Document:

Exhibit 4.13

                        DEBENTURE SUBSCRIPTION AGREEMENT

         DEBENTURE  SUBSCRIPTION  AGREEMENT,  dated  as of June 16,  2006  (this
"Agreement"), between First Banks, Inc., a Missouri corporation (the "Company"),
and First Bank Statutory  Trust VI, a statutory  trust created under the laws of
the State of Delaware (the "Trust"),  relating to the Junior  Subordinated  Debt
Securities  due July 7, 2036 (the "Junior  Subordinated  Debentures"),  issuable
pursuant to an Indenture,  dated as of June 16, 2006 (the "Indenture"),  between
the Company and Wells Fargo Bank, National Association, as Trustee.  Capitalized
terms used herein and not otherwise defined herein have the respective  meanings
ascribed thereto in the Purchase Agreement (as defined below).

         WHEREAS,  the Company,  the Trust and the Purchaser  named therein have
entered  into  a  Purchase  Agreement,   dated  June  14,  2006  (the  "Purchase
Agreement"),  in  connection  with the issuance  and sale of Capital  Securities
(liquidation  amount of $1,000 per security) (the "Capital  Securities")  by the
Trust; and

         WHEREAS,  the  Company  and  the  Trust  have  entered  into  a  Common
Securities Subscription  Agreement,  dated June 16, 2006 (the "Common Securities
Subscription  Agreement"),  in  connection  with the issuance and sale of Common
Securities (liquidation amount of $1,000 per security) (the "Common Securities")
by the Trust; and

         WHEREAS,  in  connection  with the  Purchase  Agreement  and the Common
Securities  Subscription  Agreement  and the  issuance  and sale of the  Capital
Securities and Common Securities pursuant thereto, the Trust desires to purchase
from the  Company,  and the  Company  desires to sell to the  Trust,  all of the
Junior Subordinated Debentures.

         NOW,  THEREFORE,  in  consideration  of the foregoing  premises and the
conditions and  agreements  hereinafter  set forth,  the parties hereto agree as
follows:

         1. The Trust  hereby  subscribes  for and offers to  purchase  from the
Company,  and the Company hereby accepts such offer and agrees to issue and sell
to the Trust,  contemporaneous  with the Closing Date, Twenty Five Million Seven
Hundred Seventy Four Thousand Dollars  ($25,774,000)  aggregate principal amount
of Junior Subordinated Debentures,  in consideration of the payment on or before
the date hereof of Twenty Five  Million  Seven  Hundred  Seventy  Four  Thousand
Dollars ($25,774,000) in immediately available funds.

         2. The Company  represents  and warrants  that the Junior  Subordinated
Debentures have been duly authorized and executed by the Company, and, when duly
authenticated and delivered to the Trust in accordance with the terms hereof and
the Indenture,  will constitute the valid and binding obligations of the Company
entitled to the benefits of the  Indenture,  enforceable  against the Company in
accordance with their terms,  except to the extent that enforcement  thereof may
be  limited  by  bankruptcy,  insolvency,  reorganization,  moratorium  or other
similar laws affecting  creditors' rights generally or by general  principles of
equity (regardless of whether considered in a proceeding in equity or at law).

         3. This Agreement  shall be deemed to be a contract made under the laws
of the  State of New  York,  and for all  purposes  shall be  governed  by,  and
construed in accordance  with,  the laws of the State of New York without regard
to conflict of law principles.

         4. This Agreement may be executed in any number of  counterparts,  each
of which  when so  executed  shall be  deemed  to be an  original,  but all such
counterparts shall together constitute but one and the same instrument.

<PAGE>

         IN WITNESS  WHEREOF,  the parties  hereto  have  caused this  Debenture
Subscription Agreement to be duly executed as of the date first written above.

                                First Banks, Inc.

