Document:

COLLEXIS, INC.
                    AMENDED AND RESTATED EMPLOYMENT AGREEMENT

            THIS AMENDED AND RESTATED EMPLOYMENT AGREEMENT ("Agreement") is
entered into as of April ___, 2006 (the "Signing Date") by and between Collexis
BV, a Netherlands company ("BV"), and Collexis, Inc., a Delaware corporation and
wholly-owned subsidiary of BV (the "Company")(together, BV and Company shall be
referred to hereinafter to "Collexis"), and Stephen A. Leicht, a resident of the
State of North Carolina (the "Executive").

                                    RECITALS

            WHEREAS, BV, Company and Executive entered into that certain
Employment Agreement dated January 25, 2006 (the "Employment Agreement"); and

            WHEREAS, BV, Company and Executive desire to amend and restate the
Employment Agreement in its entirety to read as set forth herein effective as of
the Hire Date (as defined below).

                                    AGREEMENT

            NOW, THEREFORE, in consideration of the premises and the mutual
covenants and promises contained herein, and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereto hereby agree as follows:

      1.    EMPLOYMENT TERMS AND DUTIES

            1.1   EMPLOYMENT. Upon and coincident with the Hire Date, BV agrees
to cause Company to employ and Company hereby employs Executive, and Executive
hereby accepts employment by Company, upon the terms and conditions set forth in
this Agreement.

            1.2   DUTIES.

                  1.2.1  In General. Executive shall serve as Director,
Operations. In such capacity, Executive shall report to and perform such duties
and tasks as are assigned to him by Company's Chief Executive Officer ("CEO") or
his or her designee (the "Services"). During the term of Executive's employment
hereunder, Executive shall devote his full working time and efforts to the
performance of his duties and the furtherance of the interests of Company and
shall not be otherwise employed.

                  1.2.2  Other Activities. Except as is otherwise agreed upon by
Company, Executive shall devote all of Executive's business time, energy and
skill to performing the Services and shall perform the Services diligently,
faithfully and to the best of Executive's abilities. Notwithstanding the above,
Executive may serve as a director or trustee of other organizations, or engage
in charitable, civic, and/or governmental activities provided that such service
and activities do not interfere with Executive's ability to perform his duties

under this Agreement and further provided that Executive obtains written consent
for all such activities from Company, which consent will not be unreasonably
withheld. Executive may engage in personal activities, including, without
limitation, personal investments, provided that such activities do not interfere
with Executive's performance of the Services or any other of Executive's written
agreements with Company.

                  1.2.3  Compliance with Policies. Subject to the terms of this
Agreement, during the Term, Executive shall comply in all material respects with
all Company policies and procedures applicable to employees of Company generally
and Executive specifically.

            1.3   TERM.

                  1.3.1  Hire Date. BV agrees to cause Company to employ and
Company hereby agrees to employ Executive, and Executive hereby accepts
employment with the Company, upon the terms set forth in this Agreement, for the
period commencing upon and coincident with the 1st day of February 2006 (the
"Hire Date") and ending upon the earlier of:

                  1.3.2  Expiration Date. That date which coincides with the
last day of either the Initial Term (as defined below) or the Renewal Term (as
defined below), as the case may be (such date shall be referred to as the
"Expiration Date") (For purposes of this Agreement, the phrase "Initial Term"
shall mean that period from the Hire Date through and including the third (3rd)
anniversary of the Hire Date; and the phrase "Renewal Term" shall mean each
consecutive twelve month period immediately following the Initial Term, during
which period the term of this Agreement shall automatically renew on the same
terms and conditions hereof and without any further act on the part of either
party, provided, however, that in no event shall the term of this Agreement be
renewed hereunder if and to the extent either party delivers to the other
written notice of his or its intent to not renew this Agreement at least one
hundred and eighty (180) days prior to the end of the Initial Term or any
succeeding Renewal Term (as the case may be) (the "Notice of Nonrenewal"); or

                  1.3.3  Termination Date. The Termination Date (as such phrase
is defined in Section 1.5 of this Agreement) (the period from the Hire Date to
the earlier to occur of either the Expiration Date or Termination Date shall be
hereinafter referred to as the "Employment Term").

            1.4   COMPENSATION AND BENEFITS.

                  1.4.1  Base Salary. In consideration of the services rendered
to Company hereunder by Executive and Executive's covenants, BV agrees to cause
Company to pay, which obligation BV agrees to pay should Company fail to do so
in breach of this Agreement, and Company shall, during the Employment Term and
any subsequent employment with Company subsequent to Section 1.4.2, pay
Executive a salary at the annual rate of One Hundred Fifty Thousand Dollars
($150,000) (the "Base Salary"), less statutory deductions and withholdings,
payable in accordance with Company's regular payroll practices.

                                        2

                  1.4.2  Incentive Bonus. During the term of this Agreement,
Executive shall be entitled to an incentive bonus based on and paid in
accordance with the terms and conditions described in Exhibit A entitled
"Executive Incentive Bonus," which exhibit is made a part hereof.

                  1.4.3  Nonqualified Stock Options. In addition to any and all
other compensation described under this Agreement, BV and Executive shall enter
into a Nonqualified Stock Option Agreement, substantially in the form attached
hereto as Exhibit B (the "Option Agreement"). Pursuant to the terms of the
Option Agreement, Executive shall have the right to purchase 100,000 shares of
BV Common Stock (the "Options").

                  1.4.4  Benefits Package. In addition to the Base Salary,
during the Employment Term and any subsequent employment with Company, Executive
shall be eligible to receive such employee benefits and holidays as may be in
effect from time to time as are generally afforded to other executives of
Company.

                  1.4.5  Vacation. Executive shall be entitled to three (3)
weeks paid vacation, in accordance with the vacation accrual schedule set forth
in the Company's Employee Handbook (if any).

                  1.4.6  Expenses. Company shall, upon receipt from Executive of
supporting receipts to the extent required by applicable income tax regulations
and Company's reimbursement policies, reimburse Executive for all out-of-pocket
business expenses reasonably incurred by Executive in connection with his
employment hereunder and consistent with Company policies.

