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                                                                 EXHIBIT 10.21


                                 IMMUSOL, INC.

                       PROPRIETARY INFORMATION AGREEMENT

         As a condition of my employment with Immusol, Inc., its subsidiaries,
affiliates, successors or assigns (together the "Company"), and in
consideration of my employment with the Company and my receipt of the
compensation now and hereafter paid to me by Company, I agree to the following:

         I.      At-Will Employment.  I understand and acknowledge that my
employment with the Company is for an unspecified duration and constitutes
"at-will" employment.  I acknowledge that this employment relationship may be
terminated at any time, with or without good cause for any or no cause, at the
option either of the Company or myself, with or without notice.

         II.     Confidential Information.

                 A.       Company Information.  I agree at all times during the
term of my employment and thereafter, to hold in strictest confidence, and not
to use, except of the benefit of the Company, or to disclose to any person, firm
or corporation without written authorization of the Board of Directors of the
Company, any Confidential Information of the Company.  I understand that
"Confidential Information" means any Company proprietary information, technical
data, trade secrets or know-how, including, but not limited to, research,
product plans, products, services, customer lists and customers (including, but
not limited to, customers of the Company on whom I called or with whom I became
acquainted during the term of my employment), markets, software, developments,
inventions, processes, formulas, technology, designs, drawings, engineering,
hardware configuration information, marketing, finances or other business
information disclosed to me by the Company either directly or indirectly in
writing, orally or by drawings or observation of parts or equipment.  I further
understand that Confidential Information does not include any of the foregoing
items which has become publicly known and made generally available through no
wrongful act of mine or of others who were under confidentiality obligations as
to the item or items involved.

                 B.       Former Employer Information.  I agree that I will
not, during my employment with the Company, improperly use or disclose any
proprietary information or trade secrets of any former or concurrent employer
or other person or entity and that I will not bring onto the premises of the
Company any unpublished document or proprietary information belonging to any
such employer, person or entity unless consented to in writing by such
employer, person or entity.

                 C.       Third Party Information.  I recognize that the
Company has received and in the future will receive from third parties their
confidential or proprietary information subject to a duty on the Company's part
to maintain the confidentiality of such information





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and to use it only for certain limited purposes.  I agree to hold all such
confidential or proprietary information in the strictest confidence and not to
disclose it to any person, firm or corporation or to use it except as necessary
in carrying out my work for the Company consistent with the Company's agreement
with such third party.

         III.    Inventions.

                 A.       Inventions Retained and Licensed.  I have attached
hereto, as Exhibit A, a list describing all inventions, original works of
authorship, developments, improvements, and trade secrets which were made by me
prior to my employment with the Company (collectively referred to as "Prior
Inventions"), which belong to me, which relate to the Company's proposed
business, products or research and development, and which are not assigned to
the Company hereunder; or, if no such list is attached, I represent that there
are no such Prior Inventions.  If in the course of my employment with the
Company, I incorporate into a Company product, process or machine a Prior
Invention owned by me or in which I have an interest, the Company is hereby
granted and shall have a nonexclusive, royalty-free, irrevocable, perpetual,
worldwide license to make, have made, modify, use and sell such Prior Invention
as part of or in connection with such product, process or machine.

                 B.       Assignment of Inventions.  I agree that I will
promptly make full written disclosure to the Company, will hold in trust for
the sole right and benefit of the Company, and hereby assign to the Company, or
its designee, all my right, title, and interest in and to any and all
inventions, original works of authorship, developments, concepts, improvements
or trade secrets, whether or not patentable or registrable under copyright or
similar laws, which I may solely or jointly conceive or develop or reduce to
practice, or cause to be conceived or developed or reduced to practice, during
the period of time I am in the employ of the Company (collectively referred to
as "Inventions"), except as provided in Section 3(f) below.  I further
acknowledge that all original works of authorship which are made by me (solely
or jointly with others) within the scope of and during the period of my
employment with the Company and which are protectible by copyright are "works
made for hire," as that term is defined in the United States Copyright Act.

