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                                                                    EXHIBIT 10.8

                       RESEARCH AND DEVELOPMENT AGREEMENT

         This Research and Development Agreement ("Agreement"), effective as of
March 10, 2000 ("Effective Date"), is between CytoGenix, Inc., a Nevada
corporation ("CytoGenix"), and Argyll Scientific, L.L.C., a Texas limited
liability company ("Argyll").

         WHEREAS, CytoGenix has developed and owns proprietary technology
relating to a molecular biological cloning vector capable of being inserted into
a biological cell and causing the replication of a specific single strand of DNA
or ODNs (as defined below) ("CytoGenix Proprietary Technology");

         WHEREAS, Argyll has developed and owns proprietary technology relating
to non-alcoholic mouthwash and a non-alcoholic delivery system for orally
ingestable active ingredients (the "Argyll Proprietary Technology");

         WHEREAS, the parties are desirous of entering into a research and
development program (the "Program") in which work will be done by CytoGenix with
the objective of developing up to five (5) Commercial Formulations (as defined
below) using a combination of the CytoGenix Proprietary Technology and the
Argyll Proprietary Technology and, if such research and development results in
the successful development of one or more Commercial Formulations, to enter into
a joint venture to commercially exploit such Commercial Formulation(s).

         NOW, THEREFORE, in consideration of the mutual covenants herein set
forth, the parties hereto agree as follows:

                             ARTICLE I: DEFINITIONS

         For purposes of this Agreement, the following terms shall have the
following meanings:

         1.1  "Formulation" means a formulation, composition of matter, or
ingredient or dosage form utilizing the CytoGenix Proprietary Technology and the
Argyll Proprietary Technology and proprietary technology which may be obtained
from third parties for the introduction of a molecular biological cloning vector
into human blood cells for the purpose of preventing or correcting a genetic
deficiency that causes a particular disease.

         1.2  "Commercial Formulation" means a Formulation that, when made in
dosage form, is a commercially viable prescription drug product.

         1.3  Oligodeoxynucleotide ("ODN") means specific sequences of the
nucleotides Adenine, Cytosine, Guanine, Thymine or Uracil.

         1.4  "Fair Market Value" means (a) as to any securities which are
listed or admitted to trading on any national securities exchange on any
trading day, the amount equal to (i) the last sale price of such securities,
regular way, on such date or, if no such sale takes place on such date, the
average of the closing bid and asked prices thereof on such date, in each
case as officially reported on the principal national securities exchange on
which such securities are then listed or admitted to

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trading, or (ii) if such securities are not then listed or admitted to
trading on any national securities exchange but are reported through the
automated quotation system of a registered securities association, the last
trading price of such securities on such date, or if there shall have been no
trading on such date, the average of the closing bid and asked prices of such
securities on such date as shown by such automated quotation system, and (b)
as to any other property on any date, the fair market value of such property
on such date as determined in good faith by the parties, PROVIDED that if
either party so requests in writing, the fair market value of such property
shall be determined by an independent, recognized investment banking firm, an
independent, nationally recognized accounting firm or an independent,
recognized appraisal firm selected by the parties.

                             ARTICLE II: THE PROGRAM

         2.1  SCOPE. The Program shall consist of research and development
conducted by CytoGenix, subject to the terms and conditions of this Agreement,
with respect to the development and production of up to five (5) Commercial
Formulations.

         2.2  DURATION. The Program shall remain in effect for a period from the
Effective Date to the fifth anniversary of the Effective Date, (the "Initial
Term"), subject to renewal for additional periods by agreement of the parties
(each a "Renewal Term"), unless earlier terminated in accordance with the terms
of this Agreement.

         2.3  FUNDING. CytoGenix will provide funds as it deems necessary to
support the Program for its duration.

         2.4  MANAGEMENT OF RESEARCH. CytoGenix shall be responsible for the
direct management and supervision of the research and development conducted in
the Program.

         2.5  PARTIES TO MAKE TECHNOLOGY AVAILABLE. To the extent that they now
or hereafter have the legal right to do so, CytoGenix and Argyll hereby agree
that, for the duration of the Program, each will make available for purposes of
the Program such technology (including proprietary technology) relating to
Formulations as may be reasonably necessary to carry out the Program but for no
other purpose.

         2.6  EARLY TERMINATION OF PROGRAM (a) Each party shall have the right
to terminate the Program at any time during the first twelve months after the
Effective Date upon ninety (90) days prior written notice to the other party.
After such twelve-month period, each party shall have the right to terminate the
Program in the event of a breach by the other party of a material obligation
hereunder by delivering ninety (90) days' prior written notice to the other
party, setting forth the cause and specifying the date of termination.

              (b) The Program may also be terminated by the parties in writing
as provided in Section 3.2(a).

         2.7  EFFECT OF TERMINATION OF PROGRAM. The termination of the Program
or the expiration of the Initial Term or any Renewal Term without renewal
shall not terminate or otherwise affect the obligations of the parties under
the other Articles of this Agreement; provided, that if no Determination of
Success (as defined below) has been made on or before the expiration

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of the Evaluation Period (as defined below), the obligations of the parties
under Article IV and Article V shall terminate.

