent to the use
     thereof) or effecting incorporation by reference

*    This information need only be reported on the Form
     10-K if updated information is required pursuant to
     the Item.

 REG AB ITEM 1115(B): DERIVATIVE COUNTERPARTY FINANCIAL
                       INFORMATION

-    Determining current maximum probable exposure                            Depositor

-    Determining current significance percentage                              Depositor

-    Requesting required financial information (including                     Depositor
     any required accountants' consent to the use
     thereof) or effecting incorporation by reference

*    This information need only be reported on the Form
     10-K if updated information is required pursuant to
     the Item.

           REG AB ITEM 1117: LEGAL PROCEEDINGS

Any legal proceeding pending against the following
entities or their respective property, that is material
to Certificateholders, including any proceeding known to
be contemplated by
</TABLE>


1

<PAGE>

<TABLE>
<CAPTION>
                                     ADDITIONAL FORM 10-K DISCLOSURE
---------------------------------------------------------------------------------------------------------
                    ITEM ON FORM 10-K                                     PARTY RESPONSIBLE
                    -----------------                       ---------------------------------------------
<S>                                                         <C>
governmental authorities:

-    Issuing Entity (Trust Fund)                                 Trustee, Master Servicer, Securities
                                                                     Administrator and Depositor

-    Sponsor (Seller)                                           Seller (if a party to the Pooling and
                                                                  Servicing Agreement) or Depositor

-    Depositor                                                                Depositor

-    Trustee                                                                   Trustee

-    Securities Administrator                                          Securities Administrator

-    Master Servicer                                                       Master Servicer

-    Custodian                                                                Custodian

-    1110(b) Originator                                                       Depositor

-    Any 1108(a)(2) Servicer (other than the Master                            Servicer
     Servicer or Securities Administrator)

-    Any other party contemplated by 1100(d)(1)                               Depositor

    REG AB ITEM 1119: AFFILIATIONS AND RELATIONSHIPS

Whether (a) the Sponsor (Seller), Depositor or Issuing                   Depositor as to (a)
Entity is an affiliate of the following parties, and (b)               Sponsor/Seller as to (a)
to the extent known and material, any of the following
parties are affiliated with one another:

-    Master Servicer                                                       Master Servicer

-    Securities Administrator                                          Securities Administrator

-    Trustee                                                                   Trustee

-    Any other 1108(a)(3) servicer                                             Servicer

-    Any 1110 Originator                                                  Depositor/Sponsor

-    Any 1112(b) Significant Obligor                                      Depositor/Sponsor

-    Any 1114 Credit Enhancement Provider                                 Depositor/Sponsor

-    Any 1115 Derivate Counterparty Provider                              Depositor/Sponsor

-    Any other 1101(d)(1) material party                                  Depositor/Sponsor

Whether there are any "outside the ordinary course                       Depositor as to (a)
business arrangements" other than would be obtained in an              Sponsor/Seller as to (a)
arm's length transaction between (a) the Sponsor
(Seller), Depositor or Issuing Entity on the one hand,
and (b) any of the following parties (or their
affiliates) on the other hand, that exist currently or
within the past two years and that are material to a
Certificateholder's understanding of the Certificates:

-    Master Servicer                                                       Master Servicer

-    Securities Administrator                                          Securities Administrator

-    Trustee                                                                  Depositor

-    Any other 1108(a)(3) servicer                                             Servicer

-    Any 1110 Originator                                                  Depositor/Sponsor

-    Any 1112(b) Significant Obligor                                      Depositor/Sponsor

-    Any 1114 Credit Enhancement Provider                                 Depositor/Sponsor
</TABLE>


2

<PAGE>

<TABLE>
<CAPTION>
                                     ADDITIONAL FORM 10-K DISCLOSURE
---------------------------------------------------------------------------------------------------------
                    ITEM ON FORM 10-K                                     PARTY RESPONSIBLE
                    -----------------                       ---------------------------------------------
<S>                                                         <C>
-    Any 1115 Derivate Counterparty Provider                              Depositor/Sponsor

-    Any other 1101(d)(1) material party                                  Depositor/Sponsor

Whether there are any specific relationships involving                   Depositor as to (a)
the transaction or the pool assets between (a) the                     Sponsor/Seller as to (a)
Sponsor (Seller), Depositor or Issuing Entity on the one
hand, and (b) any of the following parties (or their
affiliates) on the other hand, that exist currently or
within the past two years and that are material:

-    Master Servicer                                                       Master Servicer

-    Securities Administrator                                          Securities Administrator

-    Trustee                                                                  Depositor

-    Any other 1108(a)(3) servicer                                             Servicer

-    Any 1110 Originator                                                  Depositor/Sponsor

-    Any 1112(b) Significant Obligor                                      Depositor/Sponsor

-    Any 1114 Credit Enhancement Provider                                 Depositor/Sponsor

-    Any 1115 Derivate Counterparty Provider                              Depositor/Sponsor

-    Any other 1101(d)(1) material party                                  Depositor/Sponsor
</TABLE>


3
<PAGE>

                                   EXHIBIT Q-3

                         FORM 8-K DISCLOSURE INFORMATION

<TABLE>
<CAPTION>
                                     FORM 8-K DISCLOSURE INFORMATION
---------------------------------------------------------------------------------------------------------
                     ITEM ON FORM 8-K                                     PARTY RESPONSIBLE
                     ----------------                                     -----------------
<S>                                                         <C>
  ITEM 1.01- ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT                      All parties

Disclosure is required regarding entry into or amendment
of any definitive agreement that is material to the
securitization, even if depositor is not a party.

