UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C.  20549

                                    FORM 10-K

     [X] ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

     For the fiscal year ended December 31, 2007

     [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934

     For the transition period to __________ from _______________

     Commission file number of issuing entity: 333-140720-06

                          BCAPB LLC Trust 2007-AB1
          (Exact name of Issuing Entity as specified in its Charter)

                                  BCAP LLC
           (Exact name of depositor as specified in its Charter)

                              Barclays Bank PLC
             (Exact name of sponsor as specified in its Charter)

                                        Pooling Tier REMIC-1 26-0608040
                                        Pooling Tier REMIC-2 26-0608044
                                                 Lower REMIC 26-0608050
                                                 Upper REMIC 26-0608054
                    New York                   Grantor Trust 20-7491653
           (State or other jurisdiction                  (I.R.S. Employer
         incorporation or organization                Identification Number
               of issuing entity)                        of issuing entity)

          c/o Deutsche Bank National Trust Company
          1761 East St. Andrew Place
          Santa Ana, California                                  92705
 (Address of principal executive offices                     (Zip Code of
         of issuing entity)                                issuing entity)

            Issuing Entity's telephone number, including area code:
                               (714) 247-6000

          Securities registered pursuant to Section 12(b) of the Act:
                                     None.

          Securities registered pursuant to Section 12(g) of the Act:
                                     None.

     Indicate by check mark if the registrant is a well-known seasoned
     issuer, as defined in Rule 405 of the Securities Act.  Yes [ ]  No[X]

     Indicate by check mark if the registrant is not required to file
     reports pursuant to Section 13 or Section 15(d) of the Act.  Yes[ ] No[X]

     Indicate by check mark whether the registrant (1) has filed all reports
     required to be filed by Section 13 or 15(d) of the Securities Exchange
     Act of 1934 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.  Yes [X]  No [ ]

     Indicate by check mark if disclosure of delinquent filers pursuant to
     Item 405 of Regulation S-K (Section 229.405 of this chapter) is not
     contained herein, and will not be contained, to the best of the
     registrant's knowledge, in definitive proxy or information statements
     incorporated by reference in Part III of this Form 10-K or any amendment
     to this Form 10-K.                         Not Applicable.

     Indicate by check mark whether the registrant is a large accelerated
     filer, an accelerated filer, or a non-accelerated filer or a smaller
     reporting company.  See definitions of "large accelerated filer,"
     "accelerated filer" and "smaller reporting company" in Rule 12b-2
     of the Exchange Act.  (Check One):

      Large accelerated filer [  ]  Accelerated Filer [  ]
      Non-accelerated Filer [X] (Do not Check if a smaller reporting company)
      Smaller reporting company [  ]

     Indicate by check mark whether the registrant is a shell company (as
     defined in Rule 12b-2 of the Act).  [  ] Yes  [X] No

     State the aggregate market value of the voting and non-voting common
     equity held by non-affiliates computed by reference to the price at
     which the common equity was last sold, or the average bid and asked
     price of such common equity, as of the of the last business day of
     the registrant's most recently completed second fiscal quarter.

     Not Applicable.

     DOCUMENTS INCORPORATED BY REFERENCE

     See Item 15(a).

                                     PART I

     ITEM 1.  Business.

     Not Applicable.

     ITEM 1A.  Risk Factors.

     Not Applicable.

     ITEM 1B.  Unresolved Staff Comments.

     None.

     ITEM 2.  Properties.

     Not Applicable.

     ITEM 3.  Legal Proceedings.

     Not Applicable.

     ITEM 4.  Submission of Matters to a Vote of Security Holders.

     Not Applicable.

                                    PART II

     ITEM 5.  Market for Registrant's Common Equity, Related Stockholder
     Matters and Issuer Purchases of Equity Securities.

     Not Applicable.

     ITEM 6.  Selected Financial Data.

     Not Applicable.

     ITEM 7.  Management's Discussion and Analysis of Financial Condition and
     Results of Operations.

     Not Applicable.

     ITEM 7A.  Quantitative and Qualitative Disclosures About Market Risk.

     Not Applicable.

     ITEM 8.  Financial Statements and Supplementary Data.

     Not Applicable.

     ITEM 9.  Changes in and Disagreements with Accountants on Accounting and
     Financial Disclosure.

     Not Applicable.

     ITEM 9A.  Controls and Procedures.

     Not Applicable.

     ITEM 9A(T).  Controls and Procedures.

     Not Applicable.

     ITEM 9B. Other Information.

     None.

                                    PART III

     ITEM 10.  Directors, Executive Officers and Corporate Governance.

     Not Applicable.

     ITEM 11.  Executive Compensation.

     Not Applicable.

     ITEM 12.  Security Ownership of Certain Beneficial Owners and Management
               and Related Stockholder Matters.

     Not Applicable.

     ITEM 13.  Certain Relationships and Related Transactions, and
               Director Independence.

     Not Applicable.


     ITEM 14.  Principal Accounting Fees and Services.

     Not Applicable.

              ADDITIONAL ITEMS REQUIRED BY GENERAL INSTRUCTION J(2)

     Item 1112(b) of Regulation AB, Significant Obligor Financial Information.

     No single obligor represents 10% or more of the pool assets held by the
     issuing entity.

     Item 1114(b)(2) of Regulation AB, Significant Enhancement Provider
     Information.

     No entity or group of affiliated entities provides any external credit
     enhancement or other support for the certificates within this
     transaction as described under Item 1114(a) of Regulation AB.

     Item 1115(b) of Regulation AB, Certain Derivative Instruments.

     Barclays Bank PLC provides an interest rate swap derivative
     instrument for the issuing entity.  No additional disclosure
     is necessary because the significance percentage for the interest
     rate swap is less than 10%.

