Document:

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                                                                    EXHIBIT 10.6

                                                                  EXECUTION COPY

WHENEVER CONFIDENTIAL INFORMATION IS OMITTED HEREIN (SUCH OMISSIONS ARE DENOTED
BY AN ASTERISK*), SUCH CONFIDENTIAL INFORMATION HAS BEEN SUBMITTED SEPARATELY TO
THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL
TREATMENT.

                               OPERATING AGREEMENT

                                       OF

                       ADM / METABOLIX SALES COMPANY, LLC

                                 BY AND BETWEEN

                             ADM POLYMER CORPORATION

                                        &

                                 METABOLIX INC.

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                                TABLE OF CONTENTS

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OPERATING AGREEMENT ............................................................................1

BY AND BETWEEN .................................................................................1

ADM POLYMER CORPORATION ........................................................................1

METABOLIX INC. .................................................................................1

TABLE OF CONTENTS ..............................................................................I

OPERATING AGREEMENT ............................................................................1

SECTION 1:  THE JOINT SALES COMPANY ............................................................1

  1.1   FORMATION ..............................................................................1
  1.2   NAME ...................................................................................1
  1.3   PURPOSE; POWERS ........................................................................1
  1.4   PRINCIPAL PLACE OF BUSINESS ............................................................2
  1.5   TERM ...................................................................................2
  1.6   FILINGS; AGENT FOR SERVICE OF PROCESS ..................................................2
  1.7   TITLE TO PROPERTY ......................................................................3
  1.8   PAYMENTS OF INDIVIDUAL OBLIGATIONS .....................................................3
  1.9   INDEPENDENT ACTIVITIES; TRANSACTIONS WITH AFFILIATES ...................................3
  1.10  DEFINITIONS ............................................................................4

SECTION 2:  MEMBERS' CAPITAL CONTRIBUTIONS ....................................................17

  2.1   ORIGINAL CAPITAL CONTRIBUTIONS ........................................................17
  2.2   CONTRIBUTIONS .........................................................................17
  2.3   ADDITIONAL CAPITAL CONTRIBUTIONS ......................................................17

SECTION 3:  ALLOCATIONS .......................................................................18

  3.1   PROFITS ...............................................................................18
  3.2   LOSSES ................................................................................18
  3.3   SPECIAL ALLOCATIONS ...................................................................18
  3.4   CURATIVE ALLOCATIONS ..................................................................20
  3.5   LOSS LIMITATION .......................................................................20
  3.6   OTHER ALLOCATION RULES ................................................................20
  3.7   TAX ALLOCATIONS:  CODE SECTION 704(C) .................................................21

SECTION 4:  DISTRIBUTIONS .....................................................................21

  4.1   NET CASH FLOW .........................................................................21
  4.4   LIMITATIONS ON DISTRIBUTIONS ..........................................................22

SECTION 5:  MANAGEMENT ........................................................................22

  5.1   DIRECTORS; BOARD OF DIRECTORS .........................................................22
  5.2   MEETINGS OF THE BOARD OF DIRECTORS ....................................................23
  5.3   BOARD OF DIRECTORS POWERS .............................................................24
  5.4   DUTIES AND OBLIGATIONS OF THE BOARD OF DIRECTORS ......................................27
  5.5   REIMBURSEMENTS ........................................................................27
  5.6   INDEMNIFICATION OF THE DIRECTORS AND OFFICERS .........................................28
  5.7   APPOINTMENT OF OFFICERS, AGENTS AND REPRESENTATIVES: ..................................29

SECTION 6:  ROLE OF MEMBERS ...................................................................31

  6.1   RIGHTS OR POWERS ......................................................................31
  6.2   VOTING RIGHTS .........................................................................31
  6.3   REQUIRED MEMBER CONSENTS ..............................................................31
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  6.5   WITHDRAWAL/RESIGNATION ................................................................33
  6.6   MEMBER COMPENSATION ...................................................................33
  6.7   MEMBERS LIABILITY .....................................................................33
  6.8   PARTITION .............................................................................34
  6.9   CONFIDENTIALITY .......................................................................34
  6.10  TRANSACTIONS BETWEEN A MEMBER AND THE JOINT SALES COMPANY .............................34
  6.11  OTHER INSTRUMENTS .....................................................................34
  6.12  NUMBER OF MEMBERS .....................................................................35
  6.13  EQUALIZATION PAYMENTS .................................................................35

SECTION 7:  REPRESENTATIONS AND WARRANTIES ....................................................35

  7.1   IN GENERAL ............................................................................35
  7.2   REPRESENTATIONS AND WARRANTIES ........................................................35

SECTION 8:  ACCOUNTING, BOOKS AND RECORDS .....................................................37

  8.1   ACCOUNTING, BOOKS AND RECORDS .........................................................37
  8.2   REPORTS ...............................................................................38
  8.3   TAX MATTERS ...........................................................................39

SECTION 9:  AMENDMENTS ........................................................................39

  9.1   AMENDMENTS ............................................................................39

SECTION 10:  TRANSFERS ........................................................................40

  10.1  RESTRICTIONS ON TRANSFERS .............................................................40
  10.2  PERMITTED TRANSFERS ...................................................................40
  10.3  CONDITIONS TO PERMITTED TRANSFERS .....................................................40
  10.4  [RESERVED] ............................................................................41
  10.5  PROHIBITED TRANSFERS ..................................................................41
  10.6  TAX TERMINATION RESTRICTIONS ..........................................................42
  10.7  RIGHTS OF UNADMITTED ASSIGNEES ........................................................42
  10.8  ADMISSION OF SUBSTITUTED MEMBERS ......................................................42
  10.9  REPRESENTATIONS REGARDING TRANSFERS; LEGEND ...........................................43
  10.10 DISTRIBUTIONS AND ALLOCATIONS IN RESPECT OF TRANSFERRED UNITS .........................44

SECTION 11:  ADVERSE ACT ......................................................................45

  11.1  REMEDIES ..............................................................................45

SECTION 12:  DISSOLUTION AND WINDING UP .......................................................46

  12.1  DISSOLUTION EVENTS ....................................................................46
  12.2  WINDING UP ............................................................................47
  12.3  COMPLIANCE WITH CERTAIN REQUIREMENTS OF REGULATIONS; DEFICIT CAPITAL ACCOUNTS .........48
  12.4  DEEMED DISTRIBUTION AND RECONTRIBUTION ................................................48
  12.5  RIGHTS OF MEMBERS .....................................................................49
  12.6  NOTICE OF DISSOLUTION/TERMINATION .....................................................49
  12.7  ALLOCATIONS DURING PERIOD OF LIQUIDATION ..............................................49
  12.8  CHARACTER OF LIQUIDATING DISTRIBUTIONS ................................................49
  12.9  THE LIQUIDATOR ........................................................................50
  12.10 FORM OF LIQUIDATING DISTRIBUTIONS .....................................................50

SECTION 13:  MISCELLANEOUS ....................................................................50

  13.1  NOTICES ...............................................................................50
  13.2  BINDING EFFECT ........................................................................52
  13.3  CONSTRUCTION ..........................................................................52
  13.4  TIME ..................................................................................52
  13.5  HEADINGS ..............................................................................52
  13.6  SEVERABILITY ..........................................................................52
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  13.7  INCORPORATION BY REFERENCE ............................................................53
  13.8  VARIATION OF TERMS ....................................................................53
  13.9  GOVERNING LAW .........................................................................53
  13.10 COUNTERPART EXECUTION .................................................................53
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                               OPERATING AGREEMENT

                                       OF

                       ADM / METABOLIX SALES COMPANY, LLC

       This OPERATING AGREEMENT is entered into and shall be effective as of the
12th day of July, 2006, by and between the Persons who are identified as Members
on Exhibit A attached hereto and who have executed a counterpart of this
Agreement as Members pursuant to the provisions of the Act, on the following
terms and conditions:

                       SECTION 1: THE JOINT SALES COMPANY

              1.1    FORMATION.

       The Members hereby agree to form the Joint Sales Company as a limited
liability company under and pursuant to the provisions of the Act and upon the
terms and conditions set forth in this Agreement. The fact that the Certificate
is on file in the office of the Secretary of State, State of Delaware, shall
constitute notice that the Joint Sales Company is a limited liability company.
Simultaneously with the execution of this Agreement and the formation of the
Joint Sales Company, each of the Members shall be admitted as a member of the
Joint Sales Company. The rights and liabilities of the Members shall be as
provided under the Act, the Certificate and this Operating Agreement.

              1.2    NAME.

       The name of the Joint Sales Company shall be ADM / Metabolix Sales
Company, LLC and all business of the Joint Sales Company shall be conducted in
such name. The Board of Directors may change the name of the Joint Sales Company
upon ten (10) Business Days' notice to the Members.

              1.3    PURPOSE; POWERS.

       (a)    The purposes of the Joint Sales Company are (i) to operate the
Business, (ii) to make such additional investments and engage in such additional
activities as the Members may approve pursuant to the terms and conditions of
this Operating Agreement, and (iii) to engage in any and all activities related
or incidental to the purposes set forth in clauses (i) and (ii).

       (b)    The Joint Sales Company has the power to do any and all acts
necessary, appropriate, proper, advisable, incidental or convenient to or in
furtherance of the purposes of the Joint Sales Company set forth in this Section
1.3 and has, without limitation, any and all

* CONFIDENTIAL TREATMENT REQUESTED

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powers that may be exercised on behalf of the Joint Sales Company by the Board
of Directors pursuant to Section 5 hereof.

              1.4    PRINCIPAL PLACE OF BUSINESS.

       The principal place of business of the Joint Sales Company shall be at 21
Erie Street, Cambridge, MA 02139. The Board of Directors may change the
principal place of business of the Joint Sales Company to any other place within
or without the State of Delaware upon ten (10) Business Days notice to the
Members. The registered office of the Joint Sales Company in the State of
Delaware initially is located at c/o The Corporation Trust Company, Corporation
Trust Center, 1209 Orange Street, Wilmington, Delaware 19801.

              1.5    TERM.

       The term of the Joint Sales Company shall commence on the date the
certificate of formation of the Joint Sales Company as such term is described in
the Act (the "Certificate") is filed in the office of the Secretary of State of
the State of Delaware in accordance with the Act and shall continue until the
winding up and liquidation of the Joint Sales Company and its business is
completed following a Dissolution Event, as provided in Section 12 hereof. Prior
to the time that the Certificate is filed, no Person shall represent to third
parties the existence of the Joint Sales Company or hold himself out as a Member
or Director.

              1.6    FILINGS; AGENT FOR SERVICE OF PROCESS.

       (a)    The Directors are hereby severally authorized to and at least one
of them shall cause the Certificate to be filed in the office of the Secretary
of State of the State of Delaware in accordance with the Act. The Board of
Directors shall take any and all other actions reasonably necessary to perfect
and maintain the status of the Joint Sales Company as a limited liability
company under the laws of the State of Delaware, including the preparation and
filing of such amendments to the Certificate and such other assumed name
certificates, documents, instruments and publications as may be required by law,
including, without limitation, action to reflect:

              (i)    a change in the Joint Sales Company name; or

              (ii)   a correction of false or erroneous statements in the
              Certificate or the desire of the Members to make a change in any
              statement therein in order that it shall accurately represent the
              agreement among the Members.

       (b)    The Members and the Board of Directors shall execute and cause to
be filed original or amended certificates and shall take any and all other
actions as may be reasonably necessary to perfect and maintain the status of the
Joint Sales Company as a limited liability company or similar type of entity
under the laws of any other jurisdictions in which the Joint Sales Company
engages in business.

*  CONFIDENTIAL TREATMENT REQUESTED

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       (c)    The registered agent for service of process on the Joint Sales
Company in the State of Delaware shall be The Corporation Trust Company, or any
successor as appointed by the Members in accordance with the Act.

       (d)    Upon the dissolution and completion of the winding up and
liquidation of the Joint Sales Company in accordance with Section 12, the Board
of Directors shall promptly execute and cause to be filed a certificate of
cancellation in accordance with the Act and the laws of any other jurisdictions
in which the Board of Directors deems such filing necessary or advisable.

              1.7    TITLE TO PROPERTY.

       All Property owned by the Joint Sales Company shall be owned by the
Joint Sales Company as an entity and no Member shall have any ownership interest
in such Property in its individual name, and each Member's interest in the Joint
Sales Company shall be personal property for all purposes. At all times after
the Effective Date, the Joint Sales Company shall hold title to all of its
Property in the name of the Joint Sales Company and not in the name of any
Member.

              1.8    PAYMENTS OF INDIVIDUAL OBLIGATIONS.

       Except as expressly set forth in the Commercial Alliance Agreements,
the Joint Sales Company's credit and assets shall be used solely for the benefit
of the Joint Sales Company, and no asset of the Joint Sales Company shall be
Transferred or encumbered for, or in payment of, any individual obligation of
any Member without the unanimous consent of the Members.

              1.9    INDEPENDENT ACTIVITIES; TRANSACTIONS WITH AFFILIATES.

       (a)    Each Director shall be required to devote such time to the affairs
of the Joint Sales Company as may be necessary to manage and operate the Joint
Sales Company, and shall be free to serve any other Person or enterprise in any
capacity that such Director may deem appropriate in his, her or its discretion.

       (b)    Insofar as permitted by applicable law and except as otherwise
provided in the Commercial Alliance Agreements, neither this Agreement nor any
activity undertaken pursuant hereto shall prevent any Member or Director or
their Affiliates from engaging in whatever activities they choose, whether the
same are competitive with the Joint Sales Company or otherwise, and any such
activities may be undertaken without having or incurring any obligation to offer
any interest in such activities to the Joint Sales Company or any Member, or
require any Member or Director to permit the Joint Sales Company or any other
Director or Member or its Affiliates to participate in any such activities, and
as a material part of the consideration for the execution of this Agreement by
each Member, each Member hereby waives, relinquishes, and renounces any such
right or claim of participation.

       (c)    To the extent permitted by applicable law and subject to the
provisions of the Commercial Alliance Agreements, the Board of Directors is
hereby authorized to cause the

*  CONFIDENTIAL TREATMENT REQUESTED

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Joint Sales Company to purchase Property from, sell Property to or otherwise
deal with any Member or Director, acting on its own behalf, or any Affiliate of
any Member or Director; PROVIDED that, except as set forth in Section 6.10
hereof, any such purchase, sale or other transaction shall be made on terms and
conditions which are no less favorable to the Joint Sales Company than if the
sale, purchase or other transaction had been made with an independent third
party.

              1.10   DEFINITIONS.

       Capitalized words and phrases used in this Agreement have the following
meanings:

       "ACT" means the Delaware Limited Liability Company Act, 6 Del. C.
Section 18-101, et seq., as amended from time to time (or any corresponding
provisions of succeeding law).

       "ADDITIONAL CAPITAL CONTRIBUTIONS" means, with respect to each Member,
the Capital Contributions made by such Member pursuant to Section 2.3 hereof. In
the event Units are Transferred in accordance with the terms of this Agreement,
the transferee shall succeed to the Additional Capital Contributions of the
transferor to the extent they relate to the Transferred Units.

       "ADJUSTED CAPITAL ACCOUNT DEFICIT" means, with respect to any Member,
the deficit balance, if any, in such Member's Capital Account as of the end of
the relevant Allocation Year, after giving effect to the following adjustments:

                     (i)    Credit to such Capital Account any amounts which
              such Member is deemed to be obligated to restore pursuant to the
              penultimate sentences in Sections 1.704-2(g)(1) and 1.704-2(i)(5)
              of the Regulations; and

                     (ii)   Debit to such Capital Account the items described in
              Sections 1.704-1(b)(2)(ii)(d)(4), 1.704-1(b)(2)(ii)(d)(5) and
              1.704-1(b)(2)(ii)(d)(6) of the Regulations.

The foregoing definition of Adjusted Capital Account Deficit is intended to
comply with the provisions of Section 1.704-1(b)(2)(ii)(d) of the Regulations
and shall be interpreted consistently therewith.

       "ADM POLYMER CORPORATION" means ADM Polymer Corporation.

       "ADM POLYMER CORPORATION MANUFACTURING AGREEMENT" means the Manufacturing
Agreement by and between ADM Polymer Corporation and the Joint Sales Company
entered into simultaneously herewith.

       "ADM POLYMER CORPORATION MANUFACTURING FACILITY" means the facility to be
constructed by ADM Polymer Corporation, pursuant to the Commercial Alliance
Agreement, to manufacture PHA Material pursuant to the ADM Polymer Corporation
Manufacturing Agreement.

*  CONFIDENTIAL TREATMENT REQUESTED

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       "ADM POLYMER CORPORATION MARGIN" has the meaning assigned to the term
"Manufacturing Margin" in the ADM Polymer Corporation Manufacturing Agreement.

       "ADM POLYMER CORPORATION SERVICES AGREEMENT" means the agreement entitled
ADM Polymer Corporation Services Agreement entered into simultaneously herewith
between ADM Polymer Corporation and the Joint Sales Company pursuant to which
ADM Polymer Corporation shall provide the Joint Sales Company with certain
specified services, all for the Joint Sales Company's Business.

       "ADVERSE ACT" means, with respect to any Member, any of the following:

                     (i)    A failure of such Member to make any Capital
              Contribution required pursuant to any provision of this Agreement;

                     (ii)   A material breach of any Commercial Alliance
              Agreement by such Member resulting in the termination of such
              Commercial Alliance Agreement by another party thereto;

                     (iii)  A Transfer of all or any portion of such Member's
              Units except as expressly permitted or required by this Agreement;
              and

                     (iv)   Any dissolution or liquidation of a Member, unless
              substantially all assets of the Member (including, without
              limitation, this Agreement and all rights hereunder) are
              transferred or are to be transferred to a Wholly Owned Affiliate
              of such Member.