                 C.       Inventions Assigned to the United States.  I agree to
assign to the United States government all my right, title, and interest in and
to any and all Inventions whenever such full title is required to be in the
United States by a contract between the Company and the United States or any of
its agencies.

                 D.       Maintenance of Records.  I agree to keep and maintain
adequate and current written records of all Inventions made by me (solely or
jointly with others) during the terms of my employment with the Company.  The
records will be in the form of notes, sketches, drawings, and any other format
that may be specified by the Company.  The records will be available to and
remain the sole property of the Company at all times.





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                 E.       Patent and Copyrights Registrations.  I agree to
assist the Company, or its designee, at the Company's expense, in every proper
way to secure the Company's rights in the Inventions and any copyrights,
patents, mask work rights or other intellectual property rights relating
thereto in any and all countries, including the disclosure to the Company of
all pertinent information and data with respect thereto, the execution of all
applications, specifications, oaths, assignments and all other instruments
which the Company shall deem necessary in order to apply for and obtain such
rights and in order to assign and convey to the Company, its successors,
assigns and nominees the sole and exclusive rights, title and interest in and
to such Inventions, and any copyrights, patents, mask work rights or other
intellectual property rights relating thereto.  I further agree that my
obligation to execute or cause to be executed, when it is in my power to do so,
any such instrument or papers shall continue after the termination of this
Agreement.  If the Company is unable because of my mental or physical
incapacity or for any other reason to secure my signature to apply for or to
pursue any application for any United States or foreign patents or copyright
registrations covering Inventions or original works of authorship assigned to
the Company as above, then I hereby irrevocably designate and appoint the
Company and its duly authorized officers and agents as my agent and attorney in
fact, to act for and in my behalf and stead to execute and file any such
applications and to do all other lawfully permitted acts to further the
prosecution and issuance of letters patent or copyright registrations thereon
with the same legal force and effect as if executed by me.

                 F.       Exception to Assignments.  I understand that the
provisions of this Agreement requiring assignment of Inventions to the Company
do not apply to any invention which qualifies fully under the provisions of
California Labor Code Section 2870 (attached hereto as Exhibit B).  I will
advise the Company promptly in writing of any inventions that I believe meet
the criteria in California Labor Code Section 2870 and not otherwise disclosed
on Exhibit A.

         IV.     Conflicting Employment.  I agree that, during the term of my
employment with the Company, I will not engage in any other employment,
occupation, consulting or other business activity directly related to the
business in which the Company is now involved or becomes involved during the
term of my employment, nor will I engage in any other activities that conflict
with my obligations to the Company.

         V.      Returning Company Documents.  I agree that, at the time of
leaving the employ of the Company, I will deliver to the Company (and will not
keep in my possession, recreate or deliver to anyone else) any and all devices,
records, data, notes, reports, proposals, lists, correspondence,
specifications, drawings, blueprints, sketches, materials, equipment, other
documents or property, or reproductions of any aforementioned items developed
by me pursuant to my employment with the Company or otherwise belonging to the
Company, its successors or assigns.  In the event of the termination of my
employment, I agree to sign and deliver the "Termination Certification"
attached hereto as Exhibit C.





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         VI.     Notification to New Employer.  In the event that I leave the
employ of the Company, I hereby grant consent to notification by the Company to
my new employer about my rights and obligations under this Agreement.

         VII.    Solicitation of Employees.  I agree that for a period of
twelve (12) months immediately following the termination of my relationship
with the Company for any reason, whether with or without cause, I shall not
either directly or indirectly solicit, induce, recruit or encourage any of the
Company's employees to leave their employment, or take away such employees, or
attempt to solicit, induce, recruit, encourage or take away employees of the
Company, either for myself or for any other person or entity.

         VIII.   Conflict of Interest Guidelines.  I agree to diligently adhere
to the Conflict of Interest Guidelines attached as Exhibit D hereto.

         IX.     Representations.  I agree to execute any proper oath or verify
any proper document required to carry out the terms of this Agreement.  I
represent that my performance of all the terms of this Agreement will not
breach any agreement to keep in confidence proprietary information acquired by
me in confidence or in trust prior to my employment by the Company.  I have not
entered into, and I agree I will not enter into, any oral or written agreement
in conflict herewith.