                                By: /S/ Allen H. Blake
                                   ---------------------------------------------
                                Name:   Allen H. Blake
                                     -------------------------------------------
                                Title:  President & Chief Executive Officer
                                      ------------------------------------------

                                First Bank Statutory Trust VI

                                By: /s/ Allen H. Blake
                                   ---------------------------------------------
                                Name:   Allen H. Blake
                                Title:  Administrator

                                By: /s/ Lisa K. Vansickle
                                   ---------------------------------------------
                                Name:   Lisa K. Vansickle
                                Title:  AdministratorEXHIBIT 4.14

                          CAPITAL SECURITY CERTIFICATE

       THIS CAPITAL  SECURITY IS A GLOBAL CAPITAL SECURITY WITHIN THE MEANING OF
THE  DECLARATION  HEREINAFTER  REFERRED TO AND IS  REGISTERED IN THE NAME OF THE
DEPOSITORY  TRUST COMPANY ("DTC") OR A NOMINEE OF DTC. THIS CAPITAL  SECURITY IS
EXCHANGEABLE  FOR CAPITAL  SECURITIES  REGISTERED  IN THE NAME OF A PERSON OTHER
THAN DTC OR ITS  NOMINEE  ONLY IN THE  LIMITED  CIRCUMSTANCES  DESCRIBED  IN THE
DECLARATION,  AND NO TRANSFER OF THIS CAPITAL SECURITY (OTHER THAN A TRANSFER OF
THIS  CAPITAL  SECURITY AS A WHOLE BY DTC TO A NOMINEE OF DTC OR BY A NOMINEE OF
DTC TO DTC OR  ANOTHER  NOMINEE  OF DTC) MAY BE  REGISTERED  EXCEPT  IN  LIMITED
CIRCUMSTANCES.

       UNLESS THIS CAPITAL SECURITY IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF DTC TO  FIRST  BANK  STATUTORY  TRUST VI OR ITS  AGENT  FOR  REGISTRATION  OF
TRANSFER,  EXCHANGE OR PAYMENT, AND ANY CAPITAL SECURITY ISSUED IS REGISTERED AS
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT HEREON IS MADE
TO  CEDE  & CO.  OR TO  SUCH  OTHER  ENTITY  AS IS  REQUESTED  BY AN  AUTHORIZED
REPRESENTATIVE  OF DTC),  ANY TRANSFER,  PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE  BY OR TO ANY PERSON IS  WRONGFUL  INASMUCH  AS THE  REGISTERED  OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

       THIS SECURITY HAS NOT BEEN  REGISTERED  UNDER THE SECURITIES ACT OF 1933,
AS AMENDED (THE  "SECURITIES  ACT"),  OR ANY STATE  SECURITIES LAWS OR ANY OTHER
APPLICABLE   SECURITIES  LAWS.   NEITHER  THIS  SECURITY  NOR  ANY  INTEREST  OR
PARTICIPATION  HEREIN MAY BE REOFFERED,  SOLD, ASSIGNED,  TRANSFERRED,  PLEDGED,
ENCUMBERED  OR  OTHERWISE  DISPOSED  OF IN THE ABSENCE OF SUCH  REGISTRATION  OR
UNLESS SUCH  TRANSACTION  IS EXEMPT  FROM,  OR NOT SUBJECT TO, THE  REGISTRATION
REQUIREMENTS  OF  THE  SECURITIES  ACT.  THE  HOLDER  OF  THIS  SECURITY  BY ITS
ACCEPTANCE HEREOF AGREES TO OFFER, SELL OR OTHERWISE TRANSFER SUCH SECURITY ONLY
(A) TO THE  DEBENTURE  ISSUER OR THE TRUST,  (B) PURSUANT TO RULE 144A UNDER THE
SECURITIES ACT ("RULE 144A"),  TO A PERSON THE HOLDER  REASONABLY  BELIEVES IS A
"QUALIFIED  INSTITUTIONAL  BUYER" AS DEFINED IN RULE 144A THAT PURCHASES FOR ITS
OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE
IS GIVEN THAT THE TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A, (C) TO A "NON
U.S.  PERSON" IN AN "OFFSHORE  TRANSACTION"  PURSUANT TO  REGULATION S UNDER THE
SECURITIES ACT, (D) PURSUANT TO AN EXEMPTION FROM THE REGISTRATION  REQUIREMENTS
OF  THE  SECURITIES  ACT TO AN  "ACCREDITED  INVESTOR"  WITHIN  THE  MEANING  OF
SUBPARAGRAPH  (a) (1), (2), (3) OR (7) OF RULE 501 UNDER THE SECURITIES ACT THAT
IS  ACQUIRING  THE  SECURITY  FOR ITS OWN  ACCOUNT,  OR FOR  THE  ACCOUNT  OF AN
"ACCREDITED  INVESTOR," FOR  INVESTMENT  PURPOSES AND NOT WITH A VIEW TO, OR FOR
OFFER  OR  SALE  IN  CONNECTION  WITH,  ANY  DISTRIBUTION  IN  VIOLATION  OF THE
SECURITIES  ACT,  OR (E)  PURSUANT  TO  ANOTHER  AVAILABLE  EXEMPTION  FROM  THE
REGISTRATION  REQUIREMENTS  OF THE  SECURITIES  ACT,  SUBJECT  TO THE  DEBENTURE
ISSUER'S  AND THE  TRUST'S  RIGHT  PRIOR TO ANY  SUCH  OFFER,  SALE OR  TRANSFER
PURSUANT TO CLAUSES (D) OR (E) TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL,
CERTIFICATION  AND/OR  OTHER  INFORMATION   SATISFACTORY  TO  EACH  OF  THEM  IN
ACCORDANCE  WITH THE AMENDED AND RESTATED  DECLARATION OF TRUST, A COPY OF WHICH
MAY BE  OBTAINED  FROM THE  DEBENTURE  ISSUER OR THE  TRUST.  THE HOLDER OF THIS
SECURITY BY ITS ACCEPTANCE  HEREOF AGREES THAT IT WILL COMPLY WITH THE FOREGOING
RESTRICTIONS.