       An "ADVERSE MEMBER" is any Member with respect to whom an Adverse Act has
occurred.

       "AFFILIATE" of a Person means any other Person that, directly or
indirectly, through one or more intermediaries, controls, is controlled by, or
is under common control with, such Person. "Control" and, with correlative
meanings, the terms "controlled by" and "under common control with" shall mean
the power to direct or cause the direction of the management or policies of a
Person, whether through the ownership of voting securities, by contract,
resolution, regulation, or otherwise.

       "AGREEMENT" or "OPERATING AGREEMENT" means this Operating Agreement
including all Exhibits and Schedules attached hereto, as amended from time to
time. Words such as "herein," "hereinafter," "hereof," "hereto" and "hereunder"
refer to this Agreement as a whole, unless the context otherwise requires.

       "ALLOCATION YEAR" means (i) the period commencing on the Effective Date
and ending on December 31, 2006, (ii) any subsequent twelve (12) month period
commencing on January 1 and ending on December 31 or (iii) any portion of the
period described in clauses (i)

*  CONFIDENTIAL TREATMENT REQUESTED

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or (ii) for which the Joint Sales Company is required to allocate Profits,
Losses and other items of Joint Sales Company income, gain, loss or deduction
pursuant to Section 3 hereof.

       "AVAILABLE CASH" means on any date the amount of cash held by the Joint
Sales Company less all expenses of the Joint Sales Company less all other cash
requirements of the Joint Sales Company, as reasonably determined by the
unanimous decision of the Board of Directors.

       "BOARD OF DIRECTORS" has the meaning set forth in Section 5.1(a) hereof.

       "BUSINESS" means (i) the business of operating, managing, and/or
developing the manufacture, marketing and sale of PHA Material and PHA
Formulations worldwide, consistent with the terms of the Commercial Alliance
Agreements, and (ii) any other business that the Members may unanimously
approve.

       "BUSINESS DAY" means a day of the year on which banks are not required or
authorized to close in New York, New York.

       "CAPITAL ACCOUNT" means, with respect to any Member, the Capital Account
maintained for such Member in accordance with the following provisions:

                     (i)    To each Member's Capital Account there shall be
              credited (A) such Member's Capital Contributions, (B) such
              Member's distributive share of Profits and any items in the nature
              of income or gain which are specially allocated pursuant to
              Section 3.3 or Section 3.4 hereof, and (C) the amount of any Joint
              Sales Company liabilities assumed by such Member or which are
              secured by any Property distributed to such Member. The principal
              amount of a promissory note which is not readily traded on an
              established securities market and which is contributed to the
              Joint Sales Company by the maker of the note (or a Member related
              to the maker of the note within the meaning of Regulations Section
              1.704-1(b)(2)(ii)(c)) shall not be included in the Capital Account
              of any Member until the Joint Sales Company makes a taxable
              disposition of the note or until (and to the extent) principal
              payments are made on the note, all in accordance with Regulations
              Section 1.704-1(b)(2)(iv)(d)(2);

                     (ii)   To each Member's Capital Account there shall be
              debited (A) the amount of money and the Gross Asset Value of any
              Property distributed to such Member pursuant to any provision of
              this Agreement, (B) such Member's distributive share of Losses and
              any items in the nature of expenses or losses which are specially
              allocated pursuant to Section 3.3 or Section 3.4 hereof, and (C)
              the amount of any liabilities of such Member assumed by the Joint
              Sales Company or which are secured by any Property contributed by
              such Member to the Joint Sales Company;

*  CONFIDENTIAL TREATMENT REQUESTED

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                     (iii)  In the event Units are Transferred in accordance
              with the terms of this Agreement, the transferee shall succeed to
              the Capital Account of the transferor to the extent it relates to
              the Transferred Units; and

                     (iv)   In determining the amount of any liability for
              purposes of subparagraphs (i) and (ii) above there shall be taken
              into account Code Section 752(c) and any other applicable
              provisions of the Code and Regulations.

       The foregoing provisions and the other provisions of this Agreement
relating to the maintenance of Capital Accounts are intended to comply with
Regulations Section 1.704-1(b), and shall be interpreted and applied in a manner
consistent with such Regulations. In the event the Board of Directors shall
determine that it is prudent to modify the manner in which the Capital Accounts,
or any debits or credits thereto (including, without limitation, debits or
credits relating to liabilities which are secured by contributed or distributed
property or which are assumed by the Joint Sales Company or any Members), are
computed in order to comply with such Regulations, the Board of Directors by a
unanimous decision may make such modification, provided that it is not likely to
have a material effect on the amounts distributed to any Person pursuant to
Section 12 hereof upon the dissolution of the Joint Sales Company. The Board of
Directors by a unanimous decision also shall (i) make any adjustments that are
necessary or appropriate to maintain equality between the Capital Accounts of
the Members and the amount of capital reflected on the Joint Sales Company's
balance sheet, as computed for book purposes, in accordance with Regulations
Section 1.704-1(b)(2)(iv)(q), and (ii) make any appropriate modifications in the
event unanticipated events might otherwise cause this Agreement not to comply
with Regulations Section 1.704-1(b).

       "CAPITAL CONTRIBUTIONS" means, with respect to any Member, the amount of
money and the initial Gross Asset Value of any Property (other than money)
contributed to the Joint Sales Company with respect to the Units in the Joint
Sales Company held or purchased by such Member, including Additional Capital
Contributions.

       "CERTIFICATE" means the certificate of formation filed with the Secretary
of State of the State of Delaware on the date hereof pursuant to the Act to form
the Company, as originally executed and amended, modified, supplemented or
restated from time to time, as the context requires.

       "CERTIFICATE OF CANCELLATION" means a certificate filed in accordance
with 6 Del. C. Section 18-203.

       "CHAIRMAN" means the Chairman of the Board of Directors of the Company.

       "CODE" means the United States Internal Revenue Code of 1986, as amended
from time to time.

       "COMMERCIAL ALLIANCE AGREEMENT" means the Commercial Alliance Agreement
by and between ADM Polymer Corporation, MBX and the Joint Sales Company, entered
into simultaneously herewith.

*  CONFIDENTIAL TREATMENT REQUESTED

                                        7
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       "COMMERCIAL ALLIANCE AGREEMENTS" means this Agreement, the Commercial
Alliance Agreement, the ADM Polymer Corporation Manufacturing Agreement, the MBX
Formulation Agreement, the ADM Polymer Corporation Service Agreement, the MBX
Service Agreement and the Loan and Security Agreement.

       "COMPANY MINIMUM GAIN" has the same meaning as the term "Company Minimum
Gain" in Section 1.704-2(d) of the Regulations.

       "CONSTRUCT" shall have the meaning set forth in the Commercial Alliance
Agreement.

       "DAMAGES" shall have the meaning set forth in Section 11.1 hereof.

       "DEBT" means (i) any indebtedness for borrowed money or the deferred
purchase price of property as evidenced by a note, bonds, or other instruments,
(ii) obligations as lessee under capital leases, (iii) obligations secured by
any mortgage, pledge, security interest, encumbrance, lien or charge of any kind
existing on any asset owned or held by the Company whether or not the Company
has assumed or become liable for the obligations secured thereby, (iv) any
obligation under any interest rate swap agreement, (v) accounts payable and (vi)
obligations under direct or indirect guarantees of (including obligations
(contingent or otherwise) to assure a creditor against loss in respect of)
indebtedness or obligations of the kinds referred to in clauses (i), (ii),
(iii), (iv) and (v), above provided that Debt shall not include obligations in
respect of any accounts payable that are incurred in the ordinary course of the
Company's business and are not delinquent or are being contested in good faith
by appropriate proceedings.

       "DEFENDANT" shall have the meaning set forth in Section 12.11(b)(ii)
hereof.

       "DEPRECIATION" means, for each Allocation Year, an amount equal to the
depreciation, amortization, or other cost recovery deduction allowable for
federal income tax purposes with respect to an asset for such Allocation Year,
except that (x) with respect to any asset whose Gross Asset Value differs from
its adjusted tax basis for United States federal income tax purposes and which
difference is being eliminated by use of the "remedial method" defined by
Section 1.704-3(d) of the Regulations, Depreciation for such Allocation Year
shall be the amount of book basis recovered for such Allocation Year under the
rules prescribed by Section 1.704-3(d)(2) of the Regulations and (y) with
respect to any other asset whose Gross Asset Value differs from its adjusted
basis for federal income tax purposes at the beginning of such Allocation Year,
Depreciation shall be an amount which bears the same ratio to such beginning
Gross Asset Value as the federal income tax depreciation, amortization, or other
cost recovery deduction for such Allocation Year bears to such beginning
adjusted tax basis; PROVIDED, HOWEVER, that if the adjusted basis for federal
income tax purposes of an asset at the beginning of such Allocation Year is
zero, Depreciation shall be determined with reference to such beginning Gross
Asset Value using any reasonable method selected by the Board of Directors.

*  CONFIDENTIAL TREATMENT REQUESTED

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       "DIRECTOR" means any of the individuals elected by the Members to serve
on the Board of Directors and "DIRECTORS" means all of such individuals.
Directors shall be "managers" within the meaning of the Act.

       "DISSOLUTION EVENT" shall have the meaning set forth in Section 12.1
hereof.

       "EFFECTIVE DATE" means the date first set forth above as the effective
date hereof.

       "ELECTION NOTICE" shall have the meaning set forth in Section 11.2(a)
hereof.

       "ELECTION PERIOD" shall have the meaning set forth in Section 11.2(b)
hereof.

       "EQUALIZATION DATE" means the first Business Day after the First
Commercial Sale that the Ledger Account is reduced to zero.

       "EQUALIZATION DISTRIBUTION DATE" means a date not more than thirty (30)
days following the end of each Fiscal Quarter during the Equalization Period.

       "EQUALIZATION PAYMENT" means on any Equalization Distribution Date on
which both MBX and ADM Polymer Corporation (or a Wholly Owned Affiliate of MBX
or ADM Polymer Corporation) are Members of the Joint Sales Company, an amount
equal to the following (without duplication):

                     (i)    with respect to MBX, the sum of (a) the amount, if
                            any, by which payments to ADM Polymer Corporation of
                            ADM Polymer Corporation Margin under the ADM Polymer
                            Corporation Manufacturing Agreement during the
                            Equalization Period exceed the sum of royalty
                            payments to MBX under the Commercial Alliance
                            Agreement, payments to MBX pursuant to Section 4.3.6
                            of the Commercial Alliance Agreement, and MBX Margin
                            under the MBX Formulation Agreement, plus (b) MBX
                            Equalization Payments relating to prior Equalization
                            Periods that were not paid on account of
                            insufficient Available Cash, if any; and

                     (ii)   with respect to ADM Polymer Corporation, the sum of
                            (a) the amount, if any, by which the sum of royalty
                            payments to MBX under the Commercial Alliance
                            Agreement, payments to MBX pursuant to Section 4.3.6
                            of the Commercial Alliance Agreement, and MBX Margin
                            under the MBX Formulation Agreement exceed payments
                            to ADM Polymer Corporation of ADM Polymer
                            Corporation Margin under the ADM Polymer Corporation
                            Manufacturing Agreement during the Equalization
                            Period, plus (b) ADM Polymer Corporation's
                            Equalization Payments relating to prior Equalization
                            Periods that were not paid on account of
                            insufficient Available Cash, if any.

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       Amounts payable as Equalization Payments shall be treated as guaranteed
payments within the meaning of Code Section 707(c), shall be considered an
expense of the Joint Sales Company for income tax purposes and an expense or
capital item for financial reporting purposes, as the case may be, and shall not
be considered a distribution of money that would reduce the Capital Account of
the Member to which such distribution is made. In the event Equalization
Payments are due and owing to MBX and ADM Polymer Corporation on any
Equalization Payment Date that there is insufficient Available Cash to pay all
then owing Equalization Payments, Equalization Payments shall be made to MBX and
ADM Polymer Corporation pro rata based on the amount each is owed, respectively,
as a percentage of the total amount owed to both of MBX and ADM Polymer
Corporation.

       "EQUALIZATION PERIOD" means in the case of (i) the first Equalization
Payment, the period from the Equalization Date to the Business Day immediately
preceding the first Equalization Distribution Date, or (ii) in the case of any
subsequent Equalization Payment, the period from the last Equalization
Distribution Date through the Business Day immediately preceding the pending
Equalization Distribution Date.

       "FIRM OFFER" shall have the meaning set forth in Section 10.4(a) hereof.

       "FIRST COMMERCIAL SALE" shall have the meaning set forth in the
Commercial Alliance Agreement.

       "FISCAL QUARTER" means (i) the period commencing on the Effective Date
and ending on September 30, 2006, (ii) any subsequent three-month period
commencing on each of July 1, October 1, January 1 and April 1 and ending on the
last date before the next such date and (iii) the period commencing on the
immediately preceding January 1, April 1, July 1, or October 1, as the case may
be, and ending on the date on which all Property is distributed to the Members
pursuant to Section 12 hereof.

       "FISCAL YEAR" means (i) the period commencing on the Effective Date and
ending on December 31, 2006, (ii) any subsequent twelve-month period commencing
on January 1st and ending on December 31st and (iii) the period commencing on
the immediately preceding January 1st and ending on the date on which all
Property is distributed to the Members pursuant to Section 12 hereof; provided,
however, that the Fiscal Year shall meet the requirements of Code Section 706.

       "GAAP" means generally accepted accounting principles in effect in the
United States of America from time to time.

       "GROSS ASSET VALUE" means with respect to any asset, the asset's adjusted
basis for federal income tax purposes, except as follows:

                     (i)    The initial Gross Asset Value of any asset
              contributed by a Member to the Company shall be the gross fair
              market value of such asset, as determined by the Board of
              Directors PROVIDED that the initial Gross Asset

*  CONFIDENTIAL TREATMENT REQUESTED

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<Page>

              Values of the assets contributed to the Company pursuant to
              Section 2.1 hereof shall be as set forth in such section;

                     (ii)   The Gross Asset Values of all Company assets shall
              be adjusted to equal their respective gross fair market values
              (taking Code Section 7701(g) into account), as determined by the
              Board of Directors as of the following times: (A) the acquisition
              of an additional interest in the Company by any new or existing
              Member in exchange for more than a DE MINIMIS Capital
              Contribution; (B) the distribution by the Company to a Member of
              more than a DE MINIMIS amount of Company property as consideration
              for an interest in the Company; and (C) the liquidation of the
              Company within the meaning of Regulations Section
              1.704-1(b)(2)(ii)(g), PROVIDED that an adjustment described in
              clauses (A) and (B) of this paragraph shall be made only if the
              Board of Directors reasonably determines that such adjustment is
              necessary to reflect the relative economic interests of the
              Members in the Company;

                     (iii)  The Gross Asset Value of any item of Company assets
              distributed to any Member shall be adjusted to equal the gross
              fair market value (taking Code Section 7701(g) into account) of
              such asset on the date of distribution as determined by the Board
              of Directors; and

                     (iv)   The Gross Asset Values of Company assets shall be
              increased (or decreased) to reflect any adjustments to the
              adjusted basis of such assets pursuant to Code Section 734(b) or
              Code Section 743(b), but only to the extent that such adjustments
              are taken into account in determining Capital Accounts pursuant to
              Regulations Section 1.704-1(b)(2)(iv)(m) and subparagraph (vi) of
              the definition of "PROFITS" and "LOSSES" or Section 3.3(c) hereof;
              provided, however, that Gross Asset Values shall not be adjusted
              pursuant to this subparagraph (iv) to the extent that an
              adjustment pursuant to subparagraph (ii) is required in connection
              with a transaction that would otherwise result in an adjustment
              pursuant to this subparagraph (iv).

If the Gross Asset Value of an asset has been determined or adjusted pursuant to
subparagraph (ii) or (iv), such Gross Asset Value shall thereafter be adjusted
by the Depreciation taken into account with respect to such asset, for purposes
of computing Profits and Losses.

       "JOINT SALES COMPANY" means the limited liability company formed pursuant
to this Agreement and the Certificate and the limited liability company
continuing the business of this Joint Sales Company in the event of dissolution
of the Joint Sales Company as herein provided.

       "LEDGER ACCOUNT" means with respect to ADM Polymer Corporation, the
Ledger Account maintained for the purpose of determining certain rights and
obligations of ADM Polymer Corporation, MBX and the Joint Sales Company pursuant
to this Agreement and the other Commercial Alliance Agreements, all in
accordance with the following provisions:

*  CONFIDENTIAL TREATMENT REQUESTED

                                       11
<Page>

                     (i)    To ADM Polymer Corporation's Ledger Account there
              shall be credited (A) the cost incurred by ADM Polymer Corporation
              to Construct the ADM Polymer Corporation Manufacturing Facility,
              as approved by the Steering Committee pursuant to Section 4.2.5 of
              the Commercial Alliance Agreement, (B) other capital expenditures
              funded by ADM Polymer Corporation and approved for application as
              a credit against the Ledger Account by the Steering Committee, and
              (C) any negative Net Cash Flow funded by ADM Polymer Corporation;

                     (ii)   To ADM Polymer Corporation's Ledger Account there
              shall be debited (A) the cost incurred by MBX to Construct the MBX
              Formulation Facility, as approved by the Steering Committee
              pursuant to Section 4.3.5 of the Commercial Alliance Agreement,
              (B) other capital expenditures funded by MBX and approved for
              application as a debit against the Ledger Account by the Steering
              Committee, and (C) Net Cash Flow distributed to ADM Polymer
              Corporation pursuant to Section 4.1.

