Document:

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                                                                   Exhibit 10.37

                             AMPHORA DISCOVERY CORP.

              KNIGHTON FOUNDER RESTRICTED STOCK PURCHASE AGREEMENT

        This Restricted Stock Purchase Agreement (the "Agreement") is entered
into as of October 14, 2001, by and between Amphora Discovery Corp., a Delaware
corporation (the "Company"), and James L. Knighton ("Purchaser").

        Whereas in order to give the Purchaser an opportunity to acquire an
equity interest in the Company and in connection with the Consulting Agreement,
dated as of even date hereof, between the Company and the Purchaser (the
"Consulting Agreement"), the Company is willing to sell to the Purchaser and the
Purchaser desires to purchase shares of Common Stock according to the terms and
conditions contained herein.

        Therefore, in consideration of the mutual covenants and representations
set forth herein and in the Consulting Agreement, the Company and the Purchaser
agree as follows:

        1.     SALE OF STOCK. The Company hereby agrees to sell to Purchaser and
Purchaser hereby agrees to purchase an aggregate of 450,000 shares of the
Company's Common Stock (the "Shares"), at a purchase price of $0.10 per share
(the "Purchase Price") representing the current fair market value of such shares
as determined by the Company's Board of Directors, for an aggregate purchase
price of $45,000.00.

        2.     PAYMENT OF PURCHASE PRICE. The Purchase Price for the Shares
shall be paid, in part, by delivery to the Company at the time of execution of
this Agreement of a check in the amount of $450.00 made payable to the Company,
and the remainder of the Purchase Price shall be paid by cancellation of all
amounts owed by the Company to the Purchaser for services rendered by the
Purchaser to the Company prior to the date hereof, including, but not limited
to, services provided by the Purchaser in connection with the formation and
funding of the Company.

        3.     DEFINITIONS.

               (a)    "Shares" refers to the purchased Shares and all shares
received in respect thereof as a consequence of stock dividends, stock splits,
reverse stock splits, recapitalizations, mergers, reorganizations or the like,
and all new, substituted or additional securities or other properties to which
Purchaser is or may be entitled by reason of Purchaser's ownership of the
Shares.

               (b)    "Unvested Shares" shall mean any of the Shares subject to
the Company's Repurchase Option described in Section 5 which have not yet been
released pursuant to Section 4 below from such Repurchase Option.

               (c)    "Repurchase Option" shall have the meaning set forth in
Section 5.

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               (d)    "Cause" shall mean any of the following: (i) the willful
failure by Purchaser to substantially perform its duties with the Company (other
than due to Purchaser's incapacity as a result of physical or mental illness);
(ii) the willful engaging by Purchaser in conduct which is determined by the
Board of Directors of the Company to be materially adverse to the Company, its
business or reputation, or which constitutes gross misconduct; (iii) Purchaser's
material breach of the terms of this Agreement, the Consulting Agreement, or any
other agreements between the Purchaser and the Company; (iv) Purchaser's refusal
to serve as a member of the Board of Directors of the Company if requested by
the Company; (v) Purchaser's voluntary termination of the Consulting Agreement;
or (vi) Purchaser's conviction for or admission or plea of no contest with
respect to a felony involving moral turpitude, an act of fraud against the
Company, the misappropriation of material property belonging to the Company or
an act of violence against an officer, director, employee or consultant of the
Company; provided, however, that in the event that any of the foregoing events
in (i) (ii) or (iii) is capable of being cured, the Company shall provide
written notice to Purchaser describing the nature of such event, and Purchaser
shall thereafter have thirty (30) business days from the date of delivery of
such notice to cure such event.