            1.5   TERMINATION.

                  1.5.1  Termination Date. Executive's employment and this
Agreement (except as otherwise provided hereunder) shall terminate upon the
first to occur of any of the following, at the time set forth therefore (the
"Termination Date"):

                  1.5.2  Mutual Termination. At any time by the mutual written
agreement of Company and Executive;

                  1.5.3  Death or Disability. Immediately upon the death of
Executive or a determination by Company that Executive has ceased to be able to
perform the essential functions of his duties, with or without reasonable
accommodation, for a period of not less than ninety (90) days, due to a mental
or physical illness or incapacity ("Disability") (termination pursuant to this
Section 1.5.2 being referred to herein as termination for "Death or
Disability");

                  1.5.4  Voluntary Termination By Executive. Four (4) weeks
following Executive's written notice to Company of termination of employment;
provided, however, that Company may waive all or a portion of such notice period
and accelerate the effective date of such termination (and the Termination Date)
(termination pursuant to this Section 1.5.3 being referred to herein as
"Voluntary" termination);

                                        3

                  1.5.5  Termination For Cause By Company. Immediately following
notice of termination for "Cause" (as defined below), specifying such Cause,
given by Company (termination pursuant to this Section 1.5.4 being referred to
herein as termination for "Cause")(As used herein, "Cause" means (a) termination
based on Executive's being named as a target of or indictment for any crime
constituting a felony in the jurisdiction in which committed, any crime
involving moral turpitude (whether or not a felony), or any other violation of
criminal law involving dishonesty or willful misconduct that materially injures
Company (whether or not a felony); (b) Executive's substance abuse that in any
manner interferes with the performance of his duties; (c) Executive's failure or
refusal to (i) perform his duties at all or in an acceptable manner, (ii) follow
the lawful and proper directives of the Board of Directors or Executive's
supervisor(s) that are within the scope of Executive's duties or (iii) comply in
all material respects with Company's written policies, including, without
limitation, relating to its employment of personnel, handling of confidential
information or trade secrets and trading in its securities; (d) Executive's
breach of this Agreement or any other agreement entered into with Company in
connection with Company's confidential information, trade secrets or other
property; (e) misconduct by Executive that has or could discredit or damage
Company; or (f) Executive's chronic absence from work for reasons other than
illness.);

                  1.5.6  Termination Without Cause By Company. Notwithstanding
any other provisions contained herein, including, but not limited to Section 1.3
above, Company may terminate without Cause (a) this Agreement at any time during
the period, if any, between the Signing Date and Hire Date and (b) Executive's
employment under this Agreement two (2) weeks following its notice of such
termination; provided, however, that during any such period, Company may
suspend, with no reduction in pay or benefits, Executive from his duties as set
forth herein (including, without limitation, Executive's position as a
representative and agent of Company) (termination pursuant to this Section 1.5.5
being referred to herein as termination "Without Cause")

                  1.5.7  Termination For Good Reason by Executive. At the
election of Executive for Good Reason. A "Good Reason" shall occur only if:

            (a)   Either Executive's compensation or benefits as described under
                  this Agreement is reduced, discontinued or otherwise adversely
                  affected;

            (b)   Company fails to perform timely any of its obligations under
                  or otherwise engages in any other act or omission in breach of
                  this Agreement and fails to cure the same within thirty (30)
                  days following written notice thereof; or

            (c)   Failure of any successor to the Company (whether direct or
                  indirect and whether by merger, acquisition, consolidation or
                  otherwise) to assume in a writing delivered to you upon the
                  assignee becoming such, the obligations of the Company
                  hereunder.

                                        4

      Prior to invoking a "Good Reason" termination, Executive must first notify
the Company of the grounds for the "Good Reason" termination and permit the
Company, within ten (10) days after receipt of such notice, an opportunity to
cure.

                  1.5.8  Other Remedies. Termination pursuant to Section 1.5.4
above shall be in addition to and without prejudice to any other right or remedy
to which Company may be entitled at law, in equity, or under this Agreement.

            1.6   SEVERANCE AND TERMINATION.

                  1.6.1  Voluntary Termination, Termination for Cause, or
Termination for Death or Disability. In the case of a termination of Executive's
employment hereunder by mutual agreement, for Death or Disability in accordance
with Section 1.5.2 above, or Executive's Voluntary termination of employment
hereunder in accordance with Section 1.5.3 above, or a termination of
Executive's employment hereunder for Cause in accordance with Section 1.5.4
above, (a) Executive shall not be entitled to receive payment of, and Company
shall have no obligation to pay, any severance or similar compensation
attributable to such termination, other than Base Salary earned but unpaid,
accrued but unused vacation to the extent required by Company's policies, vested
benefits under any employee benefit plan, and any unreimbursed expenses pursuant
to Section 1.4.6 hereof incurred by Executive as of the Termination Date, and
(b) Company's obligations under this Agreement shall immediately cease.

                  1.6.2  Termination Without Cause by Company or For Good Reason
by Executive. Subject to the provisions set forth in this Agreement, in the case
of a termination of Executive's employment hereunder Without Cause in accordance
with Section 1.5.5 or for Good Reason by Executive in accordance with Section
1.5.6, above, BV shall cause Company to pay, which obligation BV agrees to pay
should Company fail to do so in breach of this Agreement, and Company shall
continue to pay Executive's Base Salary for either (a) in the case of where the
effective date of the Termination occurs during the Initial Term or (b) in the
case where the effective date of the Termination occurs during a Renewal Term,
then for a period of one-hundred eighty (180) days following the such date
(hereinafter the "Severance Payments"), payable in installments in accordance
with Company's normal payroll practices and subject to the tax withholding
specified in Section 1.4.1 above. If Executive elects to continue health
coverage under the Consolidated Omnibus Budget Reconciliation Act of 1985
("COBRA"), BV shall cause Company to pay and Company will pay Executive's COBRA
premiums in an amount sufficient to maintain the level of health benefits in
effect on Executive's last day of employment (hereinafter "Benefit
Continuation"), until the earlier of (i) the end of the COBRA coverage period,
(ii) the termination of any period in which Executive receives the Severance
Payments under this Section, or (iii) the date Executive receives comparable
benefits from any other source, whichever occurs first. Nothing contained herein
shall interfere with Executive's right to continue his continuation coverage
under COBRA.

                  1.6.3  Severance Conditioned on Release of Claims. BV and
Company's obligation to provide Executive with the Severance Payment and Benefit

                                        5

Continuation set forth in Section 1.6.2 is contingent upon Executive's execution
of a release of claims reasonably satisfactory to and in favor of Company.

                  1.6.4  Offset Against Severance. During any period in which
Executive is receiving Severance Payments from Company (the "Severance Period"),
such Severance Payments to be provided to Executive shall be reduced on a
dollar-for-dollar basis by any wages or other compensation actually received by
Executive during the Severance Period, regardless of whether such wages or
compensation are from employment, consulting, or other gainful activities.
Executive promises and agrees to promptly advise Company of the amount and
source of any wages or other compensation received by him, from any source,
during the Severance Period and use reasonable efforts to secure substitute
employment or other source of income consistent with Executive's position and
experience.

                  1.6.5  WARN Act Offset. In the event that Executive's
termination Without Cause in accordance with Section 1.5.5 above is covered by
the Worker Adjustment Retraining Notification Act ("WARN") at the time of
Executive's termination, or is deemed to be covered by WARN retrospectively
within 90 days after Executive's termination, the amount of any Severance
Payment or Benefit Continuation Executive is entitled to receive pursuant to
Section 1.6.2 shall be reduced by an amount equal to any payments Company is
required to provide Executive under WARN or by the amount of pay Executive
receives during any portion of WARN's 60-day notice period where Executive does
not perform any work for Company.