       THE HOLDER OF THIS SECURITY BY ITS ACCEPTANCE  HEREOF AGREES,  REPRESENTS
AND  WARRANTS  THAT IT WILL NOT ENGAGE IN HEDGING  TRANSACTIONS  INVOLVING  THIS
SECURITY UNLESS SUCH  TRANSACTIONS  ARE IN COMPLIANCE WITH THE SECURITIES ACT OR
AN APPLICABLE EXEMPTION THEREFROM.
<PAGE>

       THE  HOLDER  OF THIS  SECURITY  BY ITS  ACCEPTANCE  HEREOF  ALSO  AGREES,
REPRESENTS  AND  WARRANTS  THAT  IT  IS  NOT  AN  EMPLOYEE  BENEFIT,  INDIVIDUAL
RETIREMENT  ACCOUNT  OR  OTHER  PLAN OR  ARRANGEMENT  SUBJECT  TO TITLE I OF THE
EMPLOYEE  RETIREMENT  INCOME  SECURITY  ACT OF 1974,  AS AMENDED  ("ERISA"),  OR
SECTION 4975 OF THE  INTERNAL  REVENUE  CODE OF 1986,  AS AMENDED (THE  "CODE"),
(EACH A "PLAN"),  OR AN ENTITY WHOSE UNDERLYING  ASSETS INCLUDE "PLAN ASSETS" BY
REASON OF ANY PLAN'S  INVESTMENT  IN THE ENTITY  AND NO PERSON  INVESTING  "PLAN
ASSETS" OF ANY PLAN MAY ACQUIRE OR HOLD THIS  SECURITY OR ANY INTEREST  THEREIN,
UNLESS SUCH PURCHASER OR HOLDER IS ELIGIBLE FOR THE EXEMPTIVE  RELIEF  AVAILABLE
UNDER U.S.  DEPARTMENT OF LABOR  PROHIBITED  TRANSACTION  CLASS EXEMPTION 96-23,
95-60, 91-38, 90-1 OR 84-14 OR ANOTHER APPLICABLE  EXEMPTION OR ITS PURCHASE AND
HOLDING OF THIS  SECURITY IS NOT  PROHIBITED  BY SECTION 406 OF ERISA OR SECTION
4975 OF THE CODE WITH  RESPECT TO SUCH  PURCHASE OR HOLDING.  ANY  PURCHASER  OR
HOLDER  OF  THIS  SECURITY  OR ANY  INTEREST  THEREIN  WILL  BE  DEEMED  TO HAVE
REPRESENTED  BY ITS  PURCHASE  AND HOLDING  THEREOF THAT EITHER (i) IT IS NOT AN
EMPLOYEE  BENEFIT PLAN WITHIN THE MEANING OF SECTION 3(3) OF ERISA, OR A PLAN TO
WHICH SECTION 4975 OF THE CODE IS  APPLICABLE,  A TRUSTEE OR OTHER PERSON ACTING
ON BEHALF OF AN EMPLOYEE  BENEFIT  PLAN OR PLAN,  OR ANY OTHER  PERSON OR ENTITY
USING THE ASSETS OF ANY EMPLOYEE  BENEFIT PLAN OR PLAN TO FINANCE SUCH PURCHASE,
OR (ii) SUCH PURCHASE WILL NOT RESULT IN A PROHIBITED  TRANSACTION UNDER SECTION
406 OF  ERISA OR  SECTION  4975 OF THE CODE  FOR  WHICH  THERE IS NO  APPLICABLE
STATUTORY OR ADMINISTRATIVE EXEMPTION.