        4.     VESTING. The Shares shall vest and be released from the Company's
Repurchase Option in accordance with the following provisions:

               (a)    One Hundred percent (100%) of the Shares shall be subject
to the Company's Repurchase Option as of the date hereof. The Shares subject to
the Repurchase Option shall be released from such Repurchase Option as follows:
(i) Fifty percent (50%) of the Shares shall be released as of the date of the
closing of the Company's proposed Series A Preferred Stock financing (the
"Vesting Start Date"); (ii) One-ninety-sixth (1/96) of the Shares shall be
released one (1) month after the Vesting Start Date; and (iii) an additional
one-ninety-sixth (1/96) of the subject Shares shall be released each full month
thereafter, provided that Purchaser continues to remain available to serve as a
member of the Company's Board of Directors or provide advisory services to the
Company (the "Services") during such period. If the Services of the Purchaser
are terminated by the Company other than for Cause, all Shares shall be
immediately released from the Company's Repurchase Option. The Shares which have
been released from the Company's Repurchase Option shall be delivered to the
Purchaser at the Purchaser's request

        5.     REPURCHASE OPTION.

               (a)    Repurchase. Effective as of the date (the "Expiration
Date") that the Purchaser voluntarily ceases providing Services to the Company
or if the Services are terminated by the Company for Cause, the Company or its
assignee shall have an irrevocable, exclusive option (the "Repurchase Option")
for a period of ninety (90) days from the Expiration Date to repurchase at the
Purchase Price up to that number of shares which shall constitute Unvested
Shares as of the Expiration Date.

               (b)    Mechanics of Repurchase. In order to exercise the
Repurchase Option, the Company shall deliver written notice of exercise to
Purchaser within the time period specified in paragraph 5(a) above. The Company
shall pay to Purchaser within the time period specified in paragraph 5(a), the
aggregate repurchase price by check. Upon delivery of such notice, (i) the
Company or its assignee shall become the legal and beneficial owner of the
Shares being

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repurchased and all rights and interests therein or relating thereto; (ii) the
Company shall have the right to retain and transfer to its own name or the name
of its assignee the repurchased Shares; and (iii) Purchaser shall retain solely
the right to receive the payment for the Shares so repurchased.

        6.     RESTRICTIONS ON TRANSFER. Except for the transfer of the Shares
to the Company or its assignee as contemplated by this Agreement, no Shares or
any beneficial interest therein shall be transferred, encumbered or otherwise
disposed of in any way until the release of such Shares from the Repurchase
Option in accordance with the provisions of this Agreement, provided that the
Purchaser may transfer all or any of the shares subject to the Repurchase Option
to its spouse, children, parents or any other member of his immediate family,
siblings, parents of siblings and siblings of spouse, or any trust or trust for
their benefit, as long as any such transferee agrees in writing to be bound by
this Agreement to the same extent as the Purchaser and executes such other
documentation as may reasonably be requested by the Company or its legal counsel
in connection with such transfer.

        7.     LEGENDS. The share certificate evidencing the Shares issued
hereunder shall be endorsed with the following restrictive legends (in addition
to any legend required under applicable state securities laws):

        THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ACQUIRED FOR
        INVESTMENT AND NOT WITH A VIEW TO, OR IN CONNECTION WITH, THE SALE OR
        DISTRIBUTION THEREOF, AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
        ACT OF 1933. SUCH SHARES MAY NOT BE SOLD OR TRANSFERRED IN THE ABSENCE
        OF SUCH REGISTRATION OR UNLESS THE COMPANY RECEIVES AN OPINION OF
        COUNSEL REASONABLY ACCEPTABLE TO IT SAYING THAT SUCH SALE OR TRANSFER IS
        EXEMPT FROM THE REGISTRATION AND PROSPECTUS DELIVERY REQUIREMENTS OF
        SAID ACT.

        THE SHARES REPRESENTED HEREBY ARE SUBJECT TO CERTAIN RESTRICTIONS UPON
        TRANSFER AND RIGHTS OF REPURCHASE AS SET FORTH IN AN AGREEMENT BETWEEN
        THE COMPANY AND THE STOCKHOLDER, A COPY OF WHICH IS AVAILABLE UPON THE
        REQUEST OF THE REGISTERED HOLDER HEREOF TO THE SECRETARY OF THE COMPANY.