      2.    REPRESENTATIONS AND WARRANTIES BY EXECUTIVE

Executive represents and warrants to BV and Company that (a) this Agreement is
valid and binding upon and enforceable against him in accordance with its terms,
(b) Executive is not bound by or subject to any contractual or other obligation
that would be violated by his execution or performance of this Agreement,
including, but not limited to, any non-competition agreement presently in
effect, and (c) Executive is not subject to any pending or, to Executive's
knowledge, threatened claim, action, judgment, order, or investigation that
could adversely affect his ability to perform his obligations under this
Agreement or the business reputation of Company. Executive has not entered into,
and agrees that he will not enter into, any agreement either written or oral in
conflict herewith.

      3.    MISCELLANEOUS

            3.1   NOTICES. All notices, requests, and other communications
hereunder must be in writing and will be deemed to have been duly given only if
delivered personally against written receipt or by facsimile transmission with
answer back confirmation or mailed (postage prepaid by certified or registered
mail, return receipt requested) or by overnight courier to the parties at the
following addresses or facsimile numbers:

                                        6

            If to the Executive, to:

                  Name:        Stephen A Leicht
                  Address:     19200 Captains Watch Road
                               Cornelius, NC 28031

            If to Company, to the Chief Executive Officer and to the SVP of
            Human Resources at the following address:

                  Collexis, Inc.
                  4500 Jackson Blvd.
                  Columbia, SC 29209
                  Attn: President

            With copy to:

                  Collexis, BV
                  P.O. Box 86
                  4190 CB Geldermalsen
                  The Netherlands
                  Attn: CEO

            With copy to:
                  Frank McDaniel, Esq.
                  Thompson Hine LLP
                  One Atlantic Center
                  1201 West Peachtree Street, Suite 2200
                  Atlanta, GA 30309-3449

All such notices, requests and other communications will (a) if delivered
personally to the addresses as provided in this Section be deemed given upon
delivery, (b) if delivered by facsimile transmission to the facsimile number as
provided in this Section be deemed given upon receipt, and (c) if delivered by
mail in the manner described above to the addresses as provided in this Section
be deemed given upon receipt (in each case regardless of whether such notice,
request, or other communication is received by any other person to whom a copy
of such notice, request or other communication is to be delivered pursuant to
this Section). Any party from time to time may change its address, facsimile
number, or other information for the purpose of notices to that party by giving
written notice specifying such change to the other parties hereto.

            3.2   AUTHORIZATION TO BE EMPLOYED. This Agreement, and Executive's
employment hereunder, is subject to Executive providing Company with legally
required proof of Executive's authorization to be employed in the United States
of America.

            3.3   ENTIRE AGREEMENT. This Agreement, together with the Statement
of Terms and Conditions for Employment, which is attached to this Agreement as
Exhibit C and entered into by and between Company and Employee, supersedes any
and all prior discussions

                                        7

and agreements between the parties with respect to the subject matter hereof and
contains the sole and entire agreement between the parties hereto with respect
thereto.

            3.4   SURVIVAL. The respective rights and obligations of the
parties, including but not limited to Sections 1.6.2, 1.6.3, 1.6.4, 1.6.5, 2,
and 3 shall survive the termination of this Agreement, the Employment Term
and/or the Employee's employment with Company.

            3.5   WAIVER. Any term or condition of this Agreement may be waived
at any time by the party that is entitled to the benefit thereof, but no such
waiver shall be effective unless set forth in a written instrument duly executed
by or on behalf of the party waiving such term or condition. No waiver by any
party hereto of any term or condition of this Agreement, in any one or more
instances, shall be deemed to be or construed as a waiver of the same or any
other term or condition of this Agreement on any future occasion. All remedies,
either under this Agreement or by law or otherwise afforded, will be cumulative
and not alternative.

            3.6   AMENDMENT. This Agreement may be amended, supplemented, or
modified only by a written instrument duly executed by or on behalf of each
party hereto.

            3.7   RECOVERY OF ATTORNEY'S FEES. In the event of any litigation
arising from or relating to this Agreement, the prevailing party in such
litigation proceedings shall be entitled to recover, from the non-prevailing
party, the prevailing party's reasonable costs and attorney's fees, in addition
to all other legal or equitable remedies to which it may otherwise be entitled.

            3.8   NO THIRD PARTY BENEFICIARY. The terms and provisions of this
Agreement are intended solely for the benefit of each party hereto and Company's
successors or assigns, and it is not the intention of the parties to confer
third-party beneficiary rights upon any other person.

            3.9   NO ASSIGNMENT; BINDING EFFECT. This Agreement shall inure to
the benefit of any successors or assigns of Company. Executive shall not be
entitled to assign his obligations under this Agreement.

            3.10  HEADINGS. The headings used in this Agreement have been
inserted for convenience of reference only and do not define or limit the
provisions hereof.

            3.11  SEVERABILITY. BV, Company and Executive intend all provisions
of this Agreement to be enforced to the fullest extent permitted by law.
Accordingly, if a court of competent jurisdiction determines that the scope
and/or operation of any provision of this Agreement is too broad to be enforced
as written, Company and Executive intend that the court should reform such
provision to such narrower scope and/or operation as it determines to be
enforceable. If, however, any provision of this Agreement is held to be illegal,
invalid, or unenforceable under present or future law, and not subject to
reformation, then (a) such provision shall be fully severable, (b) this
Agreement shall be construed and enforced as if such provision was never a part
of this Agreement, and (c) the remaining provisions of this Agreement shall
remain in full force and effect and shall not be affected by illegal, invalid,
or unenforceable provisions or by their severance.

                                        8

            3.12  GOVERNING LAW AND JURY TRIAL. THIS AGREEMENT SHALL BE GOVERNED
BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF SOUTH CAROLINA
APPLICABLE TO CONTRACTS EXECUTED AND PERFORMED IN SUCH STATE WITHOUT GIVING
EFFECT TO CONFLICTS OF LAWS PRINCIPLES. BECAUSE DISPUTES ARISING IN CONNECTION
WITH COMMERCIAL MATTERS, INCLUDING EMPLOYMENT AGREEMENTS, ARE MOST QUICKLY AND
ECONOMICALLY RESOLVED BY AN EXPERIENCED AND EXPERT PERSON AND THE PARTIES WISH
APPLICABLE STATE AND FEDERAL LAWS TO APPLY (RATHER THAN ARBITRATION RULES), THE
PARTIES DESIRE THAT THEIR DISPUTES (IF ANY) BE RESOLVED BY A JUDGE APPLYING SUCH
APPLICABLE LAWS. THEREFORE, TO ACHIEVE THE BEST COMBINATION OF THE BENEFITS OF
THE JUDICIAL SYSTEM AND OF ARBITRATION, THE PARTIES HERETO WAIVE ALL RIGHTS TO
TRIAL BY JURY IN ANY ACTION, SUIT, OR PROCEEDING BROUGHT TO RESOLVE ANY DISPUTE,
WHETHER ARISING IN CONTRACT, TORT, OR OTHERWISE BETWEEN THE PARTIES ARISING OUT
OF, CONNECTED WITH, RELATED TO, OR INCIDENTAL TO THE RELATIONSHIP ESTABLISHED
BETWEEN THEM IN CONNECTION WITH THIS EMPLOYMENT AGREEMENT OR MATTERS RELATED
HERETO.