                      ARTICLE III: REPORTING OTHER MATTERS

         3.1  RECORDS AND REPORTS. For the duration of the Program, CytoGenix
will prepare and maintain records in accordance with its customary practices
relating to the progress and status of the Program. Such records shall be made
available at all reasonable times for inspection and review by Argyll and/or its
designees. Upon request of Argyll and upon the expiration or termination of the
Program, CytoGenix will prepare and deliver to Argyll within a reasonable time
after such request or expiration or termination reports setting forth summaries
of the status and progress of the Program.

         3.2  SUCCESS OF PROGRAM.

              (a)  From time to time during the duration of the Program, at
the request of either party, and within thirty (30) days after the first to
occur of (i) the expiration of the Initial Term unless renewed, in which event
the expiration of the last unrenewed Renewal Term, or (ii) termination of the
Program under Section 2.1(a) (such thirty-day period, as it may be extended by
agreement of the parties, the "Evaluation Period"), CytoGenix and Argyll shall
determine in good faith whether the Program has resulted in any one or more
Commercial Formulations. In the event that the parties determine at any time
prior to the end of the Evaluation Period that the Program has resulted in one
or more Commercial Formulations (a "Determination of Success"), they shall
determine whether (i) to continue the Program to attempt to develop additional
Commercial Formulations or to terminate the Program under Section 2.6(b); and/or
(ii) to use their good faith efforts to enter into the Joint Venture (defined
below) as soon as practicable (the "Joint Venture Determination"); provided,
however, that if one or more Determinations of Success has been made with
respect to five (5) Commercial Formulations, the parties shall terminate the
Program under Section 2.6(b) and the Joint Venture Determination will be deemed
to have been made at the time of the Determination of Success with respect to
the fifth Commercial Formulation; and provided further, that if at least one
Determination of Success has been made prior to the end of the Evaluation Period
and no Joint Venture Determination has been made by the parties, the Joint
Venture Determination will be deemed to have been made at the end of the
Evaluation Period and the parties may terminate the Program at such time under
Section 2.6(b).

              (b)  If the parties do not make a Determination of Success on
or before the expiration of the Evaluation Period, or if for any reason the
parties fail to enter into a Joint Venture not later than sixty (60) days after
the Joint Venture Determination has been made or deemed made (such sixty-day
period, as it may be extended by agreement of the parties, the "Formation
Period"); then

                   (i)  neither party shall have any further rights or
         obligations pursuant to Articles IV and V hereof; and

                   (ii) all other provisions of this Agreement shall remain
         in full force and effect.

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         3.3  RIGHTS AND OBLIGATIONS AT CLOSE OF THE PROGRAM. At such time as
the Program comes to any end, whether by expiration or as a result of early
termination by CytoGenix or Argyll:

              (a)  neither party shall have any further obligations to make
technology available pursuant to Section 2.5;

              (b)  with respect to technology that either party has
previously made available for purposes of the Program pursuant to Section 2.5,
neither party shall have any license or right to use any patent rights or
other proprietary technology of the other, and each party's rights to use or
disclose Confidential Information of the other party shall be governed by the
provisions of Article VI; and

              (c)  except as provided in Section 3.4, neither party may use
any information in its possession that was generated in the course of the
Program.

         3.4  INVENTIONS. With respect to any inventions, discoveries,
formulations, processes or procedures, trade secrets, or other technical
information or know-how (hereinafter collectively, "Inventions") conceived or
reduced to practice as a result of or otherwise in the course of the efforts
expended by CytoGenix and/or Argyll during the course of or as a consequence of
the Program:

              (a)  all such Inventions as they relate or arise from
Formulations or to both the CytoGenix Proprietary Technology and the Argyll
Proprietary Technology shall be owned jointly by the parties and the parties
will cooperate with each other with respect to the filing of patent applications
directed to such jointly owned Inventions and the enforcement of patent rights
with respect to jointly owned Inventions;

              (b)  all such Inventions as they relate to or arise from the
CytoGenix Proprietary Technology but not to Formulations or any of the Argyll
Proprietary Technology shall be owned by CytoGenix; and

              (c)  all such Inventions as they relate to or arise from the
Argyll Proprietary Technology but not to Formulations or any of the CytoGenix
Proprietary Technology shall be owned by Argyll.

                            ARTICLE IV: JOINT VENTURE

         4.1  FORMATION. During the Formation Period, the parties shall
negotiate in good faith to form a jointly owned business entity (the "Joint
Venture") to commercially exploit Commercial Formulation(s).