        8.     ADJUSTMENTS FOR STOCK SPLITS, ETC. All references to the number
of Shares and the purchase price of the Shares in this Agreement shall be
appropriately adjusted to reflect any stock dividend, stock split,
recapitalization, merger, reorganization or other change in the Shares which may
be made by the Company after the date of this Agreement.

        9.     ESCROW. As security for the faithful performance of this
Agreement, Purchaser agrees, immediately upon receipt of the certificate(s)
evidencing the Shares, to deliver such certificate(s), together with a stock
power and assignment in the form attached hereto as Exhibit 2, executed by
Purchaser (with the date and number of Shares left blank), to the Secretary of
the Company ("Escrow Agent"). Escrow Agent shall hold such Shares pursuant to an
escrow agreement in the form attached hereto as Exhibit 1, by which Escrow Agent
shall be authorized to take all such actions and to effectuate all such
transfers and/or releases of such Shares as are in accordance with

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the terms of this Agreement. The Shares shall be released from escrow upon
termination of the Repurchase Option provided for in Section 5.

        10.    MARKET STAND-OFF AGREEMENT. Purchaser and each transferee of the
Shares issued hereunder agrees by acceptance hereof or thereof not to sell, make
a short sale of, loan, grant any option for the purchase of, or otherwise
dispose of any shares of Common Stock of the Company held by Purchaser without
the prior written consent of the Company or the underwriters managing the
initial underwritten public offering of the Company's securities, for such
period of time (not to exceed one hundred eighty (180) days) as may be requested
by the Company and the managing underwriter, and further agrees to execute any
agreement reflecting the above provision as may be requested by the underwriters
at the time of any such initial public offering.

        11.    PURCHASER'S REPRESENTATIONS. In connection with the Purchaser's
purchase of the Shares, the Purchaser hereby represents and warrants to the
Company as follows:

               (a)    Investment Intent. Capacity to Protect Interests. The
Purchaser is purchasing the Shares solely for her own account for investment and
not with a view to or for sale in connection with any distribution of the Shares
or any portion thereof and not with any present intention of selling, offering
to sell or otherwise disposing of or distributing the Shares or any portion
thereof in any transaction other than a transaction exempt from registration
under the Securities Act of 1933, as amended (the "Act"). The Purchaser also
represents that the entire legal and beneficial interest of the Shares is being
purchased, and will be held, for the Purchaser's account only, and neither in
whole or in part for any other person. Purchaser either has a pre-existing
business or personal relationship with the Company and has the capacity to
evaluate the merits and risks of an investment in the Company and to protect
Purchaser's own interests in connection with this transaction.

               (b)    Residence. The Purchaser's principal residence is located
at the address indicated beneath the Purchaser's signature below.

               (c)    Information Concerning the Company. The Purchaser has
heretofore discussed the Company and its plans, operations and financial
condition with the Company's officers and has heretofore received all such
information as the Purchaser has deemed necessary and appropriate to enable the
Purchaser to evaluate the financial risk inherent in making an investment in the
Shares, and the Purchaser has received satisfactory and complete information
concerning the business and financial condition of the Company in response to
all inquiries in respect thereof.

               (d)    Economic Risk. The Purchaser realizes that the purchase of
the Shares will be a highly speculative investment and involves a high degree of
risk, and the Purchaser is able, without impairing financial condition, to hold
the Shares for an indefinite period of time and to suffer a complete loss on the
Purchaser's investment.

               (e)    Restricted Securities. The Purchaser understands and
acknowledges that:

                      (i)    the sale of the Shares has not been registered
under the Act, and the Shares must be held indefinitely unless subsequently
registered under the Act or an exemption from such registration is available and
the Company is under no obligation to register the Shares;

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                      (ii)   the share certificate representing the Shares will
be stamped with the legends specified in Section 7 hereof; and

                      (iii)  the Company will make a notation in its records of
the aforementioned restrictions on transfer and legends.