       IN CONNECTION WITH ANY TRANSFER, THE HOLDER WILL DELIVER TO THE REGISTRAR
AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION AS MAY BE REQUIRED BY
THE AMENDED  AND  RESTATED  DECLARATION  OF TRUST TO CONFIRM  THAT THE  TRANSFER
COMPLIES WITH THE FOREGOING RESTRICTIONS.

       THIS SECURITY WILL BE ISSUED AND MAY BE TRANSFERRED ONLY IN BLOCKS HAVING
A LIQUIDATION AMOUNT OF NOT LESS THAN $100,000 AND MULTIPLES OF $1,000 IN EXCESS
THEREOF. ANY ATTEMPTED TRANSFER OF THIS SECURITY IN A BLOCK HAVING A LIQUIDATION
AMOUNT OF LESS THAN  $100,000  SHALL BE DEEMED TO BE VOID AND OF NO LEGAL EFFECT
WHATSOEVER.  ANY SUCH PURPORTED  TRANSFEREE SHALL BE DEEMED NOT TO BE THE HOLDER
OF THIS SECURITY FOR ANY PURPOSE,  INCLUDING, BUT NOT LIMITED TO, THE RECEIPT OF
DISTRIBUTIONS ON THIS SECURITY, AND SUCH PURPORTED TRANSFEREE SHALL BE DEEMED TO
HAVE NO INTEREST WHATSOEVER IN THIS SECURITY.

<PAGE>

Certificate Number  [P-001]                  Number of Capital Securities 25,000

                              CUSIP NO: 319275 AA 1

                    Certificate Evidencing Capital Securities

                                       of

                          First Bank Statutory Trust VI

                               Capital Securities

                (liquidation amount $1,000 per Capital Security)

       First Bank Statutory  Trust VI, a statutory  trust created under the laws
of the State of Delaware (the  "Trust"),  hereby  certifies  that Cede & Co., as
nominee  on  behalf of The  Depository  Trust  Company  (the  "Holder"),  is the
registered  owner  of  25,000  capital  securities  of  the  Trust  representing
undivided  beneficial  interests  in the  assets of the  Trust,  designated  the
capital  securities  (liquidation  amount  $1,000  per  Capital  Security)  (the
"Capital  Securities").  Subject to the  Declaration  (as  defined  below),  the
Capital  Securities are  transferable  on the books and records of the Trust, in
person or by a duly authorized attorney, upon surrender of this Certificate duly
endorsed and in proper form for  transfer.  The Capital  Securities  represented
hereby  are  issued  pursuant  to,  and  the  designation,  rights,  privileges,
restrictions,  preferences  and  other  terms  and  provisions  of  the  Capital
Securities  shall in all respects be subject to, the  provisions  of the Amended
and Restated Declaration of Trust of the Trust, dated as of June 16, 2006, among
Allen H. Blake and Lisa K. Vansickle,  as  Administrators,  Wells Fargo Delaware
Trust Company, as Delaware Trustee,  Wells Fargo Bank, National Association,  as
Institutional  Trustee, First Banks, Inc., as Sponsor, and the holders from time
to time of undivided beneficial interests in the assets of the Trust,  including
the  designation of the terms of the Capital  Securities as set forth in Annex I
to  the  Declaration,  as the  same  may be  amended  from  time  to  time  (the
"Declaration").  Capitalized  terms used herein but not  defined  shall have the
meaning given them in the Declaration. The Holder is entitled to the benefits of
the Guarantee to the extent provided therein. The Sponsor will provide a copy of
the Declaration,  the Guarantee,  and the Indenture to the Holder without charge
upon written request to the Sponsor at its principal place of business.