       "LETTER OF INTENT" means a binding or non-binding letter of intent
between a Seller and a Third-Party Transferee regarding the sale of Offered
Units entered into after the Offer Period.

       "LICENSE FEE" has the meaning assigned to the term "License Fee" in the
Commercial Alliance Agreement.

       "LIQUIDATION PERIOD" has the meaning set forth in Section 12.7 hereof.

       "LIQUIDATOR" has the meaning set forth in Section 12.9(a) hereof.

       "LOAN AND SECURITY AGREEMENT" means the Loan and Security Agreement by
and between ADM Polymer Corporation and the Joint Sales Company entered into
simultaneously herewith.

       "LOSSES" has the meaning set forth in the definition of "PROFITS" and
"LOSSES."

       "MARKETING AND SALES MANAGER" means the Marketing and Sales Manager of
the Joint Sales Company.

       "MBX FORMULATION AGREEMENT" means the Formulation Agreement by and
between MBX and the Joint Sales Company entered into simultaneously herewith.

       "MBX FORMULATION FACILITY" means the facility constructed by MBX,
pursuant to the Commercial Alliance Agreement, to produce PHA Formulations
pursuant to the MBX Formulation Agreement

       "MBX MARGIN" has the meaning assigned to the term "Formulation Margin" in
the MBX Formulation Agreement.

*  CONFIDENTIAL TREATMENT REQUESTED

                                       12
<Page>

       "MEMBER" means any Person (i) who is referred to as such on Exhibit A to
this Agreement, or who has become a substituted Member pursuant to the terms of
this Agreement and (ii) who has not ceased to be a Member. "Members" means all
such Persons.

       "MEMBER NONRECOURSE DEBT" has the same meaning as the term "Member
nonrecourse debt" in Section 1.704-2(b)(4) of the Regulations.

       "MEMBER NONRECOURSE DEBT MINIMUM GAIN" means an amount, with respect to
each Member Nonrecourse Debt, equal to the Company Minimum Gain that would
result if such Member Nonrecourse Debt were treated as a Nonrecourse Liability,
determined in accordance with Section 1.704-2(i)(3) of the Regulations.

       "MEMBER NONRECOURSE DEDUCTIONS" has the same meaning as the term "Member
nonrecourse deductions" in Sections 1.704-2(i)(1) and 1.704-2(i)(2) of the
Regulations.

       "MBX" means Metabolix, Inc.

       "MBX SERVICES AGREEMENT" means an agreement entitled MBX Services
Agreement between MBX and the Joint Sales Company entered into simultaneously
herewith.

       "NET CASH FLOW" means the gross cash proceeds of the Joint Sales Company
less the portion thereof used to pay or establish reserves for all Joint Sales
Company expenses, debt payments, capital improvements, replacements, and
contingencies, all as determined by a unanimous vote of the Board of Directors.
"NET CASH FLOW" shall not be reduced by depreciation, amortization, cost
recovery deductions, or similar allowances, but shall be increased by any
reductions of reserves previously established pursuant to the first sentence of
this definition.

       "NONRECOURSE DEDUCTIONS" has the meaning set forth in Section
1.704-2(b)(1) of the Regulations.

       "NONRECOURSE LIABILITY" has the meaning set forth in Section
1.704-2(b)(3) of the Regulations.

       "OFFEREE" shall have the meaning set forth in Section 10.4 hereof.

       "OFFEROR" shall have the meaning set forth in Section 10.4(b) hereof.

       "OFFER NOTICE" shall have the meaning set forth in Section 10.4(a)
hereof.

       "OFFER PERIOD" shall have the meaning set forth in Section 10.4(d)
hereof.

       "OFFER PRICE" shall have the meaning set forth in Section 10.4(c) hereof.

       "OFFERED UNITS" shall have the meaning set forth in Section 10.4 hereof.

*  CONFIDENTIAL TREATMENT REQUESTED

                                       13
<Page>

       "OFFICERS" means the Marketing and Sales Manager, the Assistant Marketing
and Sales Manager, the Treasurer and the Secretary together with such other
officers of the Joint Sales Company the Board of Directors may designate. An
"Officer" means one of the above.

       "PARENT" means with respect to a Member, any Person "controlling" such
Member and not "controlled" by any other Person, as such terms within quotation
marks are defined within the definition of Affiliate herein.

       "PERCENTAGE INTEREST" means, with respect to any Member as of any date,
the ratio (expressed as a percentage) of the number of Units held by such Member
on such date to the aggregate Units held by all Members on such date. The
Percentage Interest of each Member immediately after the Effective Date is set
forth in Section 2.1 hereof.

       "PERMITTED TRANSFER" has the meaning set forth in Section 10.2 hereof.

       "PERSON" means any individual, partnership (whether general or limited),
limited liability company, corporation, trust, estate, association, nominee or
other entity.

       "PHA FORMULATIONS" shall have the meaning set forth in the Commercial
Alliance Agreement.

       "PHA MATERIAL" shall have the meaning set forth in the Commercial
Alliance Agreement.

       "PRELIMINARY NEGOTIATIONS" shall mean all negotiations between a Seller
and a Third-Party Transferee occurring prior to the time that the Seller and
Third-Party Transferee have entered into a Letter of Intent.

       "PROFITS" and "LOSSES" mean, for each Allocation Year, an amount equal to
the Joint Sales Company's taxable income or loss, as the case may be, for such
Allocation Year, determined in accordance with Code Section 703(a) (for this
purpose, all items of income, gain, loss, or deduction required to be stated
separately pursuant to Code Section 703(a)(1) shall be included in taxable
income or loss), with the following adjustments (without duplication):

                     (i)    Any income of the Joint Sales Company that is exempt
              from federal income tax and not otherwise taken into account in
              computing Profits or Losses pursuant to this definition of
              "PROFITS" and "LOSSES" shall be added to such taxable income or
              loss;

                     (ii)   Any expenditures of the Joint Sales Company
              described in Code Section 705(a)(2)(B) or treated as Code Section
              705(a)(2)(B) expenditures pursuant to Regulations Section
              1.704-1(b)(2)(iv)(i), and not otherwise taken into account in
              computing Profits or Losses pursuant to this definition of
              "Profits" and "Losses" shall be subtracted from such taxable
              income or loss;

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                                       14
<Page>

                     (iii)  In the event the Gross Asset Value of any Joint
              Sales Company asset is adjusted pursuant to subparagraphs (ii) or
              (iii) of the definition of Gross Asset Value, the amount of such
              adjustment shall be treated as an item of gain (if the adjustment
              increases the Gross Asset Value of the asset) or an item of loss
              (if the adjustment decreases the Gross Asset Value of the asset)
              from the disposition of such asset and shall be taken into account
              for purposes of computing Profits or Losses;

                     (iv)   Gain or loss resulting from any disposition of
              Property with respect to which gain or loss is recognized for
              federal income tax purposes shall be computed by reference to the
              Gross Asset Value of the Property disposed of, notwithstanding
              that the adjusted tax basis of such Property differs from its
              Gross Asset Value;

                     (v)    In lieu of the depreciation, amortization, and other
              cost recovery deductions taken into account in computing such
              taxable income or loss, there shall be taken into account
              Depreciation for such Allocation Year, computed in accordance with
              the definition of Depreciation;

                     (vi)   To the extent an adjustment to the adjusted tax
              basis of any Joint Sales Company asset pursuant to Code Section
              734(b) is required, pursuant to Regulations Section
              1.704-1(b)(2)(iv)(m)(4), to be taken into account in determining
              Capital Accounts as a result of a distribution other than in
              liquidation of a Member's interest in the Joint Sales Company, the
              amount of such adjustment shall be treated as an item of gain (if
              the adjustment increases the basis of the asset) or loss (if the
              adjustment decreases such basis) from the disposition of such
              asset and shall be taken into account for purposes of computing
              Profits or Losses; and

                     (vii)  Notwithstanding any other provision of this
              definition, any items which are specially allocated pursuant to
              Section 3.3 or Section 3.4 hereof shall not be taken into account
              in computing Profits or Losses.

       The amounts of the items of Joint Sales Company income, gain, loss or
deduction available to be specially allocated pursuant to Sections 3.3 and 3.4
hereof shall be determined by applying rules analogous to those set forth in
subparagraphs (i) through (vi) above.

       "PROMISSORY NOTE" means the Promissory Note made by the Joint Sales
Company to the order of ADM Polymer Corporation entered into simultaneously
herewith.

       "PROPERTY" means all real and personal property acquired by the Joint
Sales Company, including cash, and any improvements thereto, and shall include
both tangible and intangible property.

       "PURCHASE OFFER" shall have the meaning set forth in Section 10.4(b)
hereof.

*  CONFIDENTIAL TREATMENT REQUESTED

                                       15
<Page>

       "PURCHASER" shall have the meaning set forth in Section 10.4(a) hereof.

       "RECONSTITUTION PERIOD" has the meaning set forth in Section 12.1(b)
hereof.

       "REGULATIONS" means the Income Tax Regulations, including Temporary
Regulations, promulgated under the Code, as such regulations are amended from
time to time.

       "REGULATORY ALLOCATIONS" has the meaning set forth in Section 3.4 hereof.

       "SECRETARY" means the Secretary of the Joint Sales Company.

       "SELLER" shall have the meaning set forth in Section 10.4 hereof.

       "SECURITIES ACT" means the Securities Act of 1933, as amended.

       "STEERING COMMITTEE" shall have the meaning set forth in the Commercial
Alliance Agreement.

       "TAX MATTERS MEMBER" has the meaning set forth in Section 8.3(a) hereof.

       "TECHNOLOGY ALLIANCE AGREEMENT" means the Technology Alliance Agreement
by and between ADM Polymer Corporation and MBX entered into November 3, 2004.

       "TECHNOLOGY MANAGER" means the Technology Manager of the Joint Sales
Company.

       "THIRD-PARTY TRANSFEREE" shall have the meaning set forth in Section
10.4(i) hereof.

       "TRANSFER" means, as a noun, any voluntary or involuntary transfer, sale,
pledge or hypothecation or other disposition and, as a verb, voluntarily or
involuntarily to transfer, sell, pledge or hypothecate or otherwise dispose of.

       "TRANSFER OFFER" shall have the meaning set forth in Section 10.4(c)
hereof.

       "TREASURER" means the Treasurer of the Joint Sales Company.

       "UNITS" or "UNIT" means an ownership interest in the Joint Sales Company
represented by a certificate in the form of Exhibit B attached hereto and
bearing the legend required by Section 10.9 hereof, representing a Capital
Contribution of *, including the Voting Percentage noted on the
certificate therefor as well as any and all benefits to which the holder of such
Units may be entitled as provided in this Agreement, together with all
obligations of such Person to comply with the terms and provisions of this
Agreement.

       "UNSOLICITED OFFER" shall have the meaning set forth in Section 10.4(b)
hereof.

       "VOTING PERCENTAGE" means the percentage set opposite each Member's name
in Section 2.1, and unless otherwise explicitly set forth herein to the
contrary, any matters

*  CONFIDENTIAL TREATMENT REQUESTED

                                       16
<Page>

requiring the Members to vote, approve, or take any other action shall be
determined by a majority in Voting Percentage of the Members.

       "WHOLLY OWNED AFFILIATE" of any Person means (i) an Affiliate of such
Person, one hundred percent (100%) of the voting stock or beneficial ownership
of which is owned by such Person, either directly or indirectly; (ii) an
Affiliate of such Person, and such Affiliate owns one hundred percent (100%) of
the voting stock or beneficial ownership of such Person, either directly or
indirectly; or (iii) an Affiliate of such Person, where a Person owns one
hundred percent (100%) of the voting stock or beneficial ownership of such
Affiliate and such Person, either directly or indirectly.

                    SECTION 2: MEMBERS' CAPITAL CONTRIBUTIONS

              2.1    ORIGINAL CAPITAL CONTRIBUTIONS.

       The name, address, original Capital Contribution, and initial Percentage
Interest of each of the Members is as follows:

<Table>
<Caption>
                                      Original Capital                      Percentage        Voting
Names and Address                     Contribution                           Interest         Percentage
-----------------                     ------------                          ----------        ----------
<S>                                   <C>                                   <C>               <C>
Metabolix Inc.                        The property described                50%               50%
21 Erie Street                         in Exhibit A attached hereto
Cambridge, MA 02139

ADM Polymer Corporation               The property described                50%               50%
4666 Faries Parkway                   in Exhibit A attached hereto
Decatur, Illinois 62526
</Table>

              2.2    CONTRIBUTIONS.

              Pursuant to Section 2.1 hereof, each Member agrees to contribute
to the Joint Sales Company on the date hereof, the amount of money or the
property set opposite such Member's name on the attached Exhibit A.

              2.3    ADDITIONAL CAPITAL CONTRIBUTIONS.

              A Member may make Additional Capital Contributions only with the
written consent of all Members, in which event the Joint Sales Company shall
issue to the contributing Member additional Units of an amount to be unanimously
agreed by the Members.

*  CONFIDENTIAL TREATMENT REQUESTED

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<Page>

                             SECTION 3: ALLOCATIONS

              3.1    PROFITS.

              After giving effect to the special allocations set forth in
Sections 3.3 and 3.4, Profits for any Allocation Year on or prior to the
Equalization Date shall be allocated to ADM Polymer Corporation, and Profits for
any Allocation Year after the Equalization Date shall be allocated to the
Members in proportion to their Percentage Interests.

              3.2    LOSSES.

              After giving effect to the special allocations set forth in
Sections 3.3 and 3.4 and subject to Section 3.5, Losses for any Allocation Year
on or prior to the Equalization Date shall be allocated to ADM Polymer
Corporation, and Losses for any Allocation Year after the Equalization Date
shall be allocated to the Members in proportion to their Percentage Interests.

              3.3    SPECIAL ALLOCATIONS.

              The following special allocations shall be made in the following
order:

              (a)    MINIMUM GAIN CHARGEBACK. Except as otherwise provided in
Section 1.704-2(f) of the Regulations, notwithstanding any other provision of
this Section 3, if there is a net decrease in Company Minimum Gain during any
Allocation Year, each Member shall be specially allocated items of Joint Sales
Company income and gain for such Allocation Year (and, if necessary, subsequent
Allocation Years) in an amount equal to such Member's share of the net decrease
in Company Minimum Gain, determined in accordance with Regulations Section
1.704-2(g). Allocations pursuant to the previous sentence shall be made in
proportion to the respective amounts required to be allocated to each Member
pursuant thereto. The items to be so allocated shall be determined in accordance
with sections 1.704-2(f) (6) and 1.704-2(j) (2) of the Regulations. This Section
3.3(a) is intended to comply with the minimum gain chargeback requirement in
Section 1.704-2(f) of the Regulations and shall be interpreted consistently
therewith.

              (b)    MEMBER MINIMUM GAIN CHARGEBACK. Except as otherwise
provided in Section 1.704-2(i) (4) of the Regulations, notwithstanding any other
provision of this Section 3, if there is a net decrease in Member Nonrecourse
Debt Minimum Gain attributable to a Member Nonrecourse Debt during any
Allocation Year, each Member who has a share of the Member Nonrecourse Debt
Minimum Gain attributable to such Member Nonrecourse Debt, determined in
accordance with Section 1.704-2(i) (5) of the Regulations, shall be specially
allocated items of Joint Sales Company income and gain for such Allocation Year
(and, if necessary, subsequent Allocation Years) in an amount equal to such
Member's share of the net decrease in Member Nonrecourse Debt, determined in
accordance with Regulations Section 1.704-2(i) (4). Allocations pursuant to the
previous sentence shall be made in proportion to the respective amounts required
to be allocated to each Member pursuant thereto. The items to be so allocated
shall be determined in accordance with Sections 1.704-2(i) (4) and 1.704-2(j)
(2) of the Regulations. This Section 3.3(b) is intended to comply with the
minimum gain

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<Page>

chargeback requirement in Section 1.704-2(i) (4) of the Regulations and shall be
interpreted consistently therewith.

              (c)    QUALIFIED INCOME OFFSET. In the event any Member
unexpectedly receives any adjustments, allocations, or distributions described
in Sections 1.704-1(b)(2)(ii)(d)(4), 1.704-1(b)(2)(ii)(d)(5), or
1.704-1(b)(2)(ii)(d)(6) of the Regulations, items of Joint Sales Company income
and gain shall be specially allocated to such Member in an amount and manner
sufficient to eliminate, to the extent required by the Regulations, the Adjusted
Capital Account Deficit of the Member as quickly as possible, provided that an
allocation pursuant to this Section 3.3(c) shall be made only if and to the
extent that the Member would have an Adjusted Capital Account Deficit after all
other allocations provided for in this Section 3 have been tentatively made as
if this Section 3.3(c) were not in the Agreement.

              (d)    GROSS INCOME ALLOCATION. In the event any Member has a
deficit Capital Account at the end of any Allocation Year which is in excess of
the sum of (i) the amount such Member is obligated to restore pursuant to the
penultimate sentences of Regulations Sections 1.704-2(g)(1) and 1.704-2(i)(5),
each such Member shall be specially allocated items of Joint Sales Company
income and gain in the amount of such excess as quickly as possible, provided
that an allocation pursuant to this Section 3.3(d) shall be made only if and to
the extent that such Member would have a deficit Capital Account in excess of
such sum after all other allocations provided for in this Section 3 have been
made as if Section 3.3(c) and this Section 3.3(d) were not in the Agreement.