Examples: servicing agreement, custodial agreement.

Note: disclosure not required as to definitive agreements
that are fully disclosed in the prospectus

ITEM 1.02- TERMINATION OF A MATERIAL DEFINITIVE AGREEMENT                    All parties

Disclosure is required regarding termination of any
definitive agreement that is material to the
securitization (other than expiration in accordance with
its terms), even if depositor is not a party.

Examples: servicing agreement, custodial agreement.

          ITEM 1.03- BANKRUPTCY OR RECEIVERSHIP                               Depositor

Disclosure is required regarding the bankruptcy or
receivership, with respect to any of the following:

-    Sponsor (Seller)                                                 Depositor/Sponsor (Seller)

-    Depositor                                                                Depositor

-    Master Servicer                                                       Master Servicer

-    Affiliated Servicer                                                       Servicer

-    Other Servicer servicing 20% or more of the pool                          Servicer
     assets at the time of the report

-    Other material servicers                                                  Servicer

-    Trustee                                                                   Trustee

-    Securities Administrator                                         Securities Administrator

-    Significant Obligor                                                      Depositor

-    Credit Enhancer (10% or more)                                            Depositor

-    Derivative Counterparty                                                  Depositor

-    Custodian                                                                Custodian
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
                                     FORM 8-K DISCLOSURE INFORMATION
---------------------------------------------------------------------------------------------------------
                     ITEM ON FORM 8-K                                     PARTY RESPONSIBLE
                     ----------------                                     -----------------
<S>                                                         <C>
ITEM 2.04- TRIGGERING EVENTS THAT ACCELERATE OR INCREASE                      Depositor
 A DIRECT FINANCIAL OBLIGATION OR AN OBLIGATION UNDER AN                   Master Servicer
              OFF-BALANCE SHEET ARRANGEMENT                           Securities Administrator

Includes an early amortization, performance trigger or
other event, including event of default, that would
materially alter the payment priority/distribution of
cash flows/amortization schedule.

Disclosure will be made of events other than waterfall
triggers which are disclosed in the monthly statements to
the certificateholders.

        ITEM 3.03- MATERIAL MODIFICATION TO RIGHTS                    Securities Administrator
                   OF SECURITY HOLDERS                                         Trustee
                                                                              Depositor

Disclosure is required of any material modification to
documents defining the rights of Certificateholders,
including the Pooling and Servicing Agreement.

  ITEM 5.03- AMENDMENTS OF ARTICLES OF INCORPORATION OR                       Depositor
              BYLAWS; CHANGE OF FISCAL YEAR

Disclosure is required of any amendment "to the governing
documents of the issuing entity".

 ITEM 6.01- ABS INFORMATIONAL AND COMPUTATIONAL MATERIAL                      Depositor

             ITEM 6.02- CHANGE OF SERVICER OR                        Master Servicer/Securities
                 SECURITIES ADMINISTRATOR                             Administrator/Depositor/
                                                                          Servicer/Trustee

Requires disclosure of any removal, replacement,
substitution or addition of any master servicer,
affiliated servicer, other servicer servicing 10% or more
of pool assets at time of report, other material
servicers or trustee.

Reg AB disclosure about any new servicer or master                Servicer/Master Servicer/Depositor
servicer is also required.

Reg AB disclosure about any new Trustee is also required.                      Trustee

         ITEM 6.03- CHANGE IN CREDIT ENHANCEMENT                  Depositor/Securities Administrator
                   OR EXTERNAL SUPPORT

Covers termination of any enhancement in manner other
than by its terms, the addition of an enhancement, or a
material change in the enhancement provided. Applies to
external credit enhancements as well as derivatives.
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
                                     FORM 8-K DISCLOSURE INFORMATION
---------------------------------------------------------------------------------------------------------
                     ITEM ON FORM 8-K                                     PARTY RESPONSIBLE
                     ----------------                                     -----------------
<S>                                                         <C>
Reg AB disclosure about any new enhancement provider is                       Depositor
also required.

    ITEM 6.04- FAILURE TO MAKE A REQUIRED DISTRIBUTION                Securities Administrator
                                                                               Trustee

      ITEM 6.05- SECURITIES ACT UPDATING DISCLOSURE                           Depositor

If any material pool characteristic differs by 5% or more
at the time of issuance of the securities from the
description in the final prospectus, provide updated Reg
AB disclosure about the actual asset pool.

If there are any new servicers or originators required to                     Depositor
be disclosed under Regulation AB as a result of the
foregoing, provide the information called for in Items
1108 and 1110 respectively.

               ITEM 7.01- REG FD DISCLOSURE                                  All parties

                 ITEM 8.01- OTHER EVENTS                                      Depositor

   Any event, with respect to which information is not
  otherwise called for in Form 8-K, that the registrant
        deems of importance to certificateholders.

       ITEM 9.01- FINANCIAL STATEMENTS AND EXHIBITS           Responsible party for reporting/disclosing
                                                                 the financial statement or exhibit
</TABLE>

<PAGE>

                                   SCHEDULE I

                        Prepayment Penalty Mortgage Loans

                            (Provided Upon Request)