            3.13  JURISDICTION. The parties hereby consent to the personal
jurisdiction and venue of any court physically located within the County of
Richland, South Carolina in connection with any legal or equitable action
between the parties arising out of or in connection with this Agreement.

            3.14  COUNTERPARTS. This Agreement may be executed in any number of
counterparts and by facsimile, each of which will be deemed an original, but all
of which together will constitute one and the same instrument.

            3.15  OPPORTUNITY TO OBTAIN COUNSEL. In connection with the
preparation of this Agreement, Executive acknowledges and agrees that: (a) this
Agreement was prepared by legal counsel to Company (the "Law Firm") solely on
behalf of Company and not on behalf of Executive; (b) Executive has been advised
that his interests may be opposed to the interests of Company and, accordingly,
the Law Firm's representation of Company in the preparation of this Agreement
may not be in the best interests of Executive; and (c) Executive has been
advised to retain separate legal counsel. Executive warrants and agrees that he
has had a reasonable opportunity to obtain independent legal counsel with regard
to the terms and conditions of this Agreement, and has read and fully
understands the terms and conditions of this Agreement. If Executive elects not
to consult with any such counsel, he has done so freely and of his own volition.
By signing this Agreement, Executive is affirming that he has freely and of
Executive's own volition acknowledged and agreed to all terms and conditions
contained in this Agreement.

            3.16  CONSTRUCTION AND INTERPRETATION. Should any provision of this
Agreement require judicial interpretation, the parties hereto agree that the
court interpreting or construing the same shall not apply a presumption that the
terms hereof shall be more strictly construed against one party by reason of the
rule of construction that a document is to be more strictly construed against
the party that itself, or through its agent, prepared the same, and it is

                                        9

expressly agreed and acknowledged that Company, BV and Executive and each of his
and its representatives, legal and otherwise, have participated in the
preparation hereof.

      IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed on the date first set forth above.

                                      COMPANY

                                      COLLEXIS, INC., A DELAWARE CORPORATION

                                      Signature:/s/WILLIAM KIRKLAND
                                                --------------------------------
                                      Printed Name: William Kirkland
                                      Title: President & Chief Executive Officer

                                      BV, AS A PARTY AND GUARANTOR TO COLLEXIS'
                                      OBLIGATIONS UNDER THIS AGREEMENT

                                      COLLEXIS BV, A NETHERLANDS CORPORATION

                                      Signature:/s/PETER VAN PRAAG
                                                ---------------------
                                      Printed Name: Peter van Praag
                                      Title: Chief Executive Officer

                                      EXECUTIVE

                                      STEPHEN LEICHT

                                      Signature:/s/STEPHEN LEICHT
                                                --------------------------------
                                      Printed Name: Stephen Leicht
                                                    ----------------------------
                                      Title: Director, Operations

                                       10

                                    EXHIBIT A

                            EXECUTIVE INCENTIVE BONUS

                                    ATTACHED

                                       11

                                    EXHIBIT B

                             STOCK OPTION AGREEMENT

                                    ATTACHED

                                       12

                                    EXHIBIT C

            STATEMENT OF STANDARD TERMS AND CONDITIONS FOR EMPLOYMENT

                                    ATTACHED

                                       13

                        AMENDMENT TO EMPLOYMENT AGREEMENT

      THIS FIRST AMENDMENT TO THE EMPLOYMENT AGREEMENT (the "Amendment"), is
entered into as of the 12th day of February, 2007, by and among Collexis, BV, a
Netherlands company ("BV"), Collexis, Inc., a Delaware corporation (the
"Company"), and Stephen A. Leicht ("Executive"). Except as otherwise provided in
this Amendment, all capitalized terms and phrases used in this Amendment shall
have the meaning ascribed thereto in the Employment Agreement.

                               W I T N E S S T H :

      WHEREAS, BV, Company and Executive entered into that certain Employment
Agreement, dated January 25, 2006 (the "Employment Agreement"), which provides
for the employment of Executive by Company as Director, Operations of BV; and

      WHEREAS, the parties desire to amend the Employment Agreement as provided
herein.

      NOW, THEREFORE, in consideration of the premises and the mutual covenants
contained herein, the parties agree as follows:

      1.    Section 1.42 Incentive Bonus. Section 1.42 of the Employment
Agreement shall be deleted in its entirety, with no further force and effect
hereafter, and replaced with the following:

            "Section 1.42 Performance Based Cash Bonus. In addition to any other
      compensation paid to Executive under this Agreement, Executive's right to
      receive and BV's obligation to pay an incentive bonus shall be subject to
      Executive's satisfaction of performance criteria as determined by BV's
      Board of Directors in its sole and absolute discretion."

      2.    Each of the parties to this Amendment acknowledge and agree that,
except as modified hereby, all of the terms and provisions of the Employment
Agreement shall remain in full force and effect.

      3.    This Amendment is the sole agreement between the parties as to the
amendment and modification of the Employment Agreement as described herein.

      4.    This Amendment may be executed in any number of counterparts, each
of which shall be deemed to be an original as against any party whose signature
appears thereon, and all of which shall together constitute one and the same
instrument. Invalidation of any one or more of the provisions of this Amendment
shall in no way affect any of the other provisions of this Amendment, which
shall remain in full force and effect.

      5.    This Amendment shall be binding upon and shall inure to the benefit
of the parties hereto and their respective heirs, executors, successors,
personal representatives and assigns.

      6.    This Amendment shall be governed by and construed in accordance with
the laws of the State of South Carolina.

      IN WITNESS WHEREOF, the parties have executed this Amendment as of the
date first above written.

                                              COLLEXIS BV

                                              By:/s/PETER VAN PRAAG
                                                 -------------------------
                                              Name: Peter van Praag
                                              Title: CEO

                                              COLLEXIS, INC.