              (e)    NONRECOURSE DEDUCTIONS. Nonrecourse Deductions for any
Allocation Year shall be specially allocated to the Members in proportion to
their respective Percentage Interests.

              (f)    MEMBER NONRECOURSE DEDUCTIONS. Any Member Nonrecourse
Deductions for any Allocation Year shall be specially allocated to the Member
who bears the economic risk of loss with respect to the Member Nonrecourse Debt
to which such Member Nonrecourse Deductions are attributable in accordance with
Regulations Section 1.704-2(i) (1).

              (g)    SECTION 754 ADJUSTMENTS. To the extent an adjustment to the
adjusted tax basis of any Joint Sales Company asset, pursuant to Code Section
734(b) or Code Section 743(b) is required, pursuant to Regulations Section
1.704-1(b)(2)(iv)(m)(2) or 1.704-1(b)(2)(iv)(m)(4), to be taken into account in
determining Capital Accounts as the result of a distribution to a Member in
complete liquidation of such Member's interest in the Joint Sales Company, the
amount of such adjustment to Capital Accounts shall be treated as an item of
gain (if the adjustment increases the basis of the asset) or loss (if the
adjustment decreases such basis) and such gain or loss shall be specially
allocated to the Members in accordance with their interests in the Joint Sales
Company in the event Regulations Section 1.704-1(b)(2)(iv)(m)(2) applies, or to
the Member to whom such distribution was made in the event Regulations Section
1.704-1(b)(2)(iv)(m)(4) applies.

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<Page>

              3.4    CURATIVE ALLOCATIONS.

              The allocations set forth in Sections 3.3(a), 3.3(b), 3.3(c),
3.3(d), 3.3(e), 3.3(f), 3.3(g) and 3.5 (the "REGULATORY ALLOCATIONS") are
intended to comply with certain requirements of the Regulations. It is the
intent of the Members that, to the extent possible, all Regulatory Allocations
shall be offset either with other Regulatory Allocations or with special
allocations of other items of Joint Sales Company income, gain, loss or
deduction pursuant to this Section 3.4. Therefore, notwithstanding any other
provision of this Section 3 (other than the Regulatory Allocations), the Board
of Directors may make with the unanimous approval of the Board of Directors such
offsetting special allocations of Joint Sales Company income, gain, loss or
deduction in whatever manner it determines appropriate so that, after such
offsetting allocations are made, each Member's Capital Account balance is, to
the extent possible, equal to the Capital Account balance such Member would have
had if the Regulatory Allocations were not part of the Agreement and all Joint
Sales Company items were allocated pursuant to Sections 3.1 and 3.2.

              3.5    LOSS LIMITATION.

              Losses allocated pursuant to Section 3.2 hereof shall not exceed
the maximum amount of Losses that can be allocated without causing any Member to
have an Adjusted Capital Account Deficit at the end of any Allocation Year. In
the event some but not all of the Members would have Adjusted Capital Account
Deficits as a consequence of an allocation of Losses pursuant to Section 3.2
hereof, the limitation set forth in this Section 3.5 shall be applied on a
Member by Member basis and Losses not allocable to any Member as a result of
such limitation shall be allocated to the other Members in accordance with the
positive balances in such Member's Capital Accounts so as to allocate the
maximum permissible Losses to each Member under Section 1.704-1(b)(2)(ii)(d) of
the Regulations.

              3.6    OTHER ALLOCATION RULES.

              (a)    For purposes of determining the Profits, Losses, or any
other items allocable to any period, Profits, Losses, and any such other items
shall be determined on a daily, monthly, or other basis, as determined by the
Board of Directors using any permissible method under Code Section 706 and the
Regulations thereunder.

              (b)    The Members are aware of the income tax consequences of the
allocations made by this Section 3 and hereby agree to be bound by the
provisions of this Section 3 in reporting their shares of Joint Sales Company
income and loss for income tax purposes.

              (c)    Solely for purposes of determining a Member's proportionate
share of the "excess nonrecourse liabilities" of the Joint Sales Company within
the meaning of Regulations Section 1.752-3(a) (3), the Members' interests in
Joint Sales Company profits are in proportion to their Percentage Interests.

*  CONFIDENTIAL TREATMENT REQUESTED

                                       20
<Page>

              To the extent permitted by Section 1.704-2(h) (3) of the
Regulations, the Directors shall endeavor to treat distributions of Net Cash
Flow as having been made from the proceeds of a Nonrecourse Liability or a
Member Nonrecourse Debt only to the extent that such distributions would not
cause or increase an Adjusted Capital Account Deficit for any Member.

              3.7    TAX ALLOCATIONS: CODE SECTION 704(c).

              In accordance with Code Section 704(c) and the Regulations
thereunder, income, gain, loss, and deduction with respect to any Property
contributed to the capital of the Joint Sales Company shall, solely for tax
purposes, be allocated among the Members so as to take account of any variation
between the adjusted basis of such Property to the Joint Sales Company for
federal income tax purposes and its initial Gross Asset Value (computed in
accordance with the definition of Gross Asset Value) using the remedial method
to the Regulations under Code Section 704(c).

              In the event the Gross Asset Value of any Joint Sales Company
asset is adjusted pursuant to subparagraph (ii) of the definition of Gross Asset
Value, subsequent allocations of income, gain, loss, and deduction with respect
to such asset shall take account of any variation between the adjusted basis of
such asset for federal income tax purposes and its Gross Asset Value in the same
manner as under Code Section 704(c) and the Regulations thereunder.

              Any elections or other decisions relating to such allocations
shall be made by the Board of Directors in any manner that reasonably reflects
the purpose and intention of this Agreement. Allocations pursuant to this
Section 3.6 are solely for purposes of federal, state, and local taxes and shall
not affect, or in any way be taken into account in computing, any Member's
Capital Account or share of Profits, Losses, other items, or distributions
pursuant to any provision of this Agreement.

                            SECTION 4: DISTRIBUTIONS

              4.1    NET CASH FLOW.

              Except as otherwise provided in Section 12 hereof, on or prior to
the Equalization Date, Net Cash Flow, if any, shall be distributed not later
than the thirtieth day after the end of each Fiscal Quarter to ADM Polymer
Corporation. Except as otherwise provided in Section 12 hereof or by the Board
of Directors, after the Equalization Date, Net Cash Flow, if any, shall be
distributed not later than the thirtieth day after the end of each Fiscal
Quarter to the Members following the Equalization Payments, if any, described in
Section 6.13 hereof, in proportion to their Percentage Interests.

              4.2    AMOUNTS WITHHELD.

              All amounts withheld pursuant to the Code or any provision of any
state, local or foreign tax law with respect to any payment, distribution or
allocation to the Joint Sales Company or the Members shall be treated as amounts
paid or distributed, as the case may be,

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to the Members with respect to which such amount was withheld pursuant to this
Section 4.2 for all purposes under this Agreement. The Joint Sales Company is
authorized to withhold from payments and distributions, or with respect to
allocations to the Members, and to pay over to any federal, state and local
government or any foreign government, any amounts required to be so withheld
pursuant to the Code or any provisions of any other federal, state or local law
or any foreign law, and shall allocate any such amounts to the Members with
respect to which such amount was withheld.

              4.3    [RESERVED]

              4.4    LIMITATIONS ON DISTRIBUTIONS.

              (a)    The Joint Sales Company shall make no distributions to the
Members except (i) as provided in this Section 4 and Section 12 hereof, or (ii)
as agreed to by all of the Members.

              (b)    A Member may not receive a distribution from the Joint
Sales Company to the extent that, such distribution would violate Sections
18-607 or 18-804 of the Act.

                              SECTION 5: MANAGEMENT

              5.1    DIRECTORS; BOARD OF DIRECTORS.

              (a)    The management of the Joint Sales Company shall be vested
in the Board of Directors (the "BOARD OF DIRECTORS") designated by the Members
as provided in Section 5.1(c) hereof.

              (b)    The number of Directors on the Board of Directors shall be
four (4). The initial Directors of the Joint Sales Company shall be as set forth
on Exhibit C hereto.

              (c)    A Director shall remain in office until removed by the
Member designating such Director. MBX shall designate two (2) Directors, and ADM
Polymer Corporation shall designate two (2) Directors. Members shall designate
Directors with respect to any Director other than the initial Directors listed
on Exhibit C hereto, by delivering to the Joint Sales Company their written
statement designating their Director or Directors and setting forth such
Director's or Directors' business address and telephone number. The Members, by
signing this Agreement, hereby designate the Persons identified on Exhibit C
hereto as Directors of the Joint Sales Company until their successors are
designated, each such Director being deemed designated by the Member set forth
opposite such Director indicated on Exhibit C hereto.

              (d)    A Director may be removed at any time, with or without
cause, by the written notice of the Member that designated such Director,
delivered to the Joint Sales Company, demanding such removal and designating the
Person who shall fill the position of the removed Director.

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              (e)    If any Director dies, resigns or is otherwise unable to
serve as such or is removed from office by the Member that designated such
Director, the appropriate Member shall promptly designate a successor to such
Director. A Director chosen to fill a vacancy shall be designated by the Member
whose previously designated Director shall have been removed or shall have
resigned.

              (f)    Each Director shall have one (1) vote. Except as otherwise
provided in this Agreement, the Board of Directors shall act by the affirmative
vote of a majority of a quorum.

              (g)    Each Director shall perform his duties as a Director in
good faith, in a manner he reasonably believes to be in the best interests of
the Joint Sales Company, and with such care as an ordinarily prudent person in a
like position would use under similar circumstances. A person who so performs
his duties shall not have any liability by reason of being or having been a
Director of the Joint Sales Company.

              (h)    The Board of Directors shall have the power to delegate
authority to such committees of Directors, Officers, employees, agents and
representatives of the Joint Sales Company as it may from time to time deem
appropriate in accordance with Section 5.7 below. Any delegation of authority to
take any action must be approved in the same manner as would be required for the
Board of Directors to approve such action directly.

              (i)    A Director shall not be liable under a judgment, decree or
order of court, or in any other manner, for a debt, obligation or liability of
the Joint Sales Company.

              (j)    The Chairman shall be a Director and shall hold office for
a period of one Fiscal Year. The Chairman shall be appointed on an alternating
basis, first as directed in writing by ADM Polymer Corporation, and then as
directed in writing by MBX. The Chairman may be removed at any time, with or
without cause, by the written notice of the Member that designated such
Chairman, delivered to the Joint Sales Company, demanding such removal and
designating the Person who shall fill the position of the removed Chairman. The
duties of the Chairman shall be to direct meetings of the Board of Directors.
The initial Chairman shall be as indicated on Exhibit C hereto.

       5.2    MEETINGS OF THE BOARD OF DIRECTORS.

              (a)    The Board of Directors shall hold regular meetings no less
frequently than once every Fiscal Quarter and shall establish meeting times,
dates and places and requisite notice requirements (not shorter than those
provided in Section 5.2(b)) and adopt rules or procedures consistent with the
terms of this Agreement. Unless otherwise approved by the Board of Directors,
each regular meeting of the Board of Directors will be held at a location
specified on an alternating basis first, by those Directors designated by ADM
Polymer Corporation, next by those Directors designated by MBX, etc. for the
convenience of the Directors specifying the location. If the Directors
designated by a Member and having the right to specify the location do not so
specify, the meeting will be held at the Joint Sales Company's principal place
of business. At such meetings the Board of Directors shall transact

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such business as may properly be brought before the meeting, whether or not
notice of such meeting referenced the action taken at such meeting. At all
meetings of the Board of Directors, the participation of at least one Director
appointed by each of ADM Polymer Corporation and MBX shall constitute a quorum.
Each Director shall have one vote on all matters before the Board of Directors;
provided, however, that the Director appointed by each of ADM Polymer
Corporation and MBX present at any meeting shall have the authority to cast the
votes of any of such Party's appointed Directors who are absent from the
meeting. The act of a majority of the Directors present at any meeting at which
a quorum is present shall be the act of the Board of Directors, unless by
express provision of the Act, or of this Agreement, a different vote is
required, in which case such express provision shall govern and control. In the
absence of a quorum, a majority of the Directors present at any meeting may,
without notice other than announcement at the meeting, adjourn such meeting from
time to time until a quorum is present. A Director may appoint in writing an
alternate to act in such Director's absence at any meetings of the Board of
Directors.

              (b)    Special meetings of the Board of Directors may be called by
any Director. Notice of each such meeting shall be given to each Director on the
Board of Directors by telephone, telecopy, telegram, or similar method, or sent
by first-class mail (in each case, notice shall be given at least three (3)
weeks before the time of the meeting, unless a longer notice period is
established by the Board of Directors). Each such notice shall state (i) the
time, date, place (which shall be at the principal office of a Member other than
the Member who designated the Director calling such meeting unless otherwise
agreed to by all Directors) or other means of conducting such meeting and (ii)
the purpose of the meeting to be so held. No actions other than those specified
in the notice may be considered at any special meeting unless unanimously
approved by the Directors. Any Director may waive notice of any meeting in
writing before, at, or after such meeting. The attendance of a Director at a
meeting shall constitute a waiver of notice of such meeting, except when a
Director attends a meeting for the express purpose of objecting, and does in
fact object, to the transaction of any business on grounds that the meeting was
not properly called.

              (c)    Any action required to be taken at a meeting of the Board
of Directors, or any action that may be taken at a meeting of the Board of
Directors, may be taken at a meeting held by means of conference telephone or
other communications equipment by means of which all persons participating in
the meeting can hear each other. Participation in such a meeting shall
constitute presence in person at such meeting.

              (d)    Notwithstanding anything to the contrary in this Section
5.2, the Board of Directors may take without a meeting any action that may be
taken by the Board of Directors under this Agreement if such action is approved
by the unanimous written consent of the Directors.

       5.3    BOARD OF DIRECTORS POWERS.

              (a)    Except as otherwise provided in this Agreement, all powers
to control and manage the Business and affairs of the Joint Sales Company shall
be exclusively vested in the Board of Directors and the Board of Directors may
exercise all powers of the Joint Sales

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Company and do all such lawful acts as are not by statute, the Certificate or
this Agreement directed or required to be exercised or done by the Members and
in so doing shall have the right and authority to take all actions which the
Board of Directors deems necessary, useful or appropriate for the management and
conduct of the Business, including exercising the following specific rights and
powers:

                     (i)       Conduct its business, carry on its operations and
          have and exercise the powers granted by the Act in any state,
          territory, district or possession of the United States, or in any
          foreign country which may be necessary or convenient to effect any or
          all of the purposes for which it is organized;

                     (ii)      Acquire by purchase, lease, or otherwise any real
          or personal property which may be necessary, convenient, or incidental
          to the accomplishment of the purposes of the Joint Sales Company;

                     (iii)     Operate, maintain, finance, improve, construct,
          own, grant operations with respect to, sell, convey, assign, mortgage,
          and lease any real estate and any personal property necessary,
          convenient, or incidental to the accomplishment of the purposes of the
          Joint Sales Company;

                     (iv)      Execute (but not to the exclusion of any Officer
          having such power) any and all agreements, contracts, documents,
          certifications, and instruments necessary or convenient in connection
          with the management, maintenance, and operation of the Business, or in
          connection with managing the affairs of the Joint Sales Company,
          including, executing amendments to this Agreement and the Certificate
          in accordance with the terms of this Agreement, both as Directors and,
          if required, as attorney-in-fact for the Members pursuant to any power
          of attorney granted by the Members to the Directors. Simultaneously
          with the execution of this Agreement, one or more of the Directors
          shall execute the Commercial Alliance Agreements on behalf of the
          Joint Sales Company;

                     (v)       Borrow money and issue evidences of indebtedness
          necessary, convenient, or incidental to the accomplishment of the
          purposes of the Joint Sales Company, and secure the same by mortgage,
          pledge, or other lien on any Joint Sales Company assets;

                     (vi)      Execute, in furtherance of any or all of the
          purposes of the Joint Sales Company, any deed, lease, mortgage, deed
          of trust, mortgage note, promissory note, bill of sale, contract, or
          other instrument purporting to convey or encumber any or all of the
          Joint Sales Company assets;

                     (vii)     Prepay in whole or in part, refinance, recast,
          increase, modify, or extend any liabilities affecting the assets of
          the Joint Sales Company and in connection therewith execute any
          extensions or renewals of encumbrances on any or all of such assets;

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                     (viii)    Manage and distribute funds to the Members by way
          of cash income, return of capital, or otherwise, all in accordance
          with the provisions of this Agreement, and perform all matters in
          furtherance of the objectives of the Joint Sales Company or this
          Agreement;

                     (ix)      Contract on behalf of the Joint Sales Company for
          the employment and services or employees and/or independent
          contractors, such as lawyers and accountants, and delegate to such
          Persons the duty to manage or supervise any of the assets or
          operations of the Joint Sales Company;

                     (x)       Engage in any kind of activity and perform and
          carry out contracts of any kind (including contracts of insurance
          covering risks to Joint Sales Company assets and Director liability)
          necessary or incidental to, or in connection with, the accomplishment
          of the purposes of the Joint Sales Company, as may be lawfully carried
          on or performed by a limited liability company under the laws of each
          state in which the Joint Sales Company is then formed or qualified;

                     (xi)      Take, or refrain from taking, all actions, not
          expressly proscribed or limited by this Agreement, as may be necessary
          or appropriate to accomplish the purposes of the Joint Sales Company;

                     (xii)     Institute, prosecute, defend, settle, compromise,
          and dismiss lawsuits or other judicial or administrative proceedings
          brought on or in behalf of, or against, the Joint Sales Company, the
          Members or any Director in connection with activities arising out of,
          connected with, or incidental to this Agreement, and to engage counsel
          or others in connection therewith;

                     (xiii)    Purchase, take, receive, subscribe for or
          otherwise acquire, own, hold, vote, use, employ, sell, mortgage, lend,
          pledge, or otherwise dispose of, and otherwise use and deal in and
          with, shares or other interests in or obligations of domestic or
          foreign corporations, associations, general or limited partnerships,
          other limited liability companies, or individuals or direct or
          indirect obligations of the United States or of any government, state,
          territory, government district or municipality or of any
          instrumentality of any of them;

                     (xiv)     Indemnify a Member or Director or former Member
          or Director, and to make any other indemnification that is authorized
          by this Agreement in accordance with the Act; provided the Board of
          Directors unanimously agrees on such indemnification.