       By acceptance of this  Security,  the Holder is bound by the  Declaration
and is entitled to the benefits thereunder.

       By acceptance of this  Security,  the Holder agrees to treat,  for United
States  federal  income tax purposes,  the  Debentures as  indebtedness  and the
Capital Securities as evidence of beneficial ownership in the Debentures.

       This  Capital  Security  is  governed  by,  and  shall  be  construed  in
accordance with, the laws of the State of Delaware, without regard to principles
of conflict of laws.

<PAGE>

       IN WITNESS WHEREOF, the Trust has duly executed this certificate.

                                    First Bank Statutory Trust VI

                                    By: /s/ Lisa K. Vansickle
                                       -----------------------------------------
                                        Name:  Lisa K. Vansickle
                                             -----------------------------------
                                        Title: Administrator

                                    Dated:     June 16, 2006
                                          --------------------------------------

                          CERTIFICATE OF AUTHENTICATION

       This is one of the Capital Securities referred to in the within-mentioned
Declaration.

                                    WELLS FARGO BANK, NATIONAL  ASSOCIATION, not
                                    in its individual capacity but solely as the
                                    Institutional Trustee

                                    By: /s/ Tracy M. Lamb
                                       -----------------------------------------
                                       Authorized Officer

                                    Dated:     June 16, 2006
                                          --------------------------------------

<PAGE>

                               REVERSE OF SECURITY

       Distributions  payable  on each  Capital  Security  will be  payable at a
variable per annum rate of interest, reset quarterly, equal to LIBOR (as defined
in the  Declaration)  plus 1.65% (the "Coupon  Rate") of the stated  liquidation
amount of $1,000 per Capital Security (provided,  however,  that the Coupon Rate
for any Distribution Payment Period may not exceed the highest rate permitted by
New York law,  as the same may be  modified  by  United  States  law of  general
applicability),  such  Coupon  Rate  being the rate of  interest  payable on the
Debentures to be held by the Institutional Trustee. Distributions in arrears for
more than one quarterly period will bear interest thereon  compounded  quarterly
at the then applicable Coupon Rate for each such quarterly period (to the extent
permitted by applicable law). The term  "Distributions"  as used herein includes
cash  distributions,  any  such  compounded  distributions  and  any  Additional
Interest payable on the Debentures  unless  otherwise  stated. A Distribution is
payable only to the extent that  payments are made in respect of the  Debentures
held by the Institutional  Trustee and to the extent the  Institutional  Trustee
has funds  legally  available in the Property  Account  therefor.  The amount of
Distributions  payable for any period will be  computed  for any full  quarterly
Distribution period on the basis of a 360-day year and the actual number of days
elapsed in the relevant Distribution Payment Period.