         4.2  AGREEMENT. The rights and obligations of the parties in and to
the Joint Venture will be set forth in one or more agreements acceptable to the
parties (the "Joint Venture Agreement") which the parties will execute and
deliver. It is agreed that the parties will seek to ensure that any Joint
Venture Agreement will incorporate and implement the following general
principles:

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              (a)  The business of the Joint Venture will be the commercial
exploitation of not more than five (5) Commercial Formulations through
manufacture and/or sale of products, sublicensing, or otherwise and all
activities related thereto;

              (b)  CytoGenix will license to the Joint Venture the CytoGenix
Proprietary Technology for use in such Commercial Formulation(s) pursuant to a
License Agreement substantially in the form attached hereto as Exhibit A and
incorporated herein by reference (the "CytoGenix License");

              (c)  Argyll will license to the Joint Venture the Argyll
Proprietary Technology for use in such Commercial Formulation(s) and the mark
"ZEFFR" pursuant to a Patent and Trademark License Agreement substantially in
the form attached hereto as Exhibit B and incorporated herein by reference (the
"Argyll License");

              (d)  The parties shall license to the Joint Venture any
Invention which is jointly owned by them as provided in Section 3.4 and which is
required for the production of Commercial Formulations, such license to be in
such form as is reasonably approved by the parties (the "Joint License");

              (e)  Initially, each of the parties will own a 50% interest in
the Joint Venture, provided, that the parties recognize that their equity
interests in the Joint Venture may be diluted on a pro-rata basis if the Joint
Venture obtains third party financing;

              (f)  Decision making for Joint Venture matters will be by a
Joint Venture management committee or board of directors (the "Governing
Board"), on which the representation and voting power will reflect the equity
interests of the Joint Venture equity owners;

              (g)  The Joint Venture will have the authority to produce and
sell Commercial Formulations in dosage form or otherwise or sublicense to others
the right to make, use and sell Commercial Formulations, all on terms approved
by the Governing Board, subject to the terms of the CytoGenix License, the
Argyll License and any Joint License;

              (h)  All Commercial Formulations sold by the Joint Venture or
any such sublicensee in any form shall comply with the Argyll License with
respect to the use of the trademark "ZEFFR"; and

              (i)  The Joint Venture shall be responsible for the payment of
all royalties due to the under the CytoGenix License, the Argyll License and any
Joint License; provided that CytoGenix shall be obligated to contribute to the
Joint Venture the CytoGenix Shares required to be delivered to Argyll pursuant
to the Argyll License.

         4.3  INVENTIONS OF JOINT VENTURE. Unless otherwise agreed by the
parties or as necessary to obtain third party financing, any Inventions
conceived or reduced to practice in the course of work by or for the Joint
Venture shall be owned, and the parties shall have rights therein, as
provided in Section 3.4; provided that any such Invention jointly owned by
the parties pursuant to Section 3.4 shall be subject to the Joint License.

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                         ARTICLE V: DELIVERIES TO ARGYLL

         5.1  CERTAIN DELIVERIES TO ARGYLL. (a) Contemporaneously with the
execution and delivery hereof, CytoGenix has delivered to Argyll the following:

                   (i)   $25,000 in cash, and

                   (ii)  Sixteen thousand, six hundred sixty-seven (16,667)
         shares of common stock, par value $0.001 per share, of CytoGenix (the
         "CytoGenix Shares") with a Fair Market Value as of the Effective Date
         of $50,000; and

              (b)  Within ten (10) business days after [March 31, 2001] and
each June 30, September 30, December 31 and March 31 thereafter until the first
to occur of (i) the expiration of the Evaluation Period if no Joint Venture
Determination has been made or deemed made; (ii) the expiration of the Formation
Period, if a Joint Venture Determination has been made or deemed made and the
Joint Venture has not been formed, or (iii) the due date of the first payment of
minimum royalty by the Joint Venture to Argyll pursuant to the Argyll License,
CytoGenix shall deliver to Argyll, at the option of CytoGenix, either the cash
amount of $25,000 or that number of CytoGenix Shares having a Fair Market Value
on such March 31, June 30, September 30 or December 31 (or, if the New York
Stock Exchange is not open for trading on such day, the immediately succeeding
day on which the New York Stock Exchange is open for trading) of $25,000.

         5.2  STOCK RIGHTS AGREEMENT. Contemporaneously herewith, CytoGenix and
Argyll are entering into a Stock Rights Agreement relating to CytoGenix Shares
delivered by CytoGenix pursuant to this Agreement or the Argyll License.

                           ARTICLE VI: CONFIDENTIALITY

         6.1  CONFIDENTIAL INFORMATION. Except as otherwise provided in this
Section 6.1, the CytoGenix License, if effected, the Argyll License, if effected
or the Joint License, if effected, for the duration of the Program and for a
period of ten (10) years thereafter, each party (a "Receiving Party") shall, and
shall cause its Representatives to, retain in confidence, not to disclose and to
use only for purposes of the Program any information and data supplied by the
other party (the "Disclosing Party") or on behalf of the Disclosing Party to the
Receiving Party or any of its Representatives under this Agreement, including,
without limitation, any information obtained directly or indirectly from the
Disclosing Party in the course of communications and contacts related to this
Agreement, whether obtained or derived incidentally, such as by visits to plants
or office locations or from discussions about peripheral technologies or
business information. The term "Representative" means any consultant, employee,
outside contractor, investigator, agent or representative.