          (b)   The Board of Directors shall appoint and/or approve the Officers
in accordance with Section 5.7 and will establish policies and guidelines for
the hiring of employees to permit the Joint Sales Company to act as an operating
company with respect to its Business. The Board of Directors may adopt
appropriate management incentive plans and

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employee benefit plans. The Officers of the Joint Sales Company shall be
responsible for conducting, in the name of, and on behalf of, the Joint Sales
Company, the day-to-day business and affairs of the Joint Sales Company.

       5.4    DUTIES AND OBLIGATIONS OF THE BOARD OF DIRECTORS.

                  (a)     The Board of Directors shall cause the Joint Sales
Company to conduct its business and operations separate and apart from that of
any Member or Director or any of its Affiliates, including, without limitation,
(i) segregating Joint Sales Company assets and not allowing funds or other
assets of the Joint Sales Company to be commingled with the funds or other
assets of, held by, or registered in the name of, any Member or Director or any
of its Affiliates, (ii) maintaining books and financial records of the Joint
Sales Company separate from the books and financial records of any Member or
Director and its Affiliates, and observing all Joint Sales Company procedures
and formalities, including, without limitation, maintaining minutes of Joint
Sales Company meetings and acting on behalf of the Joint Sales Company only
pursuant to due authorization of the Members, (iii) causing the Joint Sales
Company to pay its liabilities from assets of the Joint Sales Company, and (iv)
causing the Joint Sales Company to conduct its dealings with third parties in
its own name and as a separate and independent entity.

             (b)     The Board of Directors shall take all actions which may be
necessary or appropriate (i) for the continuation of the Joint Sales Company's
valid existence as a limited liability company under the laws of the State of
Delaware and of each other jurisdiction in which such existence is necessary to
protect the limited liability of the Members or to enable the Joint Sales
Company to conduct the business in which it is engaged and (ii) for the
accomplishment of the Joint Sales Company's purposes, including the acquisition,
development, maintenance, preservation, and operation of Property in accordance
with the provisions of this Agreement and applicable laws and regulations.

             (c)     It is expressly agreed by the Members that no Director
shall be liable to the Joint Sales Company or any Member for such Director's
good faith reliance on any provision of this Agreement.

       5.5    REIMBURSEMENTS.

              Except as otherwise provided in a Commercial Alliance Agreement,
the Members and Directors shall be reimbursed for certain expenditures as
provided herein. The Joint Sales Company shall reimburse the Members and
Directors for all expenses incurred and paid by any of them in the organization
of the Joint Sales Company and as authorized by the Joint Sales Company, in the
conduct of the Business, including, but not limited to, expenses of maintaining
an office, telephones, travel, office equipment and secretarial and other
personnel as may reasonably be attributable to the Joint Sales Company. Each
Member that is party to any contract or agreement with the Joint Sales Company
(including but not limited to the Commercial Alliance Agreements) shall be
reimbursed amounts specified or reimbursable thereunder pursuant to the terms
thereof. Such expenses shall not include any expenses incurred in connection
with a Member's or Directors' exercise of its rights as a Member or a

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Director apart from the authorized conduct of the Business. The unanimous
determination of the Board of Directors as to which expenses are allocated to
and reimbursed as a result of the Joint Sales Company's activities or business
and the amount of such expenses shall be conclusive. Except as otherwise
expressly provided herein, such reimbursement shall be treated as expenses of
the Joint Sales Company and shall not be deemed to constitute distributions to
any Member of profit, loss or capital of the Joint Sales Company.

       5.6    INDEMNIFICATION OF THE DIRECTORS AND OFFICERS.

              (a)    Unless otherwise provided in Section 5.6(d) hereof, the
Joint Sales Company, its receiver, or its trustee (in the case of its receiver
or trustee, to the extent of the Property) shall indemnify, save harmless, and
pay all judgments and claims against any Director or Officer relating to any
liability or damage incurred by reason *

              (b)    Unless otherwise provided in Section 5.6(d) hereof, in the
event of any *

              (c)    Unless otherwise provided in Section 5.6(d) hereof, the
Joint Sales Company shall *

              (d)    Notwithstanding the provisions of Sections 5.6(a), 5.6(b)
and 5.6(c) above, such Sections shall be enforced only to the maximum extent
permitted by law and no Director or Officer shall be indemnified from any
liability for the fraud, intentional misconduct, gross negligence or a knowing
violation of the law which was material to the cause of action.

              (e)    The obligations of the Joint Sales Company set forth in
this Section 5.6 are expressly intended to create third party beneficiary rights
of each of the Directors or Officers and any Member is authorized, on behalf of
the Joint Sales Company, to give written confirmation to any Director or Officer
of the existence and extent of the Joint Sales Company's obligations to such
Director or Officer hereunder.

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       5.7    APPOINTMENT OF OFFICERS, AGENTS AND REPRESENTATIVES:

              (a)    The Board of Directors shall appoint and remove persons
from the following offices, where indicated as directed by the appropriate
Member:

                         (i)      The Marketing and Sales Manager. The Marketing
              and Sales Manager shall be appointed as directed by MBX, subject
              to the approval of the Board of Directors. The Marketing and Sales
              Manager may be removed by the Board of Directors, only at the
              direction of MBX, and may be removed with or without cause. The
              duties of the Marketing and Sales Manager shall be to coordinate
              and manage the day to day Business of the Joint Sales Company as
              it relates to the marketing and sale of the Products. He shall
              consult frequently and work closely with the Board of Directors to
              ensure that the Board of Directors is aware and approves of all
              significant actions taken by the Marketing and Sales Manager. The
              Marketing and Sales Manager shall not be a "manager" within the
              meaning of the Act;

                         (ii)     The Assistant Marketing and Sales Manager. The
              Assistant Marketing and Sales Manager shall be appointed as
              directed by ADM Polymer Corporation, subject to the approval of
              the Board of Directors. The Assistant Marketing and Sales manager
              may be removed by the Board of Directors, only at the direction of
              ADM Polymer Corporation, and may be removed with or without cause.
              The duties of the Assistant Marketing and Sales manager shall be
              to assist the Marketing and Sales Manager in coordinating and
              managing the day to day Business of the Joint Sales Company as it
              relates to the marketing and sales of the Products. The Assistant
              Marketing and Sales Manager shall not be a "manager" within the
              meaning of the Act.

                         (iii)    The Treasurer. The Treasurer shall be
              appointed as directed by ADM Polymer Corporation, subject to the
              approval of the Board of Directors. The Treasurer may be removed
              by the Board of Directors, only at the direction of ADM Polymer
              Corporation, and may be removed with or without cause. The
              Treasurer shall have custody of the Joint Sales Company's funds
              and shall keep full and accurate accounts of receipts and
              disbursements in books belonging to the Joint Sales Company and
              shall deposit or cause to be deposited moneys or other valuable
              effects in the name and to the credit of the Joint Sales Company
              in such depositories as may be designated by the Board of
              Directors. The Treasurer shall also maintain adequate records of
              all assets, liabilities, and transactions of the Joint Sales
              Company and shall see that adequate audits thereof are currently
              and regularly made. The Treasurer shall have such other powers and
              perform such other duties that generally are incident to the
              position of a treasurer of a corporation or as may from time to
              time be assigned to him or her by the Board of Directors.

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                    (iv)    The Secretary. The Secretary shall be appointed as
              directed first by ADM, subject to the approval of the Board of
              Directors, to serve commencing on the Effective Date and
              continuing to and including December 31 of the year of
              appointment. The Secretary shall thereafter be appointed to serve
              for a calendar year on an alternating basis as directed by MBX or
              ADM, commencing with MBX, subject to the approval of the Board of
              Directors. The Secretary may be removed by the Board of Directors,
              only at the direction of the Member making the appointment, and
              may be removed with or without cause. The Secretary shall attend
              meetings of the Board of Directors and meetings of the Members and
              record all votes and minutes of all such proceedings in a book
              kept for such purpose. He or she shall have all such further
              powers and duties as generally are incident to the position of a
              secretary of a corporation or as may from time to time be assigned
              to him or her by the Board of Directors.

                    (v)     Such other Officers as the Board of Directors deems
              necessary or desirable, upon such terms as the Board of Directors
              deems appropriate; provided, however, that such Officers may only
              be removed by the Board of Directors.

              (b)   The Board of Directors or the Officers may appoint such
agents and representatives as they deem necessary or desirable, upon such terms
as they deem appropriate.

              (c)   Except with respect to any matter as to which the Board of
Directors has authorized or directed an Officer, each Officer shall be under a
fiduciary duty to conduct the affairs of the Joint Sales Company in the best
interests of the Joint Sales Company, including the safekeeping and use of all
of the Property and the use thereof for the exclusive benefit of the Joint Sales
Company.

              (d)   Except as otherwise provided in a Commercial Alliance
Agreement, the Joint Sales Company shall not enter into any contract without
having the written approval of both an Officer appointed by ADM Polymer
Corporation and an Officer appointed by MBX. Notwithstanding any other provision
of this Agreement, except as set forth in the Commercial Alliance Agreements, no
action may be taken by the Joint Sales Company (whether by the Officers, or
otherwise) in connection with any of the following matters without the unanimous
approval of the Board of Directors:

                            (i)      Any grant or conveyance of any exclusive
              rights to any third party;

                            (ii)     Any agreement to a voluntary restriction on
              the Joint Sales Company's Business;

                            (iii)    Any contract to sell the Products or
              purchase materials for a term in excess of one (1) year;

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                            (iv)     Any activity that is inconsistent with a
              budget or business plan that has been adopted by the Board of
              Directors; or

                            (v)      Any price incentives or rebates offered in
              connection with the sale of Products.

              (e)   Each Member hereby agrees that the Joint Sales Company shall
be permitted to use any counsel regularly employed by any Member (including
without limitation the inside counsel of a Member) with respect to any issue
arising under any Transaction Document and the transactions contemplated hereby
and thereby; provided, however, that such issue does not involve any actual or
potential conflict of interest (i) between, the Members or their respective
Affiliates, a Member or its Affiliates and the Joint Sales Company, or any
Member and an Affiliate of a Member, or (ii) for the proposed counsel. Such
counsel will certify in writing as to the absence of such conflict for such
proposed counsel if requested to do so by any Member; and provided, further that
this Section 5.7(e) shall not, without the written consent of a Member,
constitute a prospective waiver by such Member of its right to allege the
existence of an actual or potential ethical conflict of interest with respect to
such proposed counsel.

                           SECTION 6: ROLE OF MEMBERS

       6.1    RIGHTS OR POWERS.

              The Members shall not have any right or power directly to take
part in the management or control of the Joint Sales Company or its business and
affairs or to act for or bind the Joint Sales Company in any way.
Notwithstanding the foregoing, the Members have all the rights and powers
specifically set forth in this Agreement and, to the extent not inconsistent
with this Agreement, in the Act. The Members shall exercise such rights and
powers through the Steering Committee subject to the terms and conditions set
forth in the Commercial Alliance Agreements.

       6.2    VOTING RIGHTS.

              No Member has any voting right except with respect to those
matters specifically reserved for a Member vote which are set forth in this
Agreement and as required in the Act.

       6.3    REQUIRED MEMBER CONSENTS.

                    Notwithstanding any other provision of this Agreement,
except as set forth in the Commercial Alliance Agreements, no action may be
taken by the Joint Sales Company (whether by the Board of Directors, the
Officers or otherwise) in connection with any of the following matters without
the unanimous consent of the Members, acting through the Steering Committee:

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              (a)   Any activity that is not consistent with the purposes of the
Joint Sales Company as set forth in Section 1.3 hereof;

              (b)   Any act in contravention of this Agreement or any Commercial
Alliance Agreement to which the Joint Sales Company is a party;

              (c)   Confession of a judgment against the Joint Sales Company in
an amount in excess of $200,000;

              (d)   A material change in the Business;

              (e)   Any sale of assets by the Joint Sales Company, other than
sales of inventory in the ordinary course of business, involving total
consideration in excess of $200,000;

              (f)   Any transaction by the Joint Sales Company involving the
incurrence, creation, assumption, guarantee or suffering by the Joint Sales
Company of any indebtedness in excess of $200,000 in principal amount, or the
issuance of any equity or any equity-based security by the Joint Sales Company;

              (g)   Any expenditure, investment or acquisition involving total
consideration in excess of $200,000, other than the acquisition of raw materials
or products for sale in the ordinary course of business;

              (h)   Any transaction between the Joint Sales Company and any
Member, Director or Affiliate of a Member;

              (i)   Any transaction to liquidate or dissolve the Joint Sales
Company;

              (j)   Any transaction by the Joint Sales Company to merge or
consolidate with another entity;

              (k)   Any transaction to sell or license any intellectual property
owned or licensed by the Joint Sales Company;

              (l)   Adopting or implementing any business plan or budget
intended to represent a detailed statement of expected income, expenses and
other expenditures or receipts on behalf of the Joint Sales Company or any
Wholly-Owned Affiliate;

              (m)   Any amendment and/or restatement of this Agreement or the
Certificate and/or any amendment and/or restatement of the governing documents
of any Wholly-Owned Affiliate of the Joint Sales Company;

              (n)   The formation, dissolution, liquidation, merger or
consolidation of any Wholly-Owned Affiliate of the Joint Sales Company;

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              (o)   Issuing or committing to issue, or repurchasing or redeeming
of or committing to repurchase or redeem any Units or other equity interest that
may hereafter be created (collectively, "Equity Interests"), options to acquire
Equity Interests or any other rights relative to or in any way related to any
Equity Interests of the Joint Sales Company or any Wholly-Owned Affiliate of the
Joint Sales Company;

              (p)   Causing the Joint Sales Company or any Wholly Owned
Affiliate of the Joint Sales Company to distribute any cash or property to any
Member, provided, however, that the distributions required by Sections 4.1 and
6.13 shall be made in accordance with such Sections;

              (q)   Any action requiring the unanimous consent of the Steering
Committee in the Commercial Alliance Agreements.

              The restrictions above shall not apply to actions or transactions
specifically contemplated by an agreement that is entered into on, as of or
prior to the Effective Date, by MBX or ADM Polymer Corporation, or their
respective Affiliates, with the Joint Sales Company, including but not limited
to the Commercial Alliance Agreements, or is entered into by both MBX and ADM
Polymer Corporation or their respective Affiliates at any time.

       6.4    [RESERVED]

       6.5    WITHDRAWAL/RESIGNATION.

              Except as otherwise provided in Sections 4 and 12 hereof, no
Member shall demand or receive a return on or of its Capital Contributions or
withdraw from the Joint Sales Company without the consent of all Members. Except
as otherwise provided in the Act or this Agreement, upon resignation, any
resigning Member is entitled to receive only the distribution to which it is
entitled under this Agreement, and if no specific provision of this Agreement
calls for a distribution or payment upon such resignation, then no payment or
distribution shall be due or owing. Under circumstances requiring a return of
any Capital Contributions, no Member has the right to receive Property other
than cash except as may be specifically provided herein.

       6.6    MEMBER COMPENSATION.

              No Member shall receive any interest, salary or drawing with
respect to its Capital Contributions or its Capital Account or for services
rendered on behalf of the Joint Sales Company, or otherwise, in its capacity as
a Member, except as otherwise provided in this Agreement.

       6.7    MEMBERS LIABILITY.

              No Member shall be liable under a judgment, decree or order of a
court, or in any other manner for the Debts or any other obligations or
liabilities of the Joint Sales

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Company. A Member shall be liable only to make its Capital Contributions and
shall not be required to restore a deficit balance in its Capital Account or to
lend any funds to the Joint Sales Company or, after its Capital Contributions
have been made, to make any additional contributions, assessments or payments to
the Joint Sales Company, provided that a Member may be required to repay
distributions made to it as provided in Section 18-607 of the Act. The Directors
shall not have any personal liability for the repayment of any Capital
Contributions of any Member.

       6.8    PARTITION.

              While the Joint Sales Company remains in existence or is
continued, each Member agrees and waives its rights to have any Property
partitioned, or to file a complaint or to institute any suit, action or
proceeding at law or in equity to have any Property partitioned, and each
Member, on behalf of itself, its successors and its assigns hereby waives any
such right.