       Except  as  otherwise  described  below,  Distributions  on  the  Capital
Securities  will be cumulative,  will accrue from the date of original  issuance
and will be  payable  quarterly  in  arrears  on  January 7, April 7, July 7 and
October 7 of each year,  commencing  on October 7, 2006 (each,  a  "Distribution
Payment  Date").  Upon  submission  of Notice and so long as no Event of Default
pursuant to paragraphs (c), (e), (f) or (g) of Section 5.01 of the Indenture has
occurred  and is  continuing,  the  Debenture  Issuer  has the  right  under the
Indenture  to defer  payments of interest on the  Debentures  by  extending  the
interest  distribution period for up to 20 consecutive  quarterly periods (each,
an  "Extension  Period")  at any time and from  time to time on the  Debentures,
subject to the conditions  described  below,  during which  Extension  Period no
interest shall be due and payable  (except any  Additional  Interest that may be
due and payable).  During any Extension Period, interest will continue to accrue
on the Debentures,  and interest on such accrued interest (such accrued interest
and interest thereon  referred to herein as "Deferred  Interest") will accrue at
an  annual  rate  equal to the  Coupon  Rate in effect  for each such  Extension
Period,  compounded  quarterly  from the date such Deferred  Interest would have
been payable were it not for the Extension  Period,  to the extent  permitted by
law. No  Extension  Period may end on a date other than a  Distribution  Payment
Date. At the end of any such Extension  Period,  the Debenture  Issuer shall pay
all  Deferred  Interest  then  accrued and unpaid on the  Debentures;  provided,
                                                                       --------
however,  that  no  Extension  Period  may  extend  beyond  the  Maturity  Date,
-------
Redemption Date (to the extent  redeemed) or Special  Redemption  Date. Prior to
the termination of any Extension Period, the Debenture Issuer may further extend
such period,  provided,  that such period  together  with all such  previous and
              --------
further consecutive extensions thereof shall not exceed 20 consecutive quarterly
periods,  or extend  beyond the Maturity  Date,  Redemption  Date (to the extent
redeemed) or Special  Redemption  Date.  Upon the  termination  of any Extension
Period and upon the payment of all Deferred  Interest,  the Debenture Issuer may
commence a new  Extension  Period,  subject to the  foregoing  requirements.  No
interest or Deferred  Interest  (except any Additional  Interest that may be due
and payable) shall be due and payable during an Extension Period,  except at the
end  thereof,  but  Deferred  Interest  shall  accrue upon each  installment  of
interest that would  otherwise  have been due and payable  during such Extension
Period until such  installment  is paid.  If  Distributions  are  deferred,  the
Distributions  due shall be paid on the date that the related  Extension  Period
terminates to Holders of the  Securities as they appear on the books and records
of the Trust on the record date immediately  preceding such date.  Distributions
on the Securities  must be paid on the dates payable (after giving effect to any
Extension  Period) to the extent that the Trust has funds legally  available for
the payment of such  distributions  in the  Property  Account of the Trust.  The
Trust's funds  available for  Distribution to the Holders of the Securities will
be limited to  payments  received  from the  Debenture  Issuer.  The  payment of
Distributions  out of moneys held by the Trust is  guaranteed  by the  Guarantor
pursuant to the Guarantee.

       The  Capital   Securities   shall  be   redeemable  as  provided  in  the
Declaration.

<PAGE>

                                   ASSIGNMENT

       FOR VALUE RECEIVED,  the  undersigned  assigns and transfers this Capital
Security Certificate to:

-----------------------

-----------------------

-----------------------

(Insert assignee's social security or tax identification number)

-----------------------

-----------------------

-----------------------

(Insert address and zip code of assignee),

and irrevocably appoints
                         -------------------------------------------------------
as agent to  transfer  this  Capital  Security  Certificate  on the books of the
Trust. The agent may substitute another to act for it, him or her.

                    Date:
                         ---------------------------------------

                    Signature:
                              ----------------------------------

       (Sign  exactly as your name  appears  on the other  side of this  Capital
Security Certificate)

                    Signature Guarantee:1
                                         --------------------------------

---------------------------
     (1) Signature  must be guaranteed  by an "eligible  guarantor  institution"
     that is a bank,  stockbroker,  savings and loan association or credit union
     meeting the  requirements  of the Security  registrar,  which  requirements
     include  membership or  participation  in the  Securities  Transfer  Agents
     Medallion Program ("STAMP") or such other "signature  guarantee program" as
     may  be  determined  by  the  Security  registrar  in  addition  to,  or in
     substitution for, STAMP, all in accordance with the Securities Exchange Act
     of 1934, as amended.

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