                                              By:/s/WILLIAM KIRKLAND
                                                 -------------------------
                                              Name: William Kirkland
                                              Title: President

                                              STEPHEN A. LEICHT

                                              By:/s/STEPHEN A. LEICHT
                                                 -------------------------
                                              Name: Stephen A. Leicht
                                              Title: Vice President SalesCOLLEXIS OPTION
                                    AGREEMENT

      THIS NONQUALIFIED STOCK OPTION AGREEMENT is effective as of the first day
of __________, by and between:

        COLLEXIS B.V., a Dutch company (the 'Company') and;

      Name, DOB, City and State of birth, United States of America, residing at
(the 'Optionee') (together, this agreement and the Statement of Terms and
Conditions and Schedules attached hereto shall constitute and be referred to as
the 'Agreement').

                              W I T N E S S E T H:

      WHEREAS, Company is the parent company of Collexis, Inc., a Delaware
corporation ('Collexis'), which has agreed to employ Optionee under the terms
and conditions of that certain Employment Agreement having a signing date as of
the 25th day of January 2006 (the 'Employment Agreement'), with a Hire Date of
______, 2006;

      WHEREAS, pursuant to the arrangements made under Employment Agreement,
Company agreed to issue to Optionee the option on the acquisition of
______ordinary shares in the share capital of Company, for the purpose of
providing a sense of proprietorship and personal involvement in the development
and financial success of and further encouraging Optionee to devote his best
efforts to Company and Collexis;

      WHEREAS, the issuance of any share, including, without limitation, Option
Shares, in the share capital of Company and related corporate law matters are
subject to Company's Articles of Association, as amended, and the laws of the
Netherlands, and are therewith subject and conditional on approval and adoption
by the meeting of Shareholders of Company of the relevant resolution. In the
meeting of Shareholders of Company of 3 October 2006, the Shareholders have
approved and adopted the issuance of the nonqualified stock option (the
'Option') to acquire the Option Shares on the terms and conditions described in
this Agreement;

      WHEREAS, by way of clarification of the foregoing, although it is being
signed by the parties and approved by the Shareholders as of the
above-referenced Shareholders meeting, this Agreement is being made effective as
of the Grant Date since the offer and acceptance of Optionee's employment, which
offer included the Options, along with the terms represented herein, was
effective as of such date;

      NOW, THEREFORE, in consideration of the premises and of the mutual
covenants and agreements hereinafter set forth, Company hereby awards to
Optionee as of the Grant Date the Option to acquire the Option Shares on the
terms and conditions described in this Agreement, which Optionee hereby accepts
on said terms and conditions,

      1.  GRANT DATE: ________.

      2.  TYPE OF OPTION: Nonqualified stock option.

      3.  OPTION SHARES: ______ ordinary shares in the share capital of Company,
          with a nominal value on Grant Date of EUR 0,05 (the 'Option Shares'),
          as defined in Company's Articles of Association, as amended, subject
          to adjustment as provided in the attached Statement of Terms and
          Conditions. Any and all shares in the share capital of Company will
          hereinafter also be called: the 'Stock.'

      4.  EXERCISE PRICE: $____ US per ordinary share in the share capital of
          Company (the 'Exercise Price'), subject to adjustment as provided in
          the attached Statement of Terms and Conditions, which is (made) an
          integral part of this Agreement.

      5.  OPTION PERIOD: The Option may be exercised as to all or any portion of
          the Option Shares during the period that commences on the Grant Date,
          and ends on the earlier of:

            a.  The third (3rd) anniversary of the Grant Date; or

            b.  In the event of any termination of Optionee's services under the
                Employment Agreement, then in such event, upon and coincident
                with the earlier to occur of the first anniversary of either the
                Expiration Date or Termination Date (as such phrases are defined
                in the Employment Agreement)(the 'Option Period');

          provided, however, that the Option may be exercised on any date during
          such Option Period as to no more than the number of Option Shares that
          have vested as of such date as determined in accordance with Section
          6, below. Company, in its sole discretion, may determine that Optionee
          is disabled upon certification thereof by a qualified physician
          selected by it after such physician examines the Optionee.

      6.  VESTING SCHEDULE: The Option Shares shall vest in accordance with the
          Vesting Schedule or as otherwise stated in Schedule 1, entitled
          'Vesting Schedule,' which is attached hereto and made a part hereof.
          All or a portion of the Option Shares may vest on an earlier date as
          and if so provided in the attached Statement of Terms and Conditions.

      7.  CONVERSION: In case of any consolidation with or merger of the Company

          with or into another corporation (other than a merger or consolidation
          in which the Company is the surviving or continuing corporation), or
          in case of any sale, lease, or conveyance to another corporation of
          the property and assets of any nature of the Company as an entirety or
          substantially as an entirety or the conveyance by shareholders of the
          Company to another corporation of at least eighty percent (80%) of the
          ordinary shares of the share capital of the Company (such actions
          being hereinafter collectively referred to as 'Reorganizations'),
          there shall thereafter be deliverable upon exercise of this Option (in
          lieu of the number of ordinary shares theretofore deliverable) the
          kind and amount of shares of stock or other securities or property
          receivable upon such Reorganization by a holder of the number of
          ordinary

                                        2

          shares for which this Option might have been exercised immediately
          prior to such Reorganization. In case of any Reorganization,
          appropriate adjustment, as determined in good faith by the Board of
          Directors of the Company, shall be made in the application of the
          provisions herein set forth with respect to the rights and interests
          of the Optionee so that the provisions set forth herein shall
          thereafter be applicable, as nearly as possible, in relation to any
          shares or other property thereafter deliverable upon exercise of this
          Option. Any such adjustment shall be made by and set forth in a
          supplemental agreement between the Company, or any successor thereto,
          and the Optionee and shall for all purposes hereof conclusively be
          deemed to be an appropriate adjustment. The Company shall use
          reasonable efforts to attempt to assure that it shall not effect any
          such Reorganization unless upon or prior to the consummation thereof
          the successor corporation, or if the Company shall be the surviving
          corporation in any such Reorganization and is not the issuer of the
          shares of stock or other securities or property to be delivered to
          holders of ordinary shares of the Company outstanding at the effective
          time thereof, then such issuer, shall assume by written instrument the
          obligation to deliver to the Optionee such shares of stock,
          securities, cash or other property as the Optionee shall be entitled
          to purchase in accordance with the foregoing provisions.

          The above provision shall similarly apply to successive
          reclassifications and changes of ordinary shares and to successive
          Reorganizations, consolidations, mergers, sales, leases, or
          conveyances.

      8.  NON-ENCUMBRANCE: Optionee hereby undertakes that it will not create or
          permit to exist any right of mortgage, pledge, usufruct or other
          security interest or restriction whatsoever and any arrest, charge,
          attachment, option or lien or any similar concept that limits free and
          unrestricted title and/or use, under any applicable jurisdiction (the
          'Encumbrance') over all or any part of the Option nor assign or
          otherwise purport to deal with the beneficial interest therein or any
          other right relating thereto separate from the legal ownership of such
          Option.