               (f)    Disposition under Rules 144 and 701. The Purchaser
understands that the Shares are restricted securities within the meaning of Rule
144 promulgated under the Act; that the exemption from registration under Rule
144 will not be available in any event for at least one (1) year from the date
of purchase and payment of the Shares (unless Rule 701 promulgated under the Act
is available), and even then will not be available unless (i) a public trading
market then exists for the Common Stock of the Company; (ii) adequate
information concerning the Company is then available to the public; and (iii)
other terms and conditions of Rule 144 are complied with; and that any sale of
the Shares may be made only in limited amounts in accordance with such terms and
conditions.

        The Purchaser understands that the resale provisions of Rule 701, if
available, will not apply until ninety (90) days after the Company becomes
subject to reporting obligations under the Exchange Act. There can be no
assurance that the requirements of Rule 144 or Rule 701 will be met, or that the
Shares will ever be saleable.

               (g)    Section 83(b) Election. The Purchaser understands that
Section 83 of the Internal Revenue Code of 1986, as amended (the "Code"), taxes
as ordinary income the difference between the amount paid for the Shares and the
fair market value of the Shares as of the date any restrictions on the Shares
lapse. In this context, "restriction" means the right of the Company to buy back
the stock pursuant to the Repurchase Option. The Purchaser understands that he
may elect to be taxed at the time the Shares are purchased rather than when and
as the Repurchase Option expires by filing an election under Section 83(b) of
the Code with the I.R.S. within thirty (30) days from the date of purchase. Even
if the fair market value of the Shares equals the amount paid for the Shares,
the election must be made to avoid adverse tax consequences in the future. The
form for making this election is attached as Exhibit 3 hereto. The Purchaser
understands that failure to make this filing timely will result in the
recognition of ordinary income by the Purchaser, as the Repurchase Option
lapses, on the difference between the purchase price and the fair market value
of the Shares at the time such restrictions lapse.

        THE PURCHASER ACKNOWLEDGES THAT IT IS THE PURCHASER'S SOLE
        RESPONSIBILITY AND NOT THE COMPANY'S TO FILE TIMELY THE ELECTION UNDER
        SECTION 83(b), EVEN IF THE PURCHASER REQUESTS THE COMPANY OR ITS
        REPRESENTATIVES TO MAKE THIS FILING ON THE PURCHASER'S BEHALF.

        12.     GENERAL PROVISIONS.

               (a)    This Agreement shall be governed by and construed and
enforced in accordance with the laws of the State of California as they apply to
contracts entered into and wholly to be performed within such state.

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               (b)    This Agreement, including its Exhibits, represents the
entire agreement between the parties with respect to the purchase of the Shares
by the Purchaser.

               (c)    Any notice, demand or request required or permitted to be
given by either the Company or Purchaser pursuant to the terms of this Agreement
shall be in writing and shall be deemed given when delivered, if delivered
personally; three (3) business days after the business day of deposit in the
U.S. mail, by registered or certified mail with postage prepaid; one (1)
business day after the business day of facsimile transmission, if a confirmation
copy is sent by first class mail with postage prepaid; or, one (1) business day
after the business day of deposit with Federal Express or similar overnight
carrier, freight prepaid; in any such case addressed to any party at such
party's address as set forth at the end of this Agreement or such other address
as the party may designate by notifying the other in writing.

               (d)    The rights and benefits of the Company under this
Agreement shall be transferable to any one or more persons or entities, and all
covenants and agreements hereunder shall inure to the benefit of, and be
enforceable by the Company's successors and assigns. The rights and obligations
of Purchaser under this Agreement may only be assigned with the prior written
consent of the Company.