       6.9    CONFIDENTIALITY.

              Each Member covenants to comply with the terms and conditions of
all confidentiality agreements between and among ADM Polymer Corporation, MBX
and their respective Affiliates whether presently in existence or entered into
after the Effective Date and a breach of any such confidentiality agreement
shall constitute a breach of this Agreement.

       6.10   TRANSACTIONS BETWEEN A MEMBER AND THE JOINT SALES COMPANY.

              Except as otherwise provided by applicable law, any Member may,
but shall not be obligated to, lend money to the Joint Sales Company, act as
surety for the Joint Sales Company and transact other business with the Joint
Sales Company and has the same rights and obligations when transacting business
with the Joint Sales Company as a person or entity who is not a Member. A
Member, any Affiliate thereof or an employee, stockholder, agent, director or
officer of a Member or any Affiliate thereof, may also be an employee or be
retained as an agent of the Joint Sales Company. The existence of these
relationships and acting in such capacities will not result in the Member being
deemed to be participating in the control of the business of the Joint Sales
Company or otherwise affect the limited liability of the Member.

       6.11   OTHER INSTRUMENTS.

              Each Member hereby agrees to execute and deliver to the Joint
Sales Company within five (5) days after receipt of a written request therefor,
such other and further documents and instruments, statements of interest and
holdings, designations, powers of attorney and other instruments and to take
such other action as the Board of Directors deems necessary, useful or
appropriate to comply with any laws, rules or regulations as may be necessary to
enable the Joint Sales Company to fulfill its responsibilities under this
Agreement.

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       6.12   NUMBER OF MEMBERS.

              Unless the Members shall unanimously agree to the contrary, there
shall at no time be more than two (2) Members of the Joint Sales Company.

       6.13   EQUALIZATION PAYMENTS.

              On each Equalization Distribution Date, the Joint Sales Company
shall pay to each Member, to the extent of all Available Cash, an amount equal
to each such Member's Equalization Payment, if any. Equalization Payments shall
be treated for income tax purposes as "guaranteed payments" within the meaning
of Code Section 707(c) and, whether or not paid, shall not affect any Member's
Capital Account balance.

                    SECTION 7: REPRESENTATIONS AND WARRANTIES

       7.1    IN GENERAL.

              As of the date hereof, each of the Members hereby makes each of
the representations and warranties applicable to such Member as set forth in
Section 7.2 hereof, and such warranties and representations shall survive the
execution of this Agreement.

       7.2    REPRESENTATIONS AND WARRANTIES.

                    Each Member hereby represents and warrants that:

              (a)   Due Incorporation or Formation; Authorization of Agreement.
Such Member is a corporation duly organized or a partnership or limited
liability company duly formed, validly existing, and in good standing under the
laws of the jurisdiction of its incorporation or formation and has the
corporate, partnership, or company power and authority to own its property and
carry on its business as owned and carried on at the date hereof and as
contemplated hereby. Such Member is duly licensed or qualified to do business
and in good standing in each of the jurisdictions in which the failure to be so
licensed or qualified would have a material adverse effect on its financial
condition or its ability to perform its obligations hereunder. Such Member has
the corporate, partnership or company power and authority to execute and deliver
this Agreement and to perform its obligations hereunder and the execution,
delivery, and performance of this Agreement has been duly authorized by all
necessary corporate, partnership, or company action. This Agreement constitutes
the legal, valid, and binding obligation of such Member.

              (b)   No Conflict with Restrictions; No Default. Neither the
execution, delivery, and performance of this Agreement nor the consummation by
such Member of the transactions contemplated hereby (i) will conflict with,
violate, or result in a breach of any of the terms, conditions, or provisions of
any law, regulation, order, writ, injunction, decree, determination, or award of
any court, any governmental department, board, agency, or instrumentality,
domestic or foreign, or any arbitrator, applicable to such Member, its Parent,
or any of its Affiliates, (ii) will conflict with, violate, result in a breach
of, or constitute a

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default under any of the terms, conditions, or provisions of the articles of
incorporation, bylaws, partnership agreement or operating agreement of such
Member, its Parent, or any of its Affiliates or of any material agreement or
instrument to which such Member, its Parent, or any of its Affiliates is a party
or by which such Member, its Parent, or any of its Affiliates is or may be bound
or to which any of its material properties or assets is subject, (iii) will
conflict with, violate, result in a breach of, constitute a default under
(whether with notice or lapse of time or both), accelerate or permit the
acceleration of the performance required by, give to others any material
interests or rights, or require any consent, authorization, or approval under
any indenture, mortgage, lease agreement, or instrument to which such Member,
its Parent, or any of its Affiliates is a party or by which such Member, its
Parent, or any of its Affiliates is or may be bound, or (iv) will result in the
creation or imposition of any lien upon any of the material properties or assets
of such Member, its Parent, or any of its Affiliates.

              (c)   Governmental Authorizations. Any registration, declaration,
or filing with, or consent, approval, license, permit, or other authorization or
order by, any governmental or regulatory authority, domestic or foreign, that is
required in connection with the valid execution, delivery, acceptance and
performance by such Member under this Agreement or the consummation by such
Member of any transaction contemplated hereby has been completed, made, or
obtained on or before the Effective Date.

              (d)   Litigation. There are no actions, suits, proceedings, or
investigations pending or, to the knowledge of such Member or any of its
Affiliates, threatened against or affecting such Member or any of its Affiliates
or any of their properties, assets, or businesses in any court or before or by
any governmental department, board, agency, or instrumentality, domestic or
foreign, or any arbitrator which could, if adversely determined (or, in the case
of an investigation could lead to any action, suit, or proceeding, which if
adversely determined could) reasonably be expected to materially impair such
Member's ability to perform its obligations under this Agreement or to have a
material adverse effect on the consolidated financial condition of such Member;
and such Member or any of its Affiliates has not received any currently
effective notice of any default, and such Member or any of its Affiliates is not
in default, under any applicable order, writ, injunction, decree, permit,
determination, or award of any court, any governmental department, board,
agency, or instrumentality, domestic or foreign, or any arbitrator which could
reasonably be expected to materially impair such Member's ability to perform its
obligations under this Agreement or to have a material adverse effect on the
consolidated financial condition of such Member.

              (e)   Investment Company Act; Public Utility Holding Company Act.
Neither such Member nor any of its Affiliates is, nor will the Joint Sales
Company as a result of such Member holding an interest therein be, an
"investment company" as defined in, or subject to regulation under, the
Investment Company Act of 1940. Neither such Member nor any of its Affiliates
is, nor will the Joint Sales Company as a result of such Member holding an
Interest therein be, a "holding company," "an affiliate of a holding company,"
or a "subsidiary of a holding company" as defined in, or subject to regulation
under, the Public Utility Holding Company Act of 1935.

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              (f)   Investigation. Such Member is acquiring its Units based upon
its own investigation, and the exercise by such Member of its rights and the
performance of its obligations under this Agreement will be based upon its own
investigation, analysis, and expertise. Such Member's acquisition of its Units
is being made for its own account for investment, and not with a view to the
sale or distribution thereof. Such Member is a sophisticated investor possessing
an expertise in analyzing the benefits and risks associated with acquiring
investments that are similar to the acquisition of its Units.

                    SECTION 8: ACCOUNTING, BOOKS AND RECORDS

       8.1    ACCOUNTING, BOOKS AND RECORDS.

              (a)   The Joint Sales Company shall keep on site at its principal
place of business each of the following:

                         (i)      Separate books of account for the Joint Sales
              Company which shall show a true and accurate record of all costs
              and expenses incurred, all charges made, all credits made and
              received, and all income derived in connection with the conduct of
              the Joint Sales Company and the operation of the Business in
              accordance with this Agreement;

                         (ii)     current list of the full name and last known
              business, residence, or mailing address of each Member, Director,
              and Officer, both past and present;

                         (iii)    copy of the Certificate and all amendments
              thereto, together with executed copies of any powers of attorney
              pursuant to which any amendment has been executed;

                         (iv)     Copies of the Joint Sales Company's federal,
              state, and local income tax returns and reports, if any, for the
              three (3) most recent years;

                         (v)      Copies of this Agreement;

                         (vi)     Any written consents obtained from Members
              pursuant to Section 6.3(e) hereof regarding action taken by
              Members without a meeting; and

                         (vii)    Any written consents obtained from the
              Directors pursuant to Section 5.2(d) hereof regarding action taken
              by the Directors without a meeting, and minutes of meetings of the
              Board of Directors.

              (b)   The Joint Sales Company shall use the accrual method of
accounting in preparation of its financial reports and for tax purposes and
shall keep its books and records accordingly. Any Member or its designated
representative has the right to have reasonable access to and inspect and copy
the contents of such books or records and shall also have

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reasonable access during normal business hours to such additional financial
information, documents, books and records. The rights granted to a Member
pursuant to this Section 8.1 are expressly subject to compliance by such Member
with the safety, security and confidentiality procedures and guidelines of the
Joint Sales Company, as such procedures and guidelines may be established from
time to time.

       8.2    REPORTS.

              (a)   IN GENERAL. The Treasurer shall be responsible for causing
the preparation of financial reports of the Joint Sales Company and the
coordination of financial matters of the Joint Sales Company with the Joint
Sales Company's accountants.

              (b)   PERIODIC AND OTHER REPORTS. The Joint Sales Company shall
cause to be delivered to each Member the financial statements listed in clauses
(i) and (ii) below, prepared, in each case (other than with respect to Member's
Capital Accounts, which shall be prepared in accordance with this Agreement) in
accordance with GAAP consistently applied (and, if required by any Member or its
Affiliates for purposes of reporting under the Securities Exchange Act of 1934,
Regulation S-X), and such other reports as any Member may reasonably request
from time to time; PROVIDED that, if the Board of Directors so determines within
thirty (30) days thereof, such other reports shall be provided at such
requesting Member's sole cost and expense. The monthly and quarterly financial
statements referred to in clause (ii) below may be subject to normal year-end
audit adjustments.

                         (i)      As soon as practicable following the end of
              each Fiscal Year (and in any event not later than ninety (90) days
              after the end of such Fiscal Year) and at such time as
              distributions are made to the Members pursuant to Section 12
              hereof following the occurrence of a Dissolution Event, a balance
              sheet of the Joint Sales Company as of the end of such Fiscal Year
              and the related statements of operations, Members' Capital
              Accounts and changes therein, and cash flows for such Fiscal Year,
              together with appropriate notes to such financial statements and
              supporting schedules, all of which shall be audited and certified
              by the Joint Sales Company's accountants, and in each case, to the
              extent the Joint Sales Company was in existence, setting forth in
              comparative form the corresponding figures for the immediately
              preceding Fiscal Year end (in the case of the balance sheet) and
              the two (2) immediately preceding Fiscal Years (in the case of the
              statements).

                         (ii)     As soon as practicable following the end of
              each of the first three Fiscal Quarters of each Fiscal Year (and
              in any event not later than forty five (45) days after the end of
              each such Fiscal Quarter), a balance sheet of the Joint Sales
              Company as of the end of such Fiscal Quarter and the related
              statements of operations and cash flows for such Fiscal Quarter
              and for the Fiscal Year to date, in each case, to the extent the
              Joint Sales Company was in existence, setting forth in comparative
              form the corresponding figures for the prior Fiscal Year's Fiscal
              Quarter and the interim period corresponding to the Fiscal Quarter
              and the interim period just completed.

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              The quarterly or monthly statements described in clause (ii) above
shall be accompanied by a written certification of the Treasurer of the Joint
Sales Company that such statements have been prepared in accordance with GAAP
consistently applied or this Agreement, as the case may be.

       8.3    TAX MATTERS.

              (a)   TAX ELECTIONS. It is the intention of the parties hereto
that the relationships created by this Agreement will, for federal, state, and
local income tax purposes, be treated as a partnership and no Member nor the Tax
Matters Member shall take any action inconsistent with the Joint Sales Company's
status as a partnership for federal, state, or local income tax purposes without
the consent of all Members. The Board of Directors by a unanimous vote shall,
without any further consent of the Members being required (except as
specifically required herein), make any and all elections for federal, state,
local, and foreign tax purposes including, without limitation, any election, if
permitted by applicable law: (i) to adjust the basis of Property pursuant to
Code Sections 754, 734(b) and 743(b), or comparable provisions of state, local
or foreign law, in connection with Transfers of Units and Joint Sales Company
distributions; (ii) with the consent of all of the Members, to extend the
statute of limitations for assessment of tax deficiencies against the Members
with respect to adjustments to the Joint Sales Company's federal, state, local
or foreign tax returns; and (iii) to the extent provided in Code Sections 6221
through 6231 and similar provisions of federal, state, local, or foreign law, to
represent the Joint Sales Company and the Members before taxing authorities or
courts of competent jurisdiction in tax matters affecting the Joint Sales
Company or the Members in their capacities as Members, and to file any tax
returns and execute any agreements or other documents relating to or affecting
such tax matters, including agreements or other documents that bind the Members
with respect to such tax matters or otherwise affect the rights of the Joint
Sales Company and the Members. ADM Polymer Corporation is specifically
authorized to act as the "TAX MATTERS MEMBER" under Section 6231 of the Code and
in any similar capacity under state or local law.

              (b)   TAX INFORMATION. Necessary tax information shall be
delivered to each Member as soon as practicable after the end of each Fiscal
Year of the Joint Sales Company but not later than five (5) months after the end
of each Fiscal Year.

              (c)   REIMBURSEMENTS. Notwithstanding anything to the contrary in
this Agreement, the Tax Matters Member shall be reimbursed for all reasonable
expenses incurred by it in connection with its service as Tax Matters Member.
Such reimbursements shall not affect the Capital Account of the Tax Matters
Member.

                              SECTION 9: AMENDMENTS

       9.1    AMENDMENTS.

              (a)   Amendments to this Agreement may be proposed by any Director
or any Member. Following such proposal, the Board of Directors shall submit to
the Members a

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verbatim statement of any proposed amendment, providing that counsel for the
Joint Sales Company shall have approved of the same in writing as to form, and
the Board of Directors shall include in any such submission a recommendation as
to the proposed amendment. The Board of Directors shall seek the written vote of
the Members on the proposed amendment or shall call a meeting to vote thereon
and to transact any other business that it may deem appropriate. A proposed
amendment shall be adopted and be effective as an amendment hereto if it
receives the unanimous approval of the Members in accordance with Section 6.4
hereof.

              (b)   Notwithstanding Section 9.1(a) hereof, this Agreement shall
not be amended without the consent of each Member adversely affected if such
amendment would (i) modify the limited liability of a Member, or (ii) alter the
interest of such Member in Profits, Losses, other items, or any Joint Sales
Company distributions.

                              SECTION 10: TRANSFERS

       10.1   RESTRICTIONS ON TRANSFERS.

              Except as otherwise permitted by this Agreement, no Member shall
(i) Transfer directly or indirectly all or any portion of its Units, or (ii)
pledge or otherwise encumber all or any part of its Units as security for the
payment of a Debt.

       10.2   PERMITTED TRANSFERS.

              Subject to the conditions and restrictions set forth in Sections
10.3 and 10.6 hereof, a Member may at any time Transfer all (but not less than
all) of its Units to (a) the other Member or an Affiliate of the other Member,
or (b) the transferor's trustee to whom such Units are transferred involuntarily
by operation of law, (any such Transfer being referred to in this Agreement as a
"Permitted Transfer").

       10.3   CONDITIONS TO PERMITTED TRANSFERS.

                    A Transfer shall not be treated as a Permitted Transfer
under Section 10.2 hereof unless and until the following conditions are
satisfied:

              (a)   Except in the case of a Transfer involuntarily by operation
of law, the transferor and transferee shall execute and deliver to the Joint
Sales Company such documents and instruments of conveyance as may be necessary
or appropriate in the opinion of counsel to the Joint Sales Company to effect
such Transfer. In the case of a Transfer of Units involuntarily by operation of
law, the Transfer shall be confirmed by presentation to the Joint Sales Company
of legal evidence of such Transfer, in form and substance satisfactory to
counsel to the Joint Sales Company. In all cases, the Joint Sales Company shall
be reimbursed by the transferor and/or transferee for all costs and expenses
that it reasonably incurs in connection with such Transfer.

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              (b)   The transferor and transferee shall furnish the Joint Sales
Company with the transferee's taxpayer identification number, sufficient
information to determine the transferee's initial tax basis in the Units
transferred, and any other information reasonably necessary to permit the Joint
Sales Company to file all required federal and state tax returns and other
legally required information statements or returns. Without limiting the
generality of the foregoing, the Joint Sales Company shall not be required to
make any distribution otherwise provided for in this Agreement with respect to
any transferred Units until it has received such information.

              (c)   Except in the case of a Transfer of Units involuntarily by
operation of law, either (a) such Units shall be registered under the Securities
Act, and any applicable state securities laws, or (b) the transferor shall
provide to the Joint Sales Company and the other Member an opinion of counsel,
which opinion and counsel shall be reasonably satisfactory to the Board of
Directors, to the effect that such Transfer is exempt from all applicable
registration requirements and that such Transfer will not violate any applicable
laws regulating the Transfer of securities.

              (d)   Except in the case of a Transfer of Units involuntarily by
operation of law, the transferor shall provide to the Joint Sales Company and
the other Member an opinion of counsel, which opinion and counsel shall be
reasonably satisfactory to the Board of Directors, to the effect that such
Transfer will not cause the Joint Sales Company to be deemed to be an
"investment company" under the Investment Company Act of 1940.