          Optionee and Company acknowledge that other limitations, restrictions,
          terms and conditions applicable to Agreement, the Option and Option
          Shares as (elsewhere) described in this Agreement, Company's Articles
          of Association (as amended), as well as the attached Statement of
          Terms and Conditions apply.

      9.  TAXES: Optionee warrants that any and all taxes, and/or social
          security premiums and/or penalties that may become due in connection
          with this Agreement, if any, shall be for the account of the Optionee.
          Optionee herewith declares to indemnify Company and Collexis against
          any such liabilities. In the event the Company and/or Collexis,
          directly or indirectly, is considered by the relevant tax and/or
          social security authorities to have a duty to withhold or pay any
          taxes, premiums and/or penalties in connection with the Agreement,
          Collexis shall be entitled to full and forthwith reimbursements by the
          Optionee for any such taxes, premiums and/or penalties it is held
          liable for.

      10. MISCELLANEOUS: Except as otherwise defined in this Agreement,
          capitalized terms and phrases shall have the meaning ascribed thereto
          in the Employment Agreement (as

                                        3

          defined below). This Agreement, including, without limitation, the
          Option described herein, is subject to cancellation if this Agreement
          is not signed by Optionee as required below.

      11. CHOICE OF LAW, CHOICE OF FORUM: This Agreement is governed by the laws
          of the Netherlands, except for mandatory laws on a case to case basis.
          All disputes arising out of or in connection with this Agreement
          and/or related matters, which cannot be solved through amicable
          negotiations shall be exclusively and finally settled under the Rules
          of Arbitration of the International Chamber of Commerce (ICC), which
          Rules are available at its web site:
          www.iccwbo.org/court/english/rules/rules.asp. The Arbitral Tribunal
          shall be composed of one arbitrator appointed in accordance with said
          Rules. The place of arbitration shall be (i) in Amsterdam, the
          Netherlands if the Optionee is residing outside the United States of
          America, or (ii) in Columbia, South Carolina, United States of America
          if the Optionee is residing inside the United States of America, and
          the arbitration proceedings shall be conducted in English, without
          prejudice to the right of either Party to apply for disposition by
          summary proceedings.

      IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date first written above.

                                        COLLEXIS B.V.

                                        By: ______________________________
                                        Name: Peter van Praag
                                        Title: Chief Executive Officer

      By signing below, Optionee hereby accepts the Option subject to all its
terms and provisions and agrees to be bound by the terms and provisions of this
Agreement, including, without limitation, the attached Statement of Terms and
Conditions. Optionee authorizes Company to withhold, in accordance with
applicable law, from any compensation payable to him or her, any taxes required
to be withheld by federal, state or local law as a result of the grant,
existence or exercise of the Option or subsequent sale of the Option Shares, if
any.

                                        OPTIONEE

                                        Signature: _______________________
                                        Name:

                                        4

                                  COLLEXIS B.V.

                                    STATEMENT
                                       OF
                              TERMS AND CONDITIONS
                                     TO THE
                       NONQUALIFIED STOCK OPTION AGREEMENT

1.    Exercise of Option. The Option may be exercised with respect to all or any
portion of the Option Shares that have vested in accordance with Section 6 of
this Agreement at any time during the Option Period by:

      a.    Delivery to Company, at its principal place of business, of a
            written notice of exercise in substantially the form attached hereto
            as Exhibit 1, which shall be delivered to Company no earlier than
            thirty (30) days and no later than ten (10) days prior to the date
            upon which Optionee desires to exercise all or any portion of the
            Option, unless Company shall otherwise agree; and

      b.    Payment to Company of the Exercise Price multiplied by the number of
            Option Shares being acquired (the 'Issuance Price').

Optionee and Company acknowledge that any issuance of any Option Shares and
other Stock are subject to Company's Articles of Association, as amended, and
the laws of the Netherlands. Prior to signing of the Agreement, Company will
procure to put the relevant issuance of the Option to acquire the Option Shares
on the terms and conditions described in the Agreement, on the agenda of the
first, subsequent meeting of Shareholders of Company, for resolution as required
under the laws of the Netherlands and Company's Articles of Association.
Thereafter, after signing of the Agreement, upon acceptance of the
afore-mentioned notice by Optionee and receipt of payment in full of the
Issuance Price by Company, and after issuance of the relevant Option Shares,
Company will procure that Optionee will receive a certified copy of the notarial
deed of issuance thereof as soon as reasonably possible.

2.    Issuance Price. Payment of the Issuance Price for all Option Shares
pursuant to the exercise of an Option shall be made in cash, or other monetary
value that Company on a case to case basis finds and confirms to be acceptable
in writing.

3.    No Rights as a Shareholder. Optionee shall not be deemed to be the holder
of, or to have any of the rights of a holder with respect to any Option Shares
until (a) the Option shall have been exercised pursuant to the terms of this
Agreement and Optionee shall have paid in full the Issuance Price for the number
of Option Shares in respect of which the Option was exercised, (b) Company shall
have issued and delivered the Option Shares to Optionee, and (c) Optionee's name
shall have been entered as a shareholder of record on the books of Company,
whereupon Optionee shall have full ownership rights with respect to such Option
Shares. Company shall make no adjustment for any dividends or distributions or
other rights on or with respect to Option Shares for which the

                                        1

record date is prior to the issuance of such stock certificate, except as may
otherwise be provided in this Agreement.

4.    Restriction on Transfer of Option. The Option evidenced hereby is
nontransferable other than by will or the laws of descent and distribution and
shall be exercisable during the lifetime of Optionee only by Optionee (or in the
event of his disability, by his personal representative) and after his death,
only by his legatee or the executor of his estate.

5.    Securities Laws Restrictions. The Option may not be exercised at any time
unless, in the opinion of counsel for Company, the issuance and sale of the
Option Shares issued upon such exercise is exempt from registration under the
Securities Act of 1933, as amended, or any other applicable federal or state
securities law, rule or regulation, or the Option Shares have been duly
registered under such laws. Company shall not be required to register the Option
Shares issuable upon the exercise of the Option under any such laws.

6.    Repurchase of Option Shares After Violation of Agreement Regarding Certain
Activities. If Optionee violates any confidentiality or other agreement or
obligation in favor of Company applicable to Optionee's activities after
Optionee ceases (whether voluntarily or otherwise) to perform services for
Company, then Company shall have the right in its sole discretion to purchase
all or any portion of the Option Shares acquired by Optionee's exercise of the
Option by giving notice to Optionee no later than sixty (60) days after the date
Company obtains knowledge of Optionee's violation of the confidentiality or
other agreement or other obligation. The price at which Company may repurchase
each Option Share shall equal the Exercise Price. Optionee shall deliver the
Option Shares, duly endorsed for transfer to Company, free and clear of all
liens, security interests, pledges or other claims or charges, and Company will
tender to Optionee, by bank wire transfer, cash or cheque, the purchase price
equal to the total Issuance Price paid for such Option Shares.