               (e)    Either party's failure to enforce any provision or
provisions of this Agreement shall not in any way be construed as a waiver of
any such provision or provisions, nor prevent that party from thereafter
enforcing each and every other provision of this Agreement. The rights granted
both parties herein are cumulative and shall not constitute a waiver of either
party's right to assert all other legal remedies available to it under the
circumstances.

               (f)    Purchaser agrees upon request to execute any further
documents or instruments necessary or desirable to carry out the purposes or
intent of this Agreement.

                                     * * * *

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   By Purchaser's signature below, Purchaser represents that Purchaser hereby
        accepts this Agreement subject to all of the terms and provisions
         thereof. Purchaser has reviewed this Agreement in its entirety,
          has had an opportunity to obtain the advice of counsel prior
                to executing this Agreement and fully understands
                        all provisions of this Agreement.

"COMPANY"

AMPHORA DISCOVERY CORP.

By: /s/ Martin Haslanger
    -----------------------------------

Name: Martin Haslanger
      ---------------------------------

Title: President & CEO
       --------------------------------

"PURCHASER"

/s/ James L. Knighton
---------------------------------------

James L. Knighton
---------------------------------------

153 Terrace Dr., S.F., CA 94127
---------------------------------------
Residence Address

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                                CONSENT OF SPOUSE

        The undersigned spouse of James L. Knighton has read and approves the
foregoing Agreement. In consideration of the Company's granting my spouse the
right to purchase the Shares as set forth in the Agreement, the undersigned
hereby agrees to be irrevocably bound by the Agreement and further agrees that
any community property interest shall be similarly bound by the Agreement. I
hereby appoint my spouse as my attorney-in-fact with respect to any amendment or
exercise of any right under the Agreement.

                                           /s/ Petree Knighton
                                        ---------------------------------------

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                                    EXHIBIT 1

                            JOINT ESCROW INSTRUCTIONS

                                                                October 14, 2001

Secretary
Amphora Discovery Corp.
c/o Wilson Sonsini Goodrich & Rosati
650 Page Mill Road
Palo Alto, CA 94304-1050

Dear Sir:

        As Escrow Agent for both Amphora Discovery Corp., a Delaware Corporation
(the "Company"), and the undersigned purchaser of stock of the Company (the
"Purchaser"), you are hereby authorized and directed to hold the documents
delivered to you pursuant to the terms of that certain Restricted Stock Purchase
Agreement (the "Agreement") between the Company and the undersigned, to which a
copy of these Joint Escrow Instructions is attached as Exhibit 1, in accordance
with the following instructions:

        1.     In the event the Company and/or any assignee of the Company
(referred to collectively for convenience herein as the "Company") exercises the
Repurchase Option set forth in the Agreement, the Company shall give to
Purchaser and you a written notice specifying the number of shares of stock to
be purchased, the purchase price, and the time for a closing hereunder at the
principal office of the Company. Purchaser and the Company hereby irrevocably
authorize and direct you to close the transaction contemplated by such notice in
accordance with the terms of the notice.

        2.     At the closing, you are directed (a) to date the stock
assignments necessary for the transfer in question, (b) to fill in the number of
shares being transferred, and (c) to deliver the same, together with the
certificate evidencing the shares of stock to be transferred, to the Company or
its assignee, in accordance with the Agreement, against the simultaneous
delivery to you of the purchase price (by check) for the number of shares of
stock being purchased pursuant to the exercise of the Repurchase Option.

        3.     Purchaser irrevocably authorizes the Company to deposit with you
any certificates evidencing shares of stock to be held by you hereunder and any
additions and substitutions to the shares as defined in the Agreement. Purchaser
does hereby irrevocably constitute and appoint you as her attorney-in-fact and
agent for the term of this escrow to execute with respect to such securities all
documents necessary or appropriate to make such securities negotiable and to
complete any transaction herein contemplated. Subject to the provisions of this
paragraph 3, Purchaser shall exercise all rights and privileges of a stockholder
of the Company while the stock is held by you.