         For purposes of this Section 6.1, all such information and data which
the Receiving Party is obligated to retain in confidence shall be called
"Confidential Information." At the Disclosing Party's request, the Receiving
Party shall, and shall cause its Representatives to, promptly return to the
Disclosing Party (if not already properly destroyed by the Receiving Party to
the satisfaction of the Disclosing Party), all Confidential Information and all
copies thereof, extracts therefrom and analyses or other materials based
thereon, except that the Receiving Party shall be permitted to disclose
Confidential Information (a) to such of its Representatives as need to know such

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Confidential Information in connection with the Program, each of whom shall be
informed by the Receiving Party of the confidential nature of the Confidential
Information (each of such Representatives shall, prior to disclosure, agree to
be bound by this Agreement); (b) to the extent required by applicable laws and
regulations or by any subpoena or similar legal process or requested by any
regulatory authority (provided that the Receiving Party shall give the
Disclosing Party prior notice of the disclosure unless such notice is prohibited
by law, subpoena or similar legal process); provided the Receiving Party will
use its best efforts to obtain confidential treatment of the Confidential
Information; (c) to the extent such Confidential Information (i) becomes
publicly available other than as a result of a breach of this Agreement, or (ii)
becomes available to the Receiving Party on a non-confidential basis from a
source other than the Disclosing Party and (iii) to the extent the Disclosing
Party shall have consented to such disclosure in writing. Specific information
shall not be deemed to fall within any of the exceptions enumerated in clause
(c) above merely because such information is embraced by more general
information in the public domain.

         6.2  PROGRAM DATA. All information relating to Inventions, Formulations
and Commercial Formulations, including information included in Program reports
and technical data generated in the course of the Program shall be "Confidential
Information" subject to the obligations of Section 6.1; provided that any party
may release or disclose, use or otherwise deal in and with Inventions owned
solely by it as described in Section 3.4 and any Confidential Information
related solely thereto.

                           ARTICLE VII: MISCELLANEOUS

         7.1  ASSIGNMENT: BENEFIT AND BINDING. This Agreement shall be binding
upon, and inure to the benefit of, CytoGenix and Argyll and their respective
successors and permitted assigns; provided, that except to a successor of
substantially its entire business to which this Agreement relates, neither party
hereto may assign its rights and obligations under this Agreement without the
prior written consent of the other party.

         7.2  EXPORT CONTROLS. It is understood that CytoGenix, Argyll and the
Joint Venture are (or will be) subject to United States laws and regulations
controlling the export of technical data, computer software, laboratory
prototypes and other commodities (including the Arms Export Control Act, as
amended, and the Export Administration Act of 1979), and that its obligations
hereunder are contingent on compliance with applicable United States export laws
and regulations. The transfer of certain technical data and commodities outside
the United States may be prohibited, and even if permitted may require a license
from the cognizant agency of the United States Government and/or written
assurances by CytoGenix, Argyll or the Joint Venture that CytoGenix, Argyll or
the Joint Venture shall not export data or commodities to certain foreign
countries without prior approval of such agency. Neither CytoGenix, nor Argyll,
nor the Joint Venture represent that a license shall not be required or that, if
required, it shall be issued.

         7.3  NOTICES. Any notice or communication given pursuant to this
Agreement by either party to the other shall be in writing and delivered or
mailed by registered or certified mail, postage prepaid (mailed notices shall be
deemed given when duly mailed), as follows:

         If to Argyll:

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                           Mark E. Wilson
                           Managing Director
                           Argyll Scientific, L.L.C..
                           4123 Drummond Ste 100
                           Houston, TX  77025-2311
                           (713) 621-0381
             Facsimile:    (713) 621-3305

         If to CytoGenix:

                           Malcolm Skolnick, PhD, JD, [With a copy to:
                           Dell Gibson, Chairman]
                           President & CEO
                           CytoGenix, Inc.
                           9881 S. Wilcrest
                           Houston, TX  77099
                           (281) 988-6118
             Facsimile:    (281) 988-6727

Either party may change its address for purposes of this Section by written
notice to the other party.

         7.4  APPLICABLE LAW; ENTIRE AGREEMENT; HEADINGS. This Agreement shall
be construed in accordance with the laws of Texas. This Agreement may be
executed in two or more counterparts, each of which shall be deemed an
original, but all of which together shall constitute one and the same
instrument. This Agreement and the other agreements, certificates, instruments
and documents provided for or contemplated by this Agreement contain the
entire agreement between the parties with respect to the subject matter of
this Agreement and supersede all prior agreements and understandings. The
headings contained in this Agreement are for reference purposes only and
shall not affect the meaning or interpretation of this Agreement.

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed and delivered by their duly authorized officers as of the date first
written above.

CYTOGENIX, INC.                        ARGYLL SCIENTIFIC, L.L.C.

Name:   /s/ Malcolm Skolnick           Name: /s/ Mark E. Wilson
     ----------------------------           -----------------------------
        Malcolm Skolnick                      Mark E. Wilson
Title:  President & CEO                Title: Managing Director

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                                                                    EXHIBIT 10.9

                             STOCK RIGHTS AGREEMENT

         This Stock Rights Agreement ("Agreement"), will be effective as of
March 10, 2000 (the "Effective Date") is between CytoGenix, Inc., a Nevada
corporation ("CytoGenix") and Argyll Scientific, L.L.C., a Texas limited
liability company ("Argyll").