7.    First Right of Refusal.

      a.    In General. The provisions of this Section 7 shall be effective
            unless and until the Option Shares are listed on a national
            securities exchange or quoted on the National Association of
            Securities Dealers Automated Quotation System. The provisions of
            this Section shall be binding upon any transferee (whether by
            purchase, gift, devise, intestate succession, or other transfer) of
            any Option Shares purchased pursuant to the exercise of this Option.
            Company shall have complete discretion regarding whether or not
            Option Shares will be purchased by Company pursuant to this Section.
            All terms and conditions of the right of first refusal and
            repurchase right that are not expressly set forth herein shall be
            determined in the sole discretion of Company.

      b.    Repurchase Right. At any time within ninety (90) days after the
            termination of Optionee's Employment Agreement (or, if later, within
            the ninety (90) day period beginning immediately after the exercise
            of the Option), Company shall have the right to repurchase for cash
            or, if applicable, cancellation of purchase money indebtedness from
            Optionee any Option Shares acquired by Optionee pursuant to the
            exercise of the Option at the Exercise Price of such Shares, if
            Optionee's

                                        2

            services under the Employment Agreement are terminated by Company
            for Cause.

8.    Changes in Capitalization.

      a.    An appropriate adjustment in the number and kind of Option Shares
            and in the Exercise Price shall be made by Company, in its sole
            discretion, in the event the number of Shares of Stock of Company is
            increased or decreased by reason of Company effecting one or more
            stock dividends, stock splits, reverse stock splits, subdivisions,
            consolidations or other similar events, or there occurs any other
            event which in the judgment of Company necessitates such action.

      b.    In the event of a Change in Control pursuant to which the surviving
            entity does not agree to the assumption of the Option, Company may
            elect to take such action as it deems necessary or appropriate,
            including, without limitation, substitute new awards, adjust
            outstanding awards, accelerate awards or remove restrictions on
            outstanding awards. For purposes of this subsection, the phrase
            'Change In Control' means: (a) the acquisition of ownership,
            directly or indirectly (in a single transaction or a series of
            related transactions), beneficially or of record, by any Person or
            group (within the meaning of Section 13(d) and Section 14(d)(2) of
            the Securities Exchange Act of 1934 as in effect on the date hereof)
            of capital stock representing more than 50.1% of the issued and
            outstanding capital stock of Company entitled to vote for the
            members of the board of directors of Company (other than by any
            Person or group in control of Company on the date hereof), or (b)
            the acquisition of ownership, directly or indirectly (in a single
            transaction or a sales of related transactions), by any Person or
            group (other than the group in control of Company on the date
            hereof) of over 50.1% of the assets of Company; provided, however,
            that a Change in Control shall not include any acquisitions
            described in (a) or (b) above by any holder of Company's common
            stock, group of such stockholders or their respective affiliates or
            any change in control that occurs on account of any public offering
            of Company's common stock registered under the Securities Exchange
            Act of 1934. 'Person' shall mean a natural person, partnership
            (whether general, limited, or limited liability, and whether
            domestic or foreign), limited liability company, trust, business
            trust, estate, association, corporation, joint venture, custodian,
            nominee, cooperative, or any other organization or any other
            individual or entity in its own or any representative capacity.

      c.    The existence of the Option granted pursuant to this Agreement shall
            not affect in any way the right or power of Company to make or
            authorize any adjustment, reclassification, reorganization or other
            change in its capital or business structure, any merger or
            consolidation of Company, any issue of debt or equity securities
            having preferences or priorities as to its Stock or the rights
            thereof, the dissolution or liquidation of Company, any sale or
            transfer of all or any part of its business or assets, or any other
            corporate act or proceeding. Any adjustment pursuant to this Section
            may provide, in Company's discretion, for the elimination without

                                        3

            payment therefor of any fractional shares that might otherwise
            become subject to any Option.

9.    Governing Laws, choice of forum. This Agreement shall be construed,
administered and enforced according to the laws of the Netherlands, except for
mandatory laws on a case to case basis. All disputes arising out of or in
connection with this Agreement and/or related matters, which cannot be solved
through amicable negotiations shall be exclusively and finally settled under the
Rules of Arbitration of the International Chamber of Commerce (ICC), which Rules
are available at its web site: www.iccwbo.org/court/english/rules/rules.asp. The
Arbitral Tribunal shall be composed of one arbitrator appointed in accordance
with said Rules. The place of arbitration shall be (i) in Amsterdam, the
Netherlands if the Optionee is residing outside the United States of America, or
(ii) in Columbia, South Carolina, United States of America if the Optionee is
residing inside the United States of America, and the arbitration proceedings
shall be conducted in English, without prejudice to the right of either Party to
apply for disposition by summary proceedings.

10.   Successors. This Agreement shall be binding upon and inure to the benefit
of the heirs, legal representatives, successors and permitted assigns of
Optionee and Company.

11.   Notice. Except as otherwise specified herein, all notices and other
communications under this Agreement shall be in writing and shall be deemed to
have been given if personally delivered or if sent to the proposed recipient at
the proposed recipient's last known address (a) by registered or certified
United States mail, return receipt requested, postage prepaid, or (b) by a
nationally recognized overnight courier service. Any party may designate any
other address to which notices shall be sent by giving notice of the address to
the other party in the same manner as provided herein.

12.   Severability. In the event that any one or more of the provisions or
portion thereof contained in this Agreement shall for any reason be held to be
invalid, illegal or unenforceable in any respect, the same shall not invalidate
or otherwise affect any other provisions of this Agreement, and this Agreement
shall be construed as if the invalid, illegal or unenforceable provision or
portion thereof had never been contained herein.

13.   Other Terms; Entire Agreement. Optionee's rights under this Agreement are
subject in all respects to all of the terms and conditions of the form of
exercise notice attached as Exhibit 1. Each of the terms and conditions
contained in Exhibit 1 are incorporated herein by reference. This Agreement
expresses the entire understanding of the parties with respect to the Option.

14.   Violation. Any transfer, pledge, sale, assignment, or hypothecation of the
Option or any portion thereof shall be a violation of the terms of this
Agreement and shall be void and without effect.

15.   Headings and Capitalized Terms. Section headings used in this Agreement
are for convenience of reference only and shall not be considered in construing
this Agreement.

16.   Specific Performance. In the event of any actual or threatened default in,
or breach of, any of the terms, conditions and provisions of this Agreement, the
party or parties who are

                                        4

thereby aggrieved shall have the right to specific performance and injunction in
addition to any and all other rights and remedies at law or in equity, and all
such rights and remedies shall be cumulative.

17.   No Right to Continued Retention. Nothing in this Agreement shall be
interpreted or construed to confer upon Optionee any right with respect to
continued service of employment with Company or Collexis, as the case may be,
nor shall this Agreement interfere in any way with the right of the Board of
Directors or shareholders, acting pursuant to its Bylaws and/or articles of
association of either Company or Collexis, as the case may be, to terminate
Optionee's service of employment at any time.