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        4.     Upon written request of Purchaser, but no more than once each
year, unless the Repurchase Option has been exercised, you will deliver to
Purchaser a certificate or certificates representing so many shares of stock as
are not then Unvested Shares subject to the Repurchase Option. Within one
hundred twenty (120) days after cessation of Purchaser's employment with or
services to the Company, you will deliver to Purchaser a certificate or
certificates representing the aggregate number of shares sold and issued
pursuant to the Agreement and not purchased by the Company or its assignees
pursuant to exercise of the Repurchase Option.

        5.     Your duties hereunder may be altered, amended, modified or
revoked only by a writing signed by all of the parties hereto.

        6.     You shall be obligated only for the performance of such duties as
are specifically set forth herein and may rely and shall be protected in relying
or refraining from acting on any instrument reasonably believed by you to be
genuine and to have been signed or presented by the proper party or parties. You
shall not be personally liable for any act you may do or omit to do hereunder as
Escrow Agent or as attorney-in-fact for Purchaser while acting in good faith,
and any act done or omitted by you pursuant to the advice of your own attorneys
shall be conclusive evidence of such good faith.

        7.     You are hereby expressly authorized to disregard any and all
warnings given by any of the parties hereto or by any other person or
corporation and are hereby expressly authorized to comply with and obey orders,
judgments or decrees of any duly approved arbitrator or court of competent
jurisdiction. In case you obey or comply with any such order, judgment or
decree, you shall not be liable to any of the parties hereto or to any other
person, firm or corporation by reason of such compliance, notwithstanding any
such order, judgment or decree being subsequently reversed, modified, annulled,
set aside, vacated or found to have been entered without jurisdiction.

        8.     You shall not be liable in any respect on account of the
identity, authorities or rights of the parties executing or delivering or
purporting to execute or deliver the Agreement or any documents or papers
deposited or called for hereunder.

        9.     You shall not be liable for the outlawing of any rights under any
applicable statute of limitations with respect to these Joint Escrow
Instructions or any documents deposited with you.

        10.    You shall be entitled to employ such legal counsel and other
experts as you may deem necessary properly to advise you in connection with your
obligations hereunder, may rely upon the advice of such counsel, and may pay
such counsel reasonable compensation therefor.

        11.    Your responsibilities as Escrow Agent hereunder shall terminate
if you shall cease to be an officer of the Company or if you shall resign by
written notice to each party. In the event of any such termination, the Company
shall appoint a successor Escrow Agent.

        12.    If you reasonably require other or further instruments in
connection with these Joint Escrow Instructions or obligations in respect
hereto, the necessary parties hereto shall join in furnishing such instruments.

        13.    It is understood and agreed that should any dispute arise with
respect to the delivery and/or ownership or right of possession of the
securities held by you hereunder, you are authorized

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and directed to retain in your possession without liability to anyone all or any
part of said securities until such disputes shall have been settled either by
mutual written agreement of the parties concerned or by a final order, decree or
judgment of a duly appointed arbitrator or court of competent jurisdiction after
the time for appeal has expired and no appeal has been perfected, but you shall
be under no duty whatsoever to institute or defend any such proceedings.

        14.    At the option of either the Company or Purchaser, any and all
disputes or controversies arising from or respecting this agreement shall be
decided by binding arbitration under the rules of the American Arbitration
Association. The arbitration shall require one arbitrator. Arbitration shall
take place in Santa Clara County, California or any other location mutually
agreeable to the parties. At the request of either party, arbitration
proceedings will be conducted in the utmost secrecy. The arbitrator shall be
able to decree any and all relief of an equitable nature and to award damages,
with or without an accounting and costs. The decree of judgment of an award
rendered by the arbitrator may be entered in any court of competent
jurisdiction.