       10.4   [RESERVED]

       10.5   PROHIBITED TRANSFERS.

              Any purported Transfer of Units that is not a Permitted Transfer
shall be null and void and of no force or effect whatever; provided that, if the
Joint Sales Company is required to recognize a Transfer that is not a Permitted
Transfer (or if the Members, in their sole discretion, unanimously agree to
recognize a Transfer that is not a Permitted Transfer), the Units Transferred
shall be strictly limited to the transferor's rights to allocations and
distributions as provided by this Agreement with respect to the transferred
Units, which allocations and distributions may be applied (without limiting any
other legal or equitable rights of the Joint Sales Company) to satisfy any
debts, obligations, or liabilities for damages that the transferor or transferee
of such Interest may have to the Joint Sales Company.

              In the case of a Transfer or attempted Transfer of Units that is
not a Permitted Transfer, the parties engaging or attempting to engage in such
Transfer shall be liable to indemnify and hold harmless the Joint Sales Company
and the other Members from all cost, liability, and damage that any of such
indemnified Members may incur (including, without limitation, incremental tax
liabilities, lawyers' fees and expenses) as a result of such Transfer or
attempted Transfer and efforts to enforce the indemnity granted hereby.

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       10.6   TAX TERMINATION RESTRICTIONS.

              (a)   Notwithstanding any other provision of this Section 10,
except in the case of a Transfer of Units involuntarily by operation of law and
except as otherwise provided in this Section 10.6, no Transfer of Units shall be
permitted if, in the opinion of the Joint Sales Company's tax counsel, (i) such
Transfer would more likely than not terminate the Joint Sales Company for
federal income tax purposes under Section 708(b)(1)(B) of the Code (a "Technical
Termination") and (ii) any Technical Termination caused by such Transfer would
be disadvantageous to the Joint Sales Company.

              (b)   Prior to the effective date of any Transfer, the Joint Sales
Company may obtain and deliver to the transferor a written opinion from the
Joint Sales Company's tax counsel stating that the proposed Transfer would cause
a Technical Termination and explaining how such Technical Termination would be
disadvantageous to the Joint Sales Company (a "Termination Opinion"). If the
Joint Sales Company fails to provide a Termination Opinion prior to the
effective date, the Transfer of such Offered Units will not be prohibited by
this Section 10.6, but shall remain subject to any and all requirements of the
remaining provisions of this Section 10.

              (c)   If the Joint Sales Company provides a Termination Opinion to
the transferor prior to such effective date, the Board of Directors by a
unanimous decision shall have the right to restructure the proposed Transfer so
that a Technical Termination will not result therefrom. To restructure the
Transfer, the Board of Directors shall prior to the effective date of the
transfer, provide a written explanation to the transferor explaining any and all
necessary changes required by the Board of Directors so that a Technical
Termination will be avoided if the proposed Transfer is ultimately consummated.
For the avoidance of doubt, the Board of Directors shall only be entitled to
make changes necessary to avoid a Technical Termination, and shall not have the
right to restructure any proposed Transfer in any other way or for any other
purpose.

       10.7   RIGHTS OF UNADMITTED ASSIGNEES.

              A Person who acquires Units but who is not admitted as a
substituted Member pursuant to Section 10.8 hereof shall be entitled only to
allocations and distributions with respect to such Units in accordance with this
Agreement, and shall have no right to any information or accounting of the
affairs of the Joint Sales Company, shall not be entitled to inspect the books
or records of the Joint Sales Company, shall not be entitled to designate any
Directors and shall not have any of the other rights of a Member under the Act
or this Agreement.

       10.8   ADMISSION OF SUBSTITUTED MEMBERS.

              Subject to the other provisions of this Section 10, a transferee
of Units may be admitted to the Joint Sales Company as a substituted Member only
upon satisfaction of the conditions set forth in this Section 10.8:

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              (a)   The Units with respect to which the transferee is being
admitted were acquired by means of a Permitted Transfer;

              (b)   The transferee of Units (other than, with respect to clauses
(i) and (ii) below, a transferee that was a Member prior to the Transfer) shall,
by written instrument in form and substance reasonably satisfactory to the Board
of Directors (and, in the case of clause (iii) below, the transferor Member),
(i) make representations and warranties to the nontransferring Member equivalent
to those set forth in Section 7, (ii) accept and adopt the terms and provisions
of this Agreement, including this Section 10, and (iii) assume the obligations
of the transferor Member under this Agreement with respect to the transferred
Units. The transferor Member shall be released from all such assumed obligations
except (x) those obligations or liabilities of the transferor Member arising out
of a breach of this Agreement, (y) in the case of a Transfer to any Person other
than a Member or any of its Affiliates, those obligations or liabilities of the
transferor Member based on events occurring, arising or maturing prior to the
date of Transfer, and (z) in the case of a Transfer to any of its Affiliates,
any Capital Contribution of the transferor Member under this Agreement;

              (c)   The transferee pays or reimburses the Joint Sales Company
for all reasonable legal, filing, accounting and publication costs that the
Joint Sales Company incurs in connection with the admission of the transferee as
a Member with respect to the Transferred Units; and

              (d)   Except in the case of a Transfer involuntarily by operation
of law, if required by the Board of Directors, the transferee (other than a
transferee that was a Member prior to the Transfer) shall deliver to the Joint
Sales Company evidence of the authority of such Person to become a Member and to
be bound by all of the terms and conditions of this Agreement, and the
transferee and transferor shall each execute and deliver such other instruments
as the Board of Directors reasonably deems necessary or appropriate to effect,
and as a condition to, such Transfer, including amendments to the Certificate or
any other instrument filed with the State of Delaware or any other state or
governmental authority.

       10.9   REPRESENTATIONS REGARDING TRANSFERS; LEGEND.

              (a)   Each Member hereby covenants and agrees with the Joint Sales
Company for the benefit of the Joint Sales Company and all Members, that (i) it
is not currently making a market in Units and will not in the future make a
market in Units, (ii) it will not Transfer its Units on an established
securities market, a secondary market (or the substantial equivalent thereof)
within the meaning of Code Section 7704(b) (and any Regulations, proposed
Regulations, revenue rulings, or other official pronouncements of the Internal
Revenue Service or Treasury Department that may be promulgated or published
thereunder), and (iii) in the event such Regulations, revenue rulings, or other
pronouncements treat any or all arrangements which facilitate the selling of
Joint Sales Company interests and which are commonly referred to as "matching
services" as being a secondary market or substantial equivalent thereof, it will
not Transfer any Units through a matching service that is not approved in
advance by the Joint Sales Company. Each Member further agrees that it will

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not Transfer any Units to any Person unless such Person agrees to be bound by
this Section 10.9(a) and to Transfer such Units only to Persons who agree to be
similarly bound.

              (b)   Each Member hereby represents and warrants to the Joint
Sales Company and the Members that such Member's acquisition of Units hereunder
is made as principal for such Member's own account and not for resale or
distribution of such Units. Each Member further hereby agrees that the following
legend may be placed upon any counterpart of this Agreement, the Certificate, or
any other document or instrument evidencing ownership of Units:

                         The Company Units represented by this document have not
                  been registered under any securities laws and the
                  transferability of such Units is restricted. Such Units may
                  not be sold, assigned, or transferred, nor will any assignee,
                  vendee, transferee, or endorsee thereof be recognized as
                  having acquired any such Units by the issuer for any purposes,
                  unless (1) a registration statement under the Securities Act
                  of 1933, as amended, with respect to such Units shall then be
                  in effect and such transfer has been qualified under all
                  applicable state securities laws, or (2) the availability of
                  an exemption from such registration and qualification shall be
                  established to the satisfaction of counsel to the Joint Sales
                  Company.

                         The Units represented by this document are subject to
                  further restriction as to their sale, transfer, hypothecation,
                  or assignment as set forth in the Operating Agreement of the
                  issuer and agreed to by each Member. Said restriction
                  provides, among other things, that no Units may be transferred
                  without first offering such Units to the other Member.

       10.10  DISTRIBUTIONS AND ALLOCATIONS IN RESPECT OF TRANSFERRED UNITS.

              If any Units are Transferred during any Allocation Year in
compliance with the provisions of this Section 10, Profits, Losses, each item
thereof, and all other items attributable to the Transferred Units for such
Allocation Year shall be divided and allocated between the transferor and the
transferee by taking into account their varying Percentage Interests during the
Fiscal Year in accordance with Code Section 706(d), using any conventions
permitted by law and selected by the Board of Directors. All distributions on or
before the date of such Transfer shall be made to the transferor, and all
distributions thereafter shall be made to the transferee. Solely for purposes of
making such allocations and distributions, the Joint Sales Company shall
recognize such Transfer not later than the end of the calendar month during
which it is given notice of such Transfer, provided that, if the Joint Sales
Company is given notice of a Transfer at least ten (10) Business Days prior to
the Transfer, the Joint Sales Company shall recognize such Transfer as of the
date of such Transfer, and provided further that if the Joint Sales Company does
not receive a notice stating the date such Units were

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transferred and such other information as the Board of Directors may reasonably
require within thirty (30) days after the end of the Allocation Year during
which the Transfer occurs, then all such items shall be allocated, and all
distributions shall be made to the Person who, according to the books and
records of the Joint Sales Company, was the owner of the Units on the last day
of such Allocation Year. Neither the Joint Sales Company nor any Director shall
incur any liability for making allocations and distributions in accordance with
the provisions of this Section 10.10, whether or not any Director or the Joint
Sales Company has knowledge of any Transfer of ownership of any Units.

                             SECTION 11: ADVERSE ACT

       11.1   REMEDIES.

              (a)   If an Adverse Act has occurred or is continuing with respect
to any Member, the non-Adverse Member may elect to cause the dissolution,
winding up and liquidation of the Joint Sales Company pursuant to Section 12.

              The foregoing remedy shall not be deemed to be exclusive, and,
subject to the requirements of this Section 11.1(a) regarding the timing of the
election of such remedies, selection or resort to any thereof shall not preclude
selection or resort to the others.

              The election of a remedy specified above may be exercised by
notice given to the Adverse Member (A) in case of an Adverse Act specified in
clause (i) of the definition of the term "Adverse Act" in Section 1.10, within
ninety (90) days after the occurrence of such Adverse Act or (B) in the case of
any other Adverse Act with respect to which such remedy is available, within
ninety (90) days after the Member making such election obtains actual knowledge
of the occurrence of such Adverse Act, including, if applicable, that any cure
period has expired.

              Except as provided in Section 11.1(b), the failure to elect the
remedy with respect to the subject Adverse Act within the time periods provided
in the preceding paragraph shall be conclusively presumed to be a waiver of the
remedies provided in this Section 11 with respect to the subject Adverse Act.

              The resort to any remedy pursuant to this Section 11.1(a) shall
not for any purpose be deemed to be a waiver of any remedy not described in this
Section 11.1(a) and otherwise available hereunder or under applicable law.

              (b)   If the Joint Sales Company is dissolved pursuant to Section
12.1(a) at any time as a result of a Dissolution Event that occurs prior to a
remedy having been elected pursuant to Section 11.1(a) with respect to any
Adverse Member, the time periods for such election shall thereupon expire and
the Board of Directors shall deduct from any amounts to be paid to such Adverse
Member pursuant to Section 12.2 that amount which it unanimously estimates to be
reasonably sufficient to compensate the Joint Sales Company and the non-

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Adverse Member for Damages incurred as a result of the Adverse Act (subject to
the limitations of Section 11.1(a)) and shall pay the same to the non-Adverse
Member on behalf of the Adverse Member.

                     SECTION 12: DISSOLUTION AND WINDING UP

       12.1   DISSOLUTION EVENTS.

              (a)   DISSOLUTION. The Joint Sales Company shall dissolve and
shall commence winding up and liquidating upon the first to occur of any of the
following (each a "DISSOLUTION EVENT"):

                         (i)      The unanimous vote of the Members to dissolve,
              wind up, and liquidate the Joint Sales Company;

                         (ii)     A judicial determination that an event has
              occurred that makes it unlawful, impossible or impractical to
              carry on the Business;

                         (iii)    The election of the non-Adverse Member
              pursuant to Section 11.1(a);

                         (iv)     The termination or expiration of the
              Commercial Alliance Agreement;

                         (v)      The election of a Member to dissolve the Joint
              Sales Company pursuant to Section 9.8.3 of the Commercial Alliance
              Agreement.

              The Members hereby agree that, notwithstanding any provision of
the Act, the Joint Sales Company shall not dissolve prior to the occurrence of a
Dissolution Event.

              (b)   RECONSTITUTION. If it is determined, by a court of competent
jurisdiction, that the Joint Sales Company has dissolved prior to the occurrence
of a Dissolution Event, then within an additional ninety (90) days after such
determination (the "RECONSTITUTION PERIOD"), either Member may elect to
reconstitute the Joint Sales Company and continue its business on the same terms
and conditions set forth in this Agreement by forming a new limited liability
company on terms identical to those set forth in this Agreement. Unless such an
election is made within the Reconstitution Period, the Joint Sales Company shall
liquidate and wind up its affairs in accordance with Section 12.2 hereof. If
such an election is made within the Reconstitution Period, then:

                         (i)      The reconstituted limited liability company
              shall continue until the occurrence of a Dissolution Event as
              provided in this Section 12.1(a);

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                         (ii)     Unless otherwise agreed to by a majority in
              Percentage Interests of the Members, the Certificate and this
              Agreement shall automatically constitute the Certificate and
              Agreement of such new Joint Sales Company. All of the assets and
              liabilities of the dissolved Joint Sales Company shall be deemed
              to have been automatically assigned, assumed, conveyed and
              transferred to the new Joint Sales Company. No bond, collateral,
              assumption or release of any Member's or the Joint Sales Company's
              liabilities shall be required;

PROVIDED that the right of the Members to select successor Directors and to
reconstitute and continue the Business shall not exist and may not be exercised
unless the Joint Sales Company has received an opinion of counsel that the
exercise of the right would not result in the loss of limited liability of any
Member and neither the Joint Sales Company nor the reconstituted limited
liability company would cease to be treated as a partnership for federal income
tax purposes upon the exercise of such right to continue.

       12.2   WINDING UP.

              Upon the occurrence of (i) a Dissolution Event or (ii) the
determination by a court of competent jurisdiction that the Joint Sales Company
has dissolved prior to the occurrence of a Dissolution Event (unless the Joint
Sales Company is reconstituted pursuant to Section 12.1(b) hereof), the Joint
Sales Company shall continue solely for the purposes of winding up its affairs
in an orderly manner, liquidating its assets, and satisfying the claims of its
creditors and Members, and no Member shall take any action that is inconsistent
with, or not necessary to or appropriate for, the winding up of the Joint Sales
Company's business and affairs, PROVIDED that all covenants contained in this
Agreement and obligations provided for in this Agreement shall continue to be
fully binding upon the Members until such time as the Property has been
distributed pursuant to this Section 12.2 and the Certificate has been canceled
pursuant to the Act. The Liquidator shall be responsible for overseeing the
winding up and dissolution of the Joint Sales Company, which winding up and
dissolution shall be completed within ninety (90) days of the occurrence of the
Dissolution Event and within ninety (90) days after the last day on which the
Joint Sales Company may be reconstituted pursuant to Section 12.1(b) hereof, as
applicable. The Liquidator shall take full account of the Joint Sales Company's
liabilities and Property and shall cause the Property or the proceeds from the
sale thereof (as determined pursuant to Section 12.10 hereof), to the extent
sufficient therefor, to be applied and distributed, to the maximum extent
permitted by law, in the following order:

              (a)   First, to creditors (including Members and Directors who are
creditors, to the extent otherwise permitted by law) in satisfaction of all of
the Joint Sales Company's Debts and other liabilities (whether by payment or the
making of reasonable provision for payment thereof), other than liabilities for
which reasonable provision for payment has been made and liabilities for
distribution to members under Section 18-601 or 18-604 of the Act;

              (b)   Second, to ADM Polymer Corporation until the Ledger Account
is repaid;

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              (c)   Third, to the Members in amounts equal to any Equalization
Payments then due and owing to the Members;

              (d)   Fourth, to the Members in accordance with the positive
balance in their Capital Accounts, after giving effect to all contributions,
distributions and allocations for all periods;

              (e)   The balance, if any, to the Members in accordance with their
respective Percentage Interests.

              No Member or Director shall receive additional compensation for
any services performed pursuant to this Section 12.

       12.3   COMPLIANCE WITH CERTAIN REQUIREMENTS OF REGULATIONS; DEFICIT
              CAPITAL ACCOUNTS.

              In the event the Joint Sales Company is "liquidated" within the
meaning of Regulations Section 1.704-1(b) (2) (ii) (g), distributions shall be
made pursuant to this Section 12 to the Members who have positive Capital
Accounts in compliance with Regulations Section 1.704-1(b) (2) (ii) (b) (2). If
any Member has a deficit balance in his Capital Account (after giving effect to
all contributions, distributions and allocations for all Allocation Years,
including the Allocation Year during which such liquidation occurs), such Member
shall have no obligation to make any contribution to the capital of the Joint
Sales Company with respect to such deficit, and such deficit shall not be
considered a debt owed to the Joint Sales Company or to any other Person for any
purpose whatsoever. In the discretion of the Liquidator, a pro rata portion of
the distributions that would otherwise be made to the Members pursuant to this
Section 12 may be:

              (a)   Distributed to a trust established for the benefit of the
Members for the purposes of liquidating Joint Sales Company assets, collecting
amounts owed to the Joint Sales Company, and paying any contingent or unforeseen
liabilities or obligations of the Joint Sales Company. The assets of any such
trust shall be distributed to the Members from time to time, in the reasonable
discretion of the Liquidator, in the same proportions as the amount distributed
to such trust by the Joint Sales Company would otherwise have been distributed
to the Members pursuant to Section 12.2 hereof; or

              (b)   Withheld to provide a reasonable reserve for Joint Sales
Company liabilities (contingent or otherwise) and to reflect the unrealized
portion of any installment obligations owed to the Joint Sales Company, provided
that such withheld amounts shall be distributed to the Members as soon as
practicable.