              [REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK]

                                        5

                                    EXHIBIT 1

                                 COLLEXIS, B.V.

                              NOTICE OF EXERCISE OF
                                OPTION TO ACQUIRE
                                  COMMON STOCK

                                        Name:
                                        Address: _____________________________
                                                 _____________________________
                                                 _____________________________

                                        Date:    _____________________________

Collexis B.V.

[______________]
[______________]
Attn: CEO

Re:   Exercise of Nonqualified Stock Option

To whom it may concern:

      I hereby elect to exercise the option granted to me to acquire ________
Option Shares in accordance with that certain Nonqualified Stock Option
Agreement (the 'Agreement') dated as of February 1, 2006. Except as otherwise
defined in this notice, all capitalized terms and phrases in this notice shall
have the meaning ascribed thereto in the Agreement. Subject to Company's
acceptance, the issuance proceedings will commence as of the _______ day of
__________________ 200____ (the 'Exercise Date').

      On the Exercise Date, I will deliver to you cash, or by bank wire to
Company, in the total amount of $________, representing the full Issuance Price
of such Option Shares. If I do not pay the full Issuance Price by cash or bank
wire to Company on the Exercise Date, I hereby request that Company withhold the
number of Option Shares that have an aggregate value equal to the Issuance Price
of the number of Option Shares for which this notice is given from the number of
Option Shares issued to me.

      As soon as the relevant, certified copy of the notarial deed of issuance
is available, please deliver it to me at the above address.

      If the Option Shares being acquired are not registered for issuance to and
resale by Optionee pursuant to an effective registration statement on Form S-8
(or successor form) filed

                                        1

under the Securities Act of 1933, as amended (the '1933 Act'), I hereby
represent, warrant, covenant, and agree with Company as follows:

  1.  The Option Shares being acquired by me are being acquired for my own
      account without the participation of any other person, with the intent of
      holding the Option Shares for investment and without the intent of
      participating, directly or indirectly, in a distribution of the Option
      Shares, and not with a view to, or for resale in connection with, any
      distribution of the Option Shares, nor am I aware of the existence of any
      distribution of the Option Shares;

  2.  I am not acquiring the Option Shares based upon any representation, oral
      or written, by any person with respect to the future value of, or income
      from, the Option Shares but rather upon an independent examination and
      judgment as to the prospects of Company;

  3.  The Option Shares were not offered to me by means of publicly disseminated
      advertisements or sales literature, nor am I aware of any offers made to
      other persons by such means;

  4.  I am able to bear the economic risks of the investment in the Option
      Shares, including the risk of a complete loss of my investment therein;

  5.  I understand and agree that the Option Shares will be issued and sold to
      me without registration under any state law relating to the registration
      of securities for sale, and will be issued and sold in reliance on the
      exemptions from registration under the 1933 Act and the rules and
      regulations promulgated thereunder;

  6.  The Option Shares cannot be offered for sale, sold or transferred by me
      other than pursuant to: (1) an effective registration under the 1933 Act
      or in a transaction otherwise in compliance with the 1933 Act; (2)
      evidence satisfactory to Company of compliance with the applicable
      securities laws of other jurisdictions; and (3) compliance with the
      provisions in the Agreement granting Company a right of first refusal and
      other repurchase rights with respect to the Option Shares. Company shall
      be entitled to rely upon an opinion of counsel satisfactory to it with
      respect to compliance with the above laws;

  7.  Company will be under no obligation to register the Option Shares or to
      comply with any exemption available for the sale of the Option Shares
      without registration or filing, and no assurance has been given that the
      information or conditions necessary to permit routine sales of securities
      of Company under Rule 144 under the 1933 Act are or will become available.
      Company is under no obligation to act in any manner so as to make Rule 144
      available with respect to the Option Shares;

  8.  I agree, in connection with any public offering of Company's Stock, upon
      request of Company or the underwriters managing any underwritten public
      offering of Company's Stock and making such request with the approval of
      Company's Board of Directors, not to sell, make any short sale of, loan,
      grant any option for the purchase of, or otherwise

                                        2

      dispose of any of my Option Shares without the prior written consent of
      Company or such underwriters, as the case may be, from the effective date
      of such registration for so long as Company or the underwriters may
      specify, but in any event not to exceed 180 days;

  9.  I have had the opportunity to ask questions of and receive answers from
      Company and any person acting on its behalf and to obtain all material
      information reasonably available with respect to Company and its affairs.
      I have received all information and data with respect to Company which I
      have requested and which I have deemed relevant in connection with the
      evaluation of the merits and risks of my investment in Company;

  10. I have such knowledge and experience in financial and business matters
      that I am capable of evaluating the merits and risks of the purchase of
      the Option Shares hereunder and I am able to bear the economic risk of
      such purchase; and

  11. I understand and agree that the Option Shares being acquired by me are
      subject to certain restrictions contained in the Agreement, including,
      without limitation, Company's right to repurchase the Option Shares upon
      the occurrence of certain events and Company's right of first refusal with
      respect to the Option Shares.

      The agreements, representations, warranties and covenants made by me
herein extend to and apply to all of the Option Shares of Company issued to me
pursuant to this notice. Acceptance by me of the certificate representing such
Option Shares shall constitute a confirmation by me that all such agreements,
representations, warranties and covenants made herein shall be true and correct
at that time.

                                        Very truly yours,

                                        __________________________________

AGREED TO AND ACCEPTED:
COLLEXIS B.V.

By:________________________________

Title:_____________________________

Cumulative Number of Option Shares
Exercised to Date:_________________

Number of Unexercised Option Shares
Remaining:_________________________     Date:_____________________________

                                        3

                                   SCHEDULE 1

                                  COLLEXIS B.V.

                       NONQUALIFIED STOCK OPTION AGREEMENT

                                Vesting Schedule

      Aggregate Number of Option        Date (close of business) on which such
      Shares which become Vested        aggregate Option Shares become Vested
      --------------------------        --------------------------------------

      (a)

      (b)

      (c)

      (d)

      (e)

      (f)

      (g)

      (h)

      (i)

      (j)

      (k)

      (l)

Notwithstanding the foregoing, no Option Shares shall vest upon or following the
effective date of Optionee's termination service of employment if such
termination shall occur (a) on account of mutual agreement; (b) Optionee's death
or disability; (c) for Cause; or (d) on account of a voluntary termination by
Optionee; provided, however, that all such Option Shares shall become fully and
immediately vested upon and coincident with the effective date on which any one
of the following events shall first occur: (y) a Change in Control; or (z) as
defined in Optionee's employment agreement, the termination of Optionee's
service of employment by Optionee for Good Reason or by Company without cause.

                                        4

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