        15.    Any notice required or permitted hereunder shall be given in
writing and shall be deemed effectively given when delivered, if given by
personal delivery: three (3) business days after the business day of deposit in
the United States Post Office, by registered or certified mail with postage and
fees prepaid; one (1) business day after the business day of facsimile
transmission, if a confirmation copy is sent via first class mail, postage
prepaid; or one (1) business day after the business day of deposit with Federal
Express or similar overnight carrier, freight prepaid; in any such case
addressed to each of the other parties thereunto entitled at the addresses
indicated in the Company's records, or at such other addresses as a party may
designate by ten (10) days advance written notice to each of the other parties
hereto.

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        16.    By signing these Joint Escrow Instructions, you become a party
hereto only for the purpose of said Joint Escrow Instructions; you do not become
a party to the Agreement. This instrument shall be binding upon and inure to the
benefit of the parties hereto, and their respective successors and permitted
assigns.

                                        Very truly yours,

                                        COMPANY:

                                        AMPHORA DISCOVERY CORP.
                                        A Delaware Corporation

                                        By: /s/ Martin Haslanger
                                            -----------------------------------

                                        Title: President & CEO
                                               --------------------------------

                                        PURCHASER:

                                        /s/ James L. Knighton
                                        ---------------------------------------
                                        (Signature)

                                        James L. Knighton
                                        ---------------------------------------
                                        (Print Name)

ESCROW AGENT:

   /s/ Michael O'Donnell
--------------------------------
Secretary

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                                    EXHIBIT 2

                           STOCK POWER AND ASSIGNMENT

                            SEPARATE FROM CERTIFICATE

        FOR VALUE RECEIVED and pursuant to that certain Restricted Stock
Purchase Agreement dated as of ___________, 20____ the undersigned hereby sells,
assigns and transfers unto ___________________________________________________,
shares of the Common Stock of Amphora Discovery Corp., a Delaware Corporation
(the "Company"), standing in the undersigned's name on the books of the Company
represented by Certificate No. _____ delivered herewith, and does hereby
irrevocably constitute the Secretary of the Company as attorney-in-fact, with
full power of substitution, to transfer said stock on the books of the Company.

Dated: ___________________, 20___

                                        _______________________________________
                                        (Signature)

                                        _______________________________________
                                        (Print Name)

This Stock Power may only be utilized for the repurchase of Shares by the
Company in accordance with the provisions of the Restricted Stock Purchase
Agreement dated as of ____________, 20____ by and between the signatory hereto
and the Company.

<PAGE>

                                    EXHIBIT 3

                         ELECTION UNDER SECTION 83(b) OF

                        THE INTERNAL REVENUE CODE OF 1986

        The undersigned Taxpayer hereby elects, pursuant to the provisions of
Sections 55-56 and 83(b) of the Internal Revenue Code of 1986, as amended, to
include in alternative minimum taxable income for the Taxpayer's current taxable
year, as compensation for services, the excess, if any, of the fair market value
of the property described below at the time of transfer over the amount paid for
such property.

1.   TAXPAYER'S NAME:                __________________________________________

     SPOUSE'S NAME:                  __________________________________________

     TAXPAYER'S ADDRESS:             __________________________________________

     SPOUSE'S ADDRESS:               __________________________________________

                                     __________________________________________

     TAXPAYER IDENTIFICATION NUMBER: __________________________________________

     SPOUSE IDENTIFICATION NUMBER:   __________________________________________

2.   The property with respect to which the election is made is described as
follows: 450,000 shares of Common Stock of Amphora Discovery Corp., a Delaware
Corporation (the "Company"), which is the corporation for whom the Taxpayer has
performed services.

3.   The date on which the shares were transferred was _____________, 20____,
and this election is made for calendar year 20____.

4.   The shares are subject to the following restrictions: The Company may
repurchase all or a portion of the shares at the Taxpayer's original purchase
price under certain conditions at the time of termination of services by the
Purchaser to the Company.