     Item 1117 of Regulation AB, Legal Proceedings.

     The registrant knows of no material pending legal proceedings involving
     the issuing entity and all parties relating to the issuing entity or
     any other entity contemplated by Item 1117 of Regulation AB other
     than routine litigation incidental to the duties of these respective
     parties.

     Item 1119 of Regulation AB, Affiliations and Certain Relationships and
     Related Transactions.

     The information regarding this Item has been previously filed in
     424(b)(5) filed on July 19, 2007 (Commission File No. 333-140720-06).

     Item 1122 of Regulation AB, Compliance with Applicable Servicing Criteria.

     See Exhibits 33 and 34.

     Item 1123 of Regulation AB, Servicer Compliance Statement.

     See Exhibit 35.

     Material Instances of Noncompliance.

     Charge offs were processed without obtaining approval. In December,
     at the request of the investor, charge offs that had been processed
     in 2007 were reversed and the Master Servicers were requested to
     restate 2007 activity.

                                     PART IV

     ITEM 15. Exhibits, Financial Statement Schedules.

     (a) Exhibits.

        (1) Not Applicable.

        (2) Not Applicable.

        (3)

        Exhibit 4 was filed as part of the Registrant's Current Report on Form
        8-K filed on August 3, 2007 (Commission File No. 333-140720-06) and is
        incorporated by reference herein.

        Exhibit 4 Trust Agreement, dated as of July 1, 2007, by and among BCAP
        LLC, as depositor, Wells Fargo Bank, N.A., as servicer custodian, and
        Deutsche Bank National Trust Company, as trustee.

        (31) Rule 13a-14(d)/15d-14(d) Certification.

        (33) Reports on assessment of compliance with servicing criteria
             for asset-backed securities.

             Exhibit 33.1 Wells Fargo Bank, N.A.'s as servicer Annual Report
             on Assessment of Compliance for Year End December 31, 2007.

             Exhibit 33.2 Wells Fargo Bank, N.A.'s as custodian Annual Report
             on Assessment of Compliance for Year End December 31, 2007.

             Exhibit 33.3 Deutsche Bank National Trust Company's Annual
             Report on Assessment of Compliance for Year End
             December 31, 2007.

        (34) Attestation reports on assessment of compliance with
             servicing criteria for asset-backed securities.

             Exhibit 34.1 Attestation Report on Assessment of Compliance
             with Servicing Criteria for Wells Fargo Bank, N.A.'s as servicer
             Report (Exhibit 33.3) for Year End December 31, 2007.

             Exhibit 34.2 Attestation Report on Assessment of Compliance
             with Servicing Criteria for Wells Fargo Bank, N.A.'s as custodian
             Report (Exhibit 33.2) for Year End December 31, 2007.

             Exhibit 34.3 Attestation Report on Assessment of Compliance
             with Servicing Criteria for Deutsche Bank National Trust
             Company's Report (Exhibit 33.3) for Year End December 31, 2007.

        (35) Servicer compliance statement.

             Exhibit 35.1 Wells Fargo Bank, N.A.'s Annual Statement of
             Compliance for Year End December 31, 2007.


     (b) See (a) above.

     (c) Not Applicable.


                                      SIGNATURE

          Pursuant to the requirements of Section 13 or 15(d) of the
          Securities Exchange Act of 1934, the registrant has duly caused
          this report to be signed on its behalf by the undersigned,
          thereunto duly authorized.


                           By: BCAP LLC,
                               (Depositor)


                                      By: /s/ Tom Hamilton
                                           Tom Hamilton
                                           President and
                                           Chief Exceitive Officer
                                          (Senior Officer in Charge of
                                           Securitization of the Depositor)



     Date: March 28, 2008



     EXHIBIT INDEX

        Exhibit 4 was filed as part of the Registrant's Current Report on Form
        8-K filed on August 3, 2007 (Commission File No. 333-140720-06) and is
        incorporated by reference herein.

        Exhibit 4 Trust Agreement, dated as of July 1, 2007, by and among BCAP
        LLC, as depositor, Wells Fargo Bank, N.A., as servicer custodian, and
        Deutsche Bank National Trust Company, as trustee.

        (31) Rule 13a-14(d)/15d-14(d) Certification.

        (33) Reports on assessment of compliance with servicing criteria
             for asset-backed securities.

             Exhibit 33.1 Wells Fargo Bank, N.A.'s as servicer Annual Report
             on Assessment of Compliance for Year End December 31, 2007.

             Exhibit 33.2 Wells Fargo Bank, N.A.'s as custodian Annual Report
             on Assessment of Compliance for Year End December 31, 2007.

             Exhibit 33.3 Deutsche Bank National Trust Company's Annual
             Report on Assessment of Compliance for Year End
             December 31, 2007.

        (34) Attestation reports on assessment of compliance with
             servicing criteria for asset-backed securities.

             Exhibit 34.1 Attestation Report on Assessment of Compliance
             with Servicing Criteria for Wells Fargo Bank, N.A.'s as servicer
             Report (Exhibit 33.3) for Year End December 31, 2007.

             Exhibit 34.2 Attestation Report on Assessment of Compliance
             with Servicing Criteria for Wells Fargo Bank, N.A.'s as custodian
             Report (Exhibit 33.2) for Year End December 31, 2007.

             Exhibit 34.3 Attestation Report on Assessment of Compliance
             with Servicing Criteria for Deutsche Bank National Trust
             Company's Report (Exhibit 33.3) for Year End December 31, 2007.

        (35) Servicer compliance statement.

             Exhibit 35.1 Wells Fargo Bank, N.A.'s Annual Statement of
             Compliance for Year End December 31, 2007.