         WHEREAS, CytoGenix and Argyll are parties to a Research and Development
Agreement dated the date hereof ("Research and Development Agreement") pursuant
to which shares of common stock of CytoGenix, par value $0.001 per share, of
CytoGenix (the "CytoGenix Shares") may be delivered by CytoGenix to Argyll; and

         WHEREAS, under the Research and Development Agreement, a joint venture
may be formed by CytoGenix and Argyll (the "Joint Venture") and in connection
therewith, Argyll may enter into a patent and trademark license agreement with
such Joint Venture in substantially the form attached to the Research and
Development Agreement ("Argyll License Agreement"); and

         WHEREAS, pursuant to the Argyll License Agreement, the Joint Venture
may be required to deliver CytoGenix Shares to Argyll as set forth therein; and

         WHEREAS, Argyll is relying upon the execution, delivery and performance
of this Agreement by CytoGenix in entering into the Research and Development
Agreement and the Joint Venture Agreement contemplated by the Research and
Development Agreement and the Argyll License Agreement;

         NOW THEREFORE, in consideration of the mutual covenants herein set
forth, the parties hereto agree as follows:

         1. DELIVERY OF CYTOGENIX SHARES. Contemporaneously herewith, CytoGenix
has delivered to Argyll certificates representing Sixteen thousand, six hundred
sixty-seven CytoGenix Shares, as required by Section 5.1(a) of the Research and
Development Agreement. CytoGenix has also agreed in the Research and Development
Agreement to deliver to Argyll additional cash payments or additional CytoGenix
Shares.

         If the Joint Venture is formed and the Argyll License Agreement is
entered into by Argyll and the Joint Venture, CytoGenix hereby agrees to deliver
to the Joint Venture, for delivery to Argyll, in the amounts and at the times
required under the Argyll License Agreement, certificates representing that
number of CytoGenix Shares required to be delivered by the Joint Venture to
Argyll under the Argyll License Agreement.

         2. Registration of CytoGenix Shares.

                  (a) CytoGenix shall file, within Thirty (30) days from the
Effective Date, with the Securities and Exchange Commission (the "Commission") a
registration statement under the Securities Act of 1933, as amended (the
"Securities Act") on Form S-1 or Form S-3, if available, for a public offering
of all the CytoGenix Shares delivered or to be delivered to Argyll under the
Research and Development Agreement or the Argyll License Agreement to be made on
a continuous

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basis pursuant to Rule 415 of the Securities Act (the "Registration
Statement") and will use its best efforts to cause such Registration
Statement to become effective as soon as practicable and to remain
continuously effective until the earlier of (i) the date upon which Argyll
becomes eligible to sell CytoGenix Shares delivered or to be delivered to
Argyll under the Research and Development Agreement or the Argyll License
Agreement under Rule 144(k) of the Securities Act or (ii) the third
anniversary of each delivery of CytoGenix Shares to Argyll under the Research
and Development Agreement or the Argyll License Agreement.

                  (b) If and when CytoGenix is required by this Agreement to use
its best efforts to effect the registration of any CytoGenix Shares:

                           (i) CytoGenix shall, as soon as practicable:

                                    (1)     prepare and file with the Commission
         under the Securities Act a registration statement with respect to such
         CytoGenix Shares which shall state that the CytoGenix Shares are
         covered thereby, and use its best efforts to cause such registration
         statement to become effective and to remain effective as provided
         herein;

                                    (2)     prepare and file with the Commission
         such amendments and supplements, if any, to such registration statement
         and the prospectus used in connection therewith as may be necessary to
         keep such registration statement effective until the completion of the
         distribution under such registration statement, and comply with the
         provisions of the Securities Act applicable to it with respect to the
         disposition of all securities covered by such registration statement
         during such period in accordance with the intended methods of
         disposition by Argyll set forth in such registration statement;

                                    (3)     furnish to Argyll such number of
         copies of such registration statement (including exhibits), each
         amendment and supplement thereto, the prospectus included in such
         registration statement or filed with the Commission (including each
         preliminary prospectus), and each amendment and supplement thereto as
         Argyll may reasonably request to facilitate the disposition of the
         CytoGenix Shares owned by Argyll and covered by such registration
         statement;

                                    (4)     use its best efforts to (A) register
         or qualify such CytoGenix Shares under the securities or "blue sky"
         laws of such jurisdictions as Argyll or the managing underwriter (if
         any) may reasonably request; (B) keep such registrations or
         qualifications in effect for so long as such registration statement is
         in effect; and (C) take any and all other reasonably actions that may
         be necessary or appropriate to enable Argyll and each underwriter (if
         any) to consummate the disposition in such jurisdictions of the
         relevant CytoGenix Shares; provided, however, that CytoGenix shall not
         be required to (x) qualify generally to transact business as a foreign
         corporation in any jurisdiction where it would not otherwise be
         required to qualify but for the requirements of this Section; (y)
         subject itself to taxation in any such jurisdiction; or (z) consent to
         general service of process in any such jurisdiction;