5.   The fair market value of the shares (without regard to restrictions other
than restrictions which by their terms will never lapse) was $0.10 per share at
the time of transfer.

6.   The amount (if any) paid for such shares was $0.10 per share.

7.   The Taxpayer has submitted a copy of this statement to the Company as the
Taxpayer's employer or the corporation for whom the Taxpayer has performed
services.

<PAGE>

THIS ELECTION MUST BE FILED WITH THE INTERNAL REVENUE SERVICE ("IRS") (AT THE
OFFICE WHERE THE TAXPAYER FILES ANNUAL INCOME TAX RETURNS) WITHIN 30 DAYS AFTER
THE DATE OF TRANSFER OF THE PROPERTY, AND MUST ALSO BE FILED WITH THE TAXPAYER'S
INCOME TAX RETURNS FOR THE CALENDAR YEAR ABOVE STATED. THE ELECTION CANNOT BE
REVOKED WITHOUT THE CONSENT OF THE IRS.

Dated: _________________________        _______________________________________
                                        Taxpayer's Signature

The undersigned spouse of Taxpayer joins in this election.

Dated: _________________________        _______________________________________
                                        Spouse's Signature

                                      -2-<PAGE>
CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS,
HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

                                                                  EXHIBIT 10.38

                              [Caliper Letterhead]

August 20, 2001

Dr. Richard D. DiMarchi
Group Vice President for Research Technologies and Product Development
Eli Lilly and Company
Lilly Corporate Center

Indianapolis, Indiana 46285

RE:  Technology Access Agreement Amendment

Dear Dr. DiMarchi:

        Further to our recent conversations, this Letter Amendment (the
"Amendment") sets forth certain changes that the parties wish to make to the
Technology Access Agreement by and between Caliper and Lilly dated August
12,1999 (the "Agreement"). Capitalized terms used herein but not defined shall
have the meaning ascribed to them in the Agreement. Except as set forth herein,
the terms of the Agreement shall remain in full force and effect.

        The parties acknowledge that the purpose of the Technology Access
Program has evolved from its focus on early product development and access to a
later-stage commercial relationship. The parties wish to reflect such changes in
the Agreement as follows: Lilly shall pay the Annual Subscription Fee for the
third Contract Year as set forth in Section 3.1.2 of the Agreement. In
consideration of the Annual Subscription Fee, (i) Lilly shall receive Caliper
assistance and support of [ * ] FTEs during the third Contract Year, and (ii)
Lilly shall have a [ * ] credit towards the purchase of Caliper products and
additional support and assistance services (at a rate of [ * ] per FTE per hour)
delivered during the third Contract Year. Such purchases shall be made pursuant
to Caliper's standard purchase order terms. The requirement in Section 2.3.1
that Caliper support and assistance not exceed [ * ] FTEs in any calendar
quarter is hereby waived only to the extent that Lilly purchases additional
support and assistance pursuant to the preceding sentence. During the third
Contract Year, Lilly will receive a [ * ] discount off of list price for
instruments and a [ * ] discount off of list price for datapoints. Lilly shall
pay list price for LabChips. Caliper's current product catalog and price list
from which Lilly may order products hereunder is attached hereto as Exhibit A.

[ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

<PAGE>

Please indicate your agreement to the foregoing terms by signing below where
indicated.

Sincerely,

CALIPER TECHNOLOGIES CORP.

By:  /s/   Michael R. Knapp Ph.D.
    -------------------------------------
    Name:  Michael R. Knapp Ph.D.
    Title: Vice President Corporate Development

ACCEPTED AND AGREED:
ELI LILLY AND COMPANY

By:   /s/  Richard D. DiMarchi Ph.D.
    -------------------------------------
    Name:  Richard D. DiMarchi Ph.D.
    Title: Group Vice President, Res. Tech, Product Dev. And Project Mgmt.

[ * ] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY
BRACKETS, HAS BEEN OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24b-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED.

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