       12.4   DEEMED DISTRIBUTION AND RECONTRIBUTION.

              Notwithstanding any other provision of this Section 12, in the
event the Joint Sales Company is liquidated within the meaning of Regulations
Section 1.704-1(b)(2)(ii)(g) but no Dissolution Event has occurred, the Property
shall not be liquidated, the Joint Sales

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Company's Debts and other Liabilities shall not be paid or discharged, and the
Joint Sales Company's affairs shall not be wound up. Instead, solely for federal
income tax purposes, the Joint Sales Company shall be deemed to have contributed
all its Property and liabilities to a new limited liability company in exchange
for an interest in such new company and, and immediately thereafter, the Joint
Sales Company will be deemed to liquidate by distributing interests in the new
company to the Members.

       12.5   RIGHTS OF MEMBERS.

              Except as otherwise provided in this Agreement, each Member shall
look solely to the Joint Sales Company's Property for the return of its Capital
Contribution and has no right or power to demand or receive Property other than
cash from the Joint Sales Company. If the assets of the Joint Sales Company
remaining after payment or discharge of the debts or liabilities of the Joint
Sales Company are insufficient to return such Capital Contribution, the Members
shall have no recourse against the Joint Sales Company or any other Member or
Director.

       12.6   NOTICE OF DISSOLUTION/TERMINATION.

              (a)   In the event a Dissolution Event occurs or an event occurs
that would, but for provisions of Section 12.1, result in a dissolution of the
Joint Sales Company, the Board of Directors shall, within thirty (30) days
thereafter, provide written notice thereof to each of the Members and to all
other parties with whom the Joint Sales Company regularly conducts business (as
determined in the discretion of the Board of Directors) and shall publish notice
thereof in a newspaper of general circulation in each place in which the Joint
Sales Company regularly conducts business (as determined in the discretion of
the Board of Directors).

              (b)   Upon completion of the distribution of the Joint Sales
Company's Property as provided in this Section 12, the Joint Sales Company shall
be terminated, and the Liquidator shall cause the filing of the Certificate of
Cancellation pursuant to Section 18-203 of the Act and shall take all such other
actions as may be necessary to terminate the Joint Sales Company.

       12.7   ALLOCATIONS DURING PERIOD OF LIQUIDATION.

              During the period commencing on the first day of the Fiscal Year
during which a Dissolution Event occurs and ending on the date on which all of
the assets of the Joint Sales Company have been distributed to the Members
pursuant to Section 12.2 hereof (the "LIQUIDATION PERIOD"), the Members shall
continue to share Profits, Losses, gain, loss and other items of Joint Sales
Company income, gain, loss or deduction in the manner provided in Section 3
hereof, but no distributions shall be made pursuant to Section 4 hereof.

       12.8   CHARACTER OF LIQUIDATING DISTRIBUTIONS.

              All payments made in liquidation of the interest of a Member in
the Joint Sales Company shall be made in exchange for the interest of such
Member in Property pursuant to

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Section 736(b)(1) of the Code, including the interest of such Member in Joint
Sales Company goodwill.

       12.9   THE LIQUIDATOR.

              (a)   DEFINITION. The "LIQUIDATOR" shall mean a Person appointed
by the unanimous decision of the Board of Directors to oversee the liquidation
of the Joint Sales Company.

              (b)   FEES. The Joint Sales Company is authorized to pay a
reasonable fee to the Liquidator for its services performed pursuant to this
Section 12 and to reimburse the Liquidator for its reasonable costs and expenses
incurred in performing those services.

              (c)   INDEMNIFICATION. The Joint Sales Company shall indemnify,
save harmless, and pay all judgments and claims against such Liquidator or any
officers, directors, agents or employees of the Liquidator relating to any
liability or damage incurred by reason of any act performed or omitted to be
performed by the Liquidator, or any officers, directors, agents or employees of
the Liquidator in connection with the liquidation of the Joint Sales Company,
including reasonable attorneys' fees incurred by the Liquidator, officer,
director, agent or employee in connection with the defense of any action based
on any such act or omission, which attorneys' fees may be paid as incurred,
except to the extent such liability or damage is caused by the fraud,
intentional misconduct of, or a knowing violation of the laws by the Liquidator
which was material to the cause of action.

       12.10  FORM OF LIQUIDATING DISTRIBUTIONS.

              For purposes of making distributions required by Section 12.2
hereof, the Liquidator shall abide by any resolutions, plan or decision approved
by the unanimous vote of the Board of Directors as to whether to distribute all
or any portion of the Property in-kind or to sell all or any portion of the
Property and distribute the proceeds therefrom. In the absence of any such
resolutions, plan or decision, the Liquidator may determine in its reasonable
discretion whether to distribute all or any portion of the Property in-kind or
to sell all or any portion of the Property and distribute the proceeds
therefrom.

                            SECTION 13: MISCELLANEOUS

       13.1   NOTICES.

              Any notice, payment, demand, or communication required or
permitted to be given by any provision of this Agreement shall be in writing and
shall be deemed to have been delivered, given, and received for all purposes (i)
if delivered personally to the Person or to an officer of the Person to whom the
same is directed, or (ii) when the same is actually received, if sent either by
registered or certified mail, postage and charges prepaid, or by facsimile, if
such facsimile is followed by a hard copy of the facsimile communication sent
promptly thereafter by registered or certified mail, postage and charges
prepaid, addressed as follows, or to such

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<Page>

other address as such Person may from time to time specify by notice to the
Members and Directors:

              (a)   If to the Joint Sales Company:

                    ADM / Metabolix Sales Company, LLC
                    21 Erie Street
                    Cambridge, MA 02139-4260

                    With a copy to:

                    ADM Polymer Corporation, at the address set forth below, and
                    MBX, at the address set forth below

              (b)   If to the Directors, to the address set forth in Exhibit C
hereto with respect to the initial Directors, and thereafter in the notices
provided to the Joint Sales Company by the Members designating substitute
Directors;

              (c)   If to ADM Polymer Corporation:

                    Archer-Daniels-Midland Company
                    4666 Faries Parkway
                    Decatur, Illinois 62526
                    Attn:  President
                    Telephone:  (217) 451-5200
                    Facsimile:  (217) 451-4181

                    With a copy to:

                    Archer-Daniels-Midland Company
                    4666 Faries Parkway
                    Decatur, Illinois 62526
                    Attn:  General Counsel
                    Telephone:  (217) 424-6183
                    Facsimile:  (217) 424-6196

              (d)   If to MBX:

                    Metabolix Inc.
                    21 Erie Street
                    Cambridge, Massachusetts 02139-4260
                    Attn:  President and CEO
                    Telephone: (617) 492-0505
                    Facsimile:  617) 4921996

* CONFIDENTIAL TREATMENT REQUESTED

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                    With a copy to:

                    Goodwin Procter
                    Exchange Place
                    53 State Street
                    Boston, MA 02109
                    Attn:  Christopher J. Denn, Esq

       13.2   BINDING EFFECT.

              Except as otherwise provided in this Agreement, every covenant,
term, and provision of this Agreement shall be binding upon and inure to the
benefit of the Members and their respective successors, transferees, and
assigns.

       13.3   CONSTRUCTION.

              Every covenant, term, and provision of this Agreement shall be
construed simply according to its fair meaning and not strictly for or against
any Member.

       13.4   TIME.

              In computing any period of time pursuant to this Agreement, the
day of the act, event or default from which the designated period of time begins
to run shall not be included, but the time shall begin to run on the next
succeeding day. The last day of the period so computed shall be included, unless
it is a Saturday, Sunday or legal holiday, in which event the period shall run
until the end of the next day which is not a Saturday, Sunday or legal holiday.

       13.5   HEADINGS.

              Section and other headings contained in this Agreement are for
reference purposes only and are not intended to describe, interpret, define, or
limit the scope, extent, or intent of this Agreement or any provision hereof.

       13.6   SEVERABILITY.

              Except as otherwise provided in the succeeding sentence, every
provision of this Agreement is intended to be severable, and, if any term or
provision of this Agreement is illegal or invalid for any reason whatsoever,
such illegality or invalidity shall not affect the validity or legality of the
remainder of this Agreement. The preceding sentence of this Section 13.6 shall
be of no force or effect if the consequence of enforcing the remainder of this
Agreement without such illegal or invalid term or provision would be to cause
any Member to lose the material benefit of its economic bargain.

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       13.7   INCORPORATION BY REFERENCE.

              Every exhibit, schedule, and other appendix attached to this
Agreement and referred to herein is not incorporated in this Agreement by
reference unless this Agreement expressly otherwise provides.

       13.8   VARIATION OF TERMS.

              All terms and any variations thereof shall be deemed to refer to
masculine, feminine, or neuter, singular or plural, as the identity of the
Person or Persons may require.

       13.9   GOVERNING LAW.

              The laws of the State of Delaware shall govern the validity of
this Agreement, the construction of its terms, and the interpretation of the
rights and duties arising hereunder.

       13.10  COUNTERPART EXECUTION.

              This Agreement may be executed in any number of counterparts with
the same effect as if all of the Members had signed the same document. All
counterparts shall be construed together and shall constitute one agreement.

                      [SIGNATURES FOLLOW ON SEPARATE PAGES]

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     IN WITNESS WHEREOF, the parties have executed and entered into this
Operating Agreement of the Joint Sales Company as of the day first above set
forth.

                         METABOLIX INC.

                         By: /s/ James J. Barber
                             ----------------------------------------

                          Name: James J. Barber
                               --------------------------------------

                          Title: President and CEO
                                -------------------------------------

                         ADM POLYMER CORPORATION

                         By: /s/ John D. Rice
                             ----------------------------------------

                          Name: John D. Rice
                               --------------------------------------

                          Title: President
                                -------------------------------------

* CONFIDENTIAL TREATMENT REQUESTED

                                       54<Page>

                                                                    Exhibit 10.7

                          [METABOLIX, Inc. Letterhead]

                                November 3, 2004

Archer-Daniels-Midland-Company
4666 Faries Parkway
Decatur, IL  62526

Ladies and Gentlemen:

     This letter is intended to set forth certain understandings between the
undersigned Metabolix, Inc. ("MBX") and Archer-Daniels-Midland Company ("ADM")
in connection with the Technology Alliance Agreement (the "Technology Alliance
Agreement") entered into by and between MBX and ADM Polymer Corporation, a
Delaware corporation and wholly-owned subsidiary of ADM ("ADM Sub") and the
Commercial Alliance Agreements to be entered into, if at all, by and among MBX,
ADM Sub and the Joint Sales Company upon completion of the activities described
in the Technology Alliance Agreement. Capitalized terms used but not defined
herein shall have the definitions provided in the Commercial Alliance Agreement.

     Under the Technology Alliance Agreement, ADM Sub has certain obligations to
MBX (the "Technology Alliance Obligations"), including without limitation, the
following obligations (which are set forth for informational purposes and are
not to amend the terms set forth in the Technology Alliance Agreement or to
inform the interpretation of such terms): (i) to pay the amounts indicated in
Article 5 and (ii) to provide indemnification as set forth in Article 10. Under
the Commercial Alliance Agreements, ADM Sub has certain obligations to MBX
and/or the Joint Sales Company (the "Commercial Alliance Obligations" and
together with the Technology Alliance Obligations, the "Obligations"), including
without limitation, the following obligations (which are set forth for
informational purposes and are not to amend the terms set forth in the
Commercial Alliance Agreements or to inform the interpretation of such terms):
(i) to provide certain licenses to MBX and the Joint Sales Company to ADM
Technology, which is defined to include Technology Controlled by ADM, (ii) to
construct the ADM Sub Manufacturing Facility, (iii) to make an investment of
capital in the Joint Sales Company; (iv) to provide indemnification as set forth
in Article 12 of the Commercial Alliance Agreement, (v) to manufacture PHA
Material for sale to the Joint Sales Company during the Term, and under certain
circumstances, after the Term for sale to MBX, pursuant to the Manufacturing
Agreement, and (vi) to finance certain cash requirements of the Joint Sales
Company pursuant to the Loan and Security Agreement.

     As a condition to the execution and delivery by MBX of the Technology
Alliance Agreement and the Commercial Alliance Agreements, ADM, by signing a
copy of this letter agrees to the following:

<Page>

     1.   If ADM Sub materially defaults on any material Obligation, ADM shall
be directly liable to MBX for the performance of such Obligations, and shall
perform such Obligations, upon demand by MBX.

     2.   The obligations of ADM set forth in this letter are independent of the
Obligations of ADM Sub, and a separate action or actions may be brought and
prosecuted against ADM, whether action is brought against any ADM Sub or whether
such ADM Sub be joined in any such action or actions.

     3.   ADM waives any right to require MBX to proceed against ADM Sub for
performance of any Obligation after a failure to perform as provided in the
Technology Alliance Agreement or the relevant Commercial Alliance Agreement, as
applicable. With respect only to MBX and its successors and assigns, ADM waives
any defense arising out of the absence, impairment or loss of any right of
reimbursement or subrogation or any other rights against ADM Sub.

     4.   If ADM Sub is adjudicated bankrupt or files a petition for
reorganization, arrangement, composition or similar relief under any present or
future provision of the United States Bankruptcy Code, or if such a petition is
filed against ADM Sub, and in any such proceeding some or all of any
indebtedness or Obligations are terminated or rejected or any Obligation is
modified or abrogated, or if the Obligations are otherwise avoided for any
reason, ADM agrees that ADM's liability hereunder shall not thereby be affected
or modified and such liability shall continue in full force and effect as if no
such action or proceeding had occurred. This letter agreement shall continue to
be effective or be reinstated, as the case may be, if any payment must be
returned by MBX upon the insolvency, bankruptcy or reorganization of ADM Sub, as
though such payment had not been made.

     5.   ADM hereby agrees that any breach by it of its obligations under this
letter agreement shall constitute a material breach by ADM Sub of a material
obligation under the Technology Alliance Agreement and Commercial Alliance
Agreements, subject to all applicable cure provisions.

     6.   ADM agrees to pay reasonable attorneys' fees and all other costs and
expenses which may be incurred by MBX in the enforcement of this letter
agreement except those costs and expenses that may be incurred by MBX in an
action arising out of the breach by ADM Sub of an Obligation, which action MBX
brings directly against ADM, without having first taken action against ADM Sub
and obtained a final judgment where all appeal rights have been exhausted or
expired. No terms or provisions of this letter agreement may be changed, waived,
revoked or amended without ADM's and MBX's prior written consent. Should any
provision of this letter agreement be determined by a court of competent
jurisdiction to be unenforceable, all of the other provisions shall remain
effective. This letter agreement embodies the entire agreement among the parties
hereto with respect to the matters set forth herein, and supersedes all prior
agreements among the parties with respect to the matters set forth herein. No
course of prior dealing among the parties, no usage of trade, and no parol or
extrinsic evidence of any nature shall be used to supplement, modify or vary any
of the terms hereof.

                                        2
<Page>

     7.   ADM represents and warrants to MBX that (i) ADM has taken all
necessary and appropriate action to authorize the execution, delivery and
performance of this letter agreement, and (ii) this letter agreement constitutes
a valid and binding obligation, enforceable against ADM in accordance with its
terms. ADM further hereby represents, warrants and covenants that it shall not
convey or transfer any of its ownership interest in ADM Sub, or allow ADM Sub to
issue any securities of ADM Sub, including without limitation, equity
securities, securities that are convertible into equity securities, or any
option or right to purchase or receive any of the foregoing, to any other person
or entity, such that ADM would own less than: (i) fifty one percent (51%) of the
total equity interest of ADM Sub or (ii) fifty one percent (51%) of the total
voting rights of each class of equity securities of ADM Sub. ADM acknowledges
that it is an Affiliate of ADM Sub for the purposes of the Technology Alliance
Agreement and the Commercial Alliance Agreements and it agrees to be bound by
those restrictions and obligations that are imposed upon Affiliates of ADM Sub
under those agreements, including without limitation, the obligations and
restrictions set forth in Articles 6 and 7 of the Technology Alliance Agreement
and Articles 8 and 13 of the Commercial Alliance Agreement.

     Except as expressly provided in this Agreement with respect to the Joint
Sales Company: (i) the provisions of this letter are for the benefit of the
parties hereto and not for any other person; and (ii) this letter shall not
provide any third person with any remedy, claim, reimbursement, claim of action
or other right in excess of those existing without reference to this letter.

                              [Intentionally Blank]

                                        3
<Page>

     Please sign below to evidence ADM's agreement that we intend for this
letter agreement to be a binding contract between us governed by the laws of the
State of Delaware.

                                            Very truly yours,

                                            METABOLIX, INC.

                                            By: /s/ James J. Barber
                                               -------------------------------

                                                James J. Barber

                                                President and CEO

Agreed:

Archer-Daniels-Midland Company

By:  /s/ John D. Rice
     ------------------------

Name: John D. Rice
     ------------------------

Title: Senior Vice President
      -----------------------
         duly authorized

                                        4

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00106-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00106-of-00352.parquet"}]]