                                    (5)     (A) at any time when a prospectus
         relating thereto is required to be delivered under the Securities Act,
         notify Argyll when it becomes aware of the

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         occurrence of any event as a result of which the prospectus (as
         then amended or supplemented) contains any untrue statement of a
         material fact or omits any fact necessary to make the statements
         therein, in the light of the circumstances under which they were
         made, not misleading; and (B) at the request of Argyll, as promptly
         as practicable thereafter, prepare in sufficient quantities and
         furnish to Argyll a reasonable number of copies of a prospectus
         supplemented or amended so that, as thereafter delivered to the
         offerees or purchasers of such CytoGenix Shares, such prospectus
         will not contain any untrue statement of a material fact or omit to
         state any fact necessary to make the statements therein, in the
         light of the circumstances then existing, not misleading. Argyll
         agrees, upon receipt of a notice of the foregoing it shall
         forthwith cease making offers and sales of the CytoGenix Shares
         pursuant to the registration statement or deliveries of the
         prospectus contained therein and to return to CytoGenix for
         modification and exchange, the copies of such prospectus not
         theretofore delivered by Argyll.

                                    (6)     comply with all applicable rules and
         regulations of the Commission;

                                    (7)     use its best efforts to cause all
         such CytoGenix Shares covered by such registration statement to be
         listed on any securities exchange or automated quotation system, if
         any, on which similar securities of CytoGenix are then listed, if the
         listing of such CytoGenix Shares is then permitted under the rules of
         such exchange or automated quotation system;

                                    (8)     subject to the execution of
         confidentiality agreements, in form and substance reasonably
         satisfactory to CytoGenix, (A) make reasonably available for inspection
         by Argyll, its legal counsel, and any accountant or other agent
         retained by it, all financial and other records, relevant corporate
         documents, and properties of CytoGenix, and (B) cause CytoGenix's
         directors, officers, employees, counsel and independent public
         accountants to supply all information reasonably requested by, and to
         respond to inquiries from, Argyll, any such legal counsel, attorney,
         accountant or agent in connection with such registration statement, in
         each instance to the extent that such information is reasonably
         necessary to satisfy any of its obligations under applicable law;

                                    (9)     provide (A) Argyll, (B) each
         underwriter (which, for purposes of this Agreement, shall include any
         person deemed to be an underwriter within the meaning of Section 2(11)
         of the Securities Act), if any, of the securities being sold, (C)
         counsel of such underwriters, and (D) the counsel of Argyll the
         opportunity to participate in the preparation of such registration
         statement, each amendment or supplement thereto, each prospectus
         included therein or filed with the Commission, and each amendment or
         supplement thereto;

                                    (10)    promptly notify Argyll and, upon
         request by Argyll, confirm such advice in writing, (A) when such
         registration statement, the prospectus or any prospectus supplement or
         post-effective amendment has been filed, and, with respect to such
         registration statement or any post-effective amendment thereto, when
         the same has become effective, (B) of the issuance by the Commission of
         any stop order suspending the effectiveness of such registration
         statement or the initiation of any proceeding for such

                                       -3-

<Page>

         purpose, or (C) of the receipt by CytoGenix of any notification
         with respect to the suspension of the registration or qualification
         of such CytoGenix Shares for sale in any jurisdiction or the
         initiation of any proceeding for such purpose; and

                                    (11)    use its best efforts to obtain the
         withdrawal of any order suspending the effectiveness of such
         registration statement or any post-effective amendment thereto.

                           (ii) The obligation of CytoGenix to effect the
registration of CytoGenix Shares pursuant to this Section 2 shall be subject to,
and conditioned upon, the obligation of Argyll to furnish CytoGenix, upon
CytoGenix's written request, with all information regarding Argyll and the
intended distribution of Argyll's CytoGenix Shares included in such registration
for the purpose of preparing the registration statement, to the extent that such
information is required to comply with applicable legal requirements. If any
such registration statement refers to Argyll by name or otherwise as the holder
of any securities of CytoGenix, then Argyll shall have the right to require (A)
the insertion therein of language, in form and substance satisfactory to Argyll,
to the effect that the holding by Argyll of such securities is not to be
construed as a recommendation by Argyll of the investment quality of the
securities thereby and that such holding does not imply that Argyll will assist
in meeting any future financial requirements of CytoGenix, or (B) the deletion
of such reference to Argyll if, in the judgment of CytoGenix, as advised by
counsel, such reference is not required by the Securities Act or any similar
federal statute or any state securities of blue sky law then in effect.

                           (iii) Argyll shall comply with the requirements of
delivering a current prospectus to the purchaser of CytoGenix Shares in any
sale, to the extent such requirement is applicable under federal and state
securities laws.

                  (c) The expenses of registration of CytoGenix Shares pursuant
to this Section will be paid by CytoGenix. For purposes of this Section, the
term "expenses" shall include federal, state and other registration and
qualification fees and legal fees and expenses for Argyll's counsel, auditing
and accounting expenses incurred by CytoGenix in connection with the
registration and printing and other related expenses including salary and
related overhead expenses of employees of CytoGenix for time expended by such
employees.

                  (d) To the extent permitted by law, CytoGenix will indemnify
and hold harmless Argyll, its members, managers and officers, and each person
who controls Argyll, against any losses, claims, damages or liabilities, joint
or several, to which any of them may become subject under the Securities Act or
otherwise, insofar as such losses, claims, damages or liabilities (or actions in
respect thereof) arise out of or are based upon any untrue or alleged untrue
statement or any material fact contained or expressly incorporated by reference
in any registration statement, including any preliminary prospectus or final
prospectus contained therein or any amendment or supplement thereto, or arise
out of or are based upon the omission or alleged omission to state therein a
material fact required to be stated therein, and will reimburse Argyll, its
members, managers and officers and controlling persons for any legal or other
expenses reasonably incurred by them in connection with investigating or
defending any such loss, claim, damage, liability or action, as such expenses
are incurred; provided, however, that the indemnity agreement contained in this
Section shall not apply to amounts paid in settlement of any such loss, claim,
damage, liability or action if such settlement

                                       -4-

<Page>

is effected without CytoGenix's consent nor shall CytoGenix be liable in any
such case for any such loss, claim, damage, liability or action to the extent
that it arises out of or is based upon an untrue statement or alleged untrue
statement or omission or alleged omission made in connection with any
registration statement, preliminary prospectus, final prospectus or amendment
or supplement thereto in reliance upon and in conformity with written
information furnished expressly for use in connection with such registration
by Argyll, its members, managers and officers or, any controlling person of
Argyll.

         3. Price Guarantee and Other Matters.

                  (a) The CytoGenix Shares delivered at any time to Argyll by
CytoGenix under the Research and Development Agreement or at any time delivered
to Argyll under the Argyll License Agreement are referred to in this Section as
the "Subject Shares." In the event Argyll makes one or more sales of any Subject
Shares (each such sale of Subject Shares, whether one or more Subject Shares, in
one transaction being referred to as a "Subject Shares Sale") and receives Net
Proceeds (as defined below) from such Subject Shares Sale of less than the Fair
Market Value (as determined in accordance with and for purposes of and as of the
date set forth in the Research and Development Agreement, as to Subject Shares
delivered to Argyll pursuant to the Research and Development Agreement, or as
determined in accordance with and for purposes of and as of the date set forth
in the Argyll License Agreement, as to Subject Shares delivered to Argyll
pursuant to the Argyll License Agreement) of all of the Subject Shares sold in
such Subject Shares Sale (the "Applicable Fair Market Value"), then Argyll may,
at any time within thirty (30) days after such Subject Shares Sale, give notice
to CytoGenix (accompanied by a sales confirmation or other evidence of such Net
Proceeds) that Argyll has elected to make a call upon CytoGenix's price
guarantee. Within ten (10) days following delivery of such notice by Argyll,
CytoGenix shall either (i) pay to Argyll, by wire transfer of immediately
available funds to an account designated by Argyll in such notice, the cash
amount equal to the difference between (i) the Applicable Fair Market Value of
the Subject Shares so sold in such Subject Shares Sale and such Net Proceeds
received by Argyll in such Subject Shares Sale (the "Make-Whole Amount"), or
(ii) deliver to Argyll an additional number of CytoGenix Shares ("Make-Whole
Shares") of an aggregate Fair Market Value (as defined in the Research and
Development Agreement, whether or not then in effect), as of the day immediately
prior to such delivery (or if the New York Stock Exchange was not open for
trading on such day, the immediately preceding day on which the New York Stock
Exchange was open for trading) equal to the Make-Whole Amount. If the Make-Whole
Net Proceeds (as defined below) received by Argyll from the sale of all of the
Make-Whole Shares do not equal or exceed the Make-Whole Amount, then Argyll may,
at any time within thirty (30) days after the sale of the last Make-Whole Share
by Argyll, give notice to CytoGenix (accompanied by a sales confirmation or
other evidence of such Make-Whole Net Proceeds) that Argyll has elected to make
a call upon CytoGenix's price guarantee. Within ten (10) days following delivery
of such notice by Argyll, CytoGenix shall pay to Argyll, by wire transfer of
immediately available funds to an account designated by Argyll in such notice,
the cash amount equal to the difference between the Make-Whole Amount and such
Make-Whole Net Proceeds. For purposes hereof, (A) the term "Net Proceeds" means
the aggregate net proceeds received by Argyll from the sale of Subject Shares in
any one Subject Shares Sale, less commissions and other selling expenses
incurred by Argyll in connection with such Subject Shares Sale, and (B) the term
"Make-Whole Net Proceeds" means the net proceeds received by Argyll from the
sale of all of the Make-Whole Shares, less commissions and other selling
expenses incurred by Argyll in connection therewith. This Section 3(a) shall
apply

                                       -5-

<Page>

with respect to all Subject Shares Sales and all sales of Make-Whole Shares
by Argyll occurring prior to the fifth anniversary of the Effective Date.

                  (b) If for any reason a registration statement or
post-effective amendment thereto has not been declared effective or does not
remain effective in a manner which permits Argyll to publicly resell any Subject
Shares or Make-Whole Shares at any time after sixty (60) days from the date of
the receipt by Argyll of such shares, Argyll may, at any time within thirty (30)
days after the expiration of such sixty (60) day period, by written notice to
CytoGenix, require CytoGenix to repurchase such shares (the "Repurchase Shares")
for a cash amount equal to (i) the Fair Market Value of all of the Repurchase
Shares (as determined in accordance with and for the purpose of and as of the
date set forth in the Research and Development Agreement or the Argyll License
Agreement pursuant to which such Repurchase Shares were delivered to Argyll or,
as to Make-Whole Shares which are Repurchase Shares, as determined as set forth
in Section 3(a)), plus (ii) interest on such amount from the date of delivery of
the Repurchase Shares to Argyll to the date of payment at a rate per annum equal
to the lesser of 5% over the then current prime rate of interest announced by
Citibank, N.A. or the maximum rate permitted by law, and CytoGenix shall, within
ten (10) days after receipt of such notice, deliver to Argyll such cash amount
by wire transfer of immediately available funds to an account designated by
Argyll in such notice, and Argyll shall, immediately upon receipt of such funds,
deliver to CytoGenix certificate(s) representing the Repurchase Shares, duly
endorsed for transfer into the name of CytoGenix.

                  (c) Argyll represents and warrants that except for CytoGenix
Shares delivered to Argyll pursuant to a registration statement filed and
declared effective under the Securities Act, it is acquiring and will acquire
the Subject Shares and the Make-Whole Shares for investment and not with a view
to the distribution thereof in violation of applicable securities laws.

         4. Miscellaneous.

                  (a) This Agreement shall be binding upon, and inure to the
benefit of, CytoGenix and Argyll and their respective successors and permitted
assigns. Except to a successor of substantially its entire business to which
this Agreement relates, neither party hereto may assign its rights and
obligations under this Agreement without the prior written consent of the other
party.

                  (b) Any notice or communication given pursuant to this
Agreement by either party to the other shall be in writing and delivered or
mailed by registered or certified mail, postage prepaid (mailed notices shall be
deemed given when duly mailed), as follows:

               If to Argyll:

                           Mark E. Wilson
                           Managing Director
                           Argyll Scientific, L.L.C..
                           4123 Drummond Ste 100
                           Houston, TX  77025-2311
                           (713) 621-0381
         Facsimile:        (713) 621-3305

               If to CytoGenix:

                                       -6-

<Page>

                           Malcolm Skolnick, PhD, JD,  [With a copy to:
                           Dell Gibson, Chairman]
                           President & CEO
                           CytoGenix, Inc.
                           9881 S. Wilcrest
                           Houston, TX  77099
                           (281) 988-6118
         Facsimile:        (281) 988-6727

                  (c) This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument. This Agreement and the
other agreements, certificates, instruments and documents provided for or
contemplated by this Agreement contain the entire agreement between the parties
with respect to the subject matter of this Agreement and supersede all prior
agreements and understandings. The headings contained in this Agreement are for
reference purposes only and shall not affect the meaning or interpretation of
this Agreement.

                  (d) If there is any change in the CytoGenix Shares by way of
stock split, reverse stock split, stock dividend, reclassification, merger,
consolidation, reorganization, re-capitalization, or any other means, then all
appropriate adjustments to the provisions hereof shall be made so that the
rights and obligations of the parties hereto under this Agreement shall continue
with respect to the CytoGenix Shares as so changed.

                  (e) If a court of competent jurisdiction declares that any
provision of this Agreement is illegal, invalid or unenforceable, then such
provision shall be modified automatically to the extent necessary to make such
provision fully legal, valid or enforceable. If such court does not modify any
such provision as contemplated herein, but instead declares it to be wholly
illegal, invalid or unenforceable, then such provision shall be severed from
this Agreement, this Agreement and the rights and obligations of the parties
hereto shall be construed as if this Agreement did not contain such severed
provision, and this Agreement otherwise shall remain in full force and effect.
No alteration, modification, amendment, change or waiver of any provision of
this Agreement shall be effective or binding on any party hereto unless the same
is in writing and is executed by the parties.

                  (f) Each party acknowledges that in the event of any breach of
this Agreement by such party, the other party hereto (i) would be irreparably
and immediately harmed by such breach, (ii) could not be made whole by monetary
damages, and (iii) shall be entitled to temporary and permanent injunctions (or
their functional equivalents) to prevent any such breach and/or to compel
specific performance with this Agreement, in addition to all other remedies to
which such party may be entitled at law or in equity.

                  (g) This Agreement shall be governed by, construed under, and
enforced in accordance with the laws of the State of Texas without reference to
the conflict-of-laws provisions thereof.

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed and delivered by their duly authorized officers as of the date first
written above.

                                       -7-

<Page>

CYTOGENIX, INC.                                      ARGYLL SCIENTIFIC, L.L.C.

Name:    /s/ Malcolm Skolnick                        Name:    /s/ Mark E. Wilson
         --------------------                                 ------------------
         Malcolm Skolnick                                     Mark E. Wilson

Title:   President and CEO                           Title:   Managing Director

                                       -8-

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