         X.      Arbitration and Equitable Relief.

                 A.       Arbitration.  Except as provided in Section 10(b)
below, I agree that any dispute or controversy arising out of or relating to
any interpretation, construction, performance or breach of this Agreement,
shall be settled by arbitration to be held in Santa Clara County, California,
in accordance with the rules then in effect of the American Arbitration
Association.  The arbitrator may grant injunctions or other relief in such
dispute or controversy.  The decision of the arbitrator shall be final,
conclusive and binding on the parties to the arbitration.  Judgement may be
entered on the arbitrator's decision in any court having jurisdiction.  The
Company and I shall each pay one-half of the costs and expenses of such
arbitration, and each of us shall separately pay our counsel fees and expenses.

                 B.       Equitable Remedies.  I agree that it would be
impossible or inadequate to measure and calculate the Company's damages from
any breach of the covenants set forth in Sections 2, 3, and 5 herein.
Accordingly, I agree that if I breach any of such Sections, the Company will
have available, in addition to any other right or remedy available, the right
to obtain an injunction from a court of competent jurisdiction restraining such
breach or threatened breach and to specific performance of any such provision
of this Agreement.  I further agree that no bond or other security shall be
required in obtaining such equitable relief and I hereby consent to the
issuance of such injunction and to the ordering of specific performance.





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         XI.     General Provisions.

                 A.       Governing Law; Consent to Personal Jurisdiction.
This Agreement will be governed by the laws of the State of California.  I
hereby expressly consent to the personal jurisdiction of the state and federal
courts located in California for any lawsuit filed there against me by the
Company arising from or relating to this Agreement.

                 B.       Entire Agreement.  This Agreement sets forth the
entire agreement and understanding between the Company and me relating to the
subject matter herein and merges all prior discussions between us.  No
modification of or amendment to this Agreement, nor any waiver of any rights
under this agreement, will be effective unless in writing signed by the party
to be charged.  Any subsequent change or changes in my duties, salary or
compensation will not affect the validity or scope of this Agreement.

                 C.       Severability.  If one or more of the provisions in
this Agreement are deemed void by law, then the remaining provisions will
continue in full force and effect.

                 D.       Successors and Assigns.  This Agreement will be
binding upon my heirs, executors, administrators and other legal
representatives and will  be for the benefit of the Company, its successors,
and its assigns.

Date: ____________________



                                       ______________________________
                                       Signature


                                       ______________________________
                                       Name of Employee
                                       (typed or printed)



_________________________
Witness





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                                   EXHIBIT A


                            LIST OF PRIOR INVENTIONS
                        AND ORIGINAL WORKS OF AUTHORSHIP






                                                                                 Identifying Number
                   Title                               Date                     or Brief Description
                   -----                               ----                     --------------------



              
         ____    No inventions or improvements

         ___     Additional Sheets Attached



Signature of Employee:    _________________________


Print Name of Employee:   _________________________


Date:    ______________________





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                                   EXHIBIT B


                       CALIFORNIA LABOR CODE SECTION 2870

                  EMPLOYMENT AGREEMENTS; ASSIGNMENT OF RIGHTS



         "(a)    Any provision in an employment agreement which provides that
an employee shall assign, or offer to assign, any of his or her rights in an
invention to his or her employee shall not apply to an invention that the
employee developed entirely on his or her own time without using the employer's
equipment, supplies, facilities, or trade secret information except for those
inventions that either:

                 (1)      Relate at the time of conception or reduction to
practice of the invention to the employer's business, or actual or demonstrably
anticipated research or development of the employer.

                 (2)      Result from any work performed by the employee for
the employer.

         (b)     To the extent a provision in an employment agreement purports
to require an employee to assign an invention otherwise excluded from being
required to be assigned under subdivision (a), the provision is against the
public policy of this state and is unenforceable."





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                                   EXHIBIT C


                                 IMMUSOL, INC.

                           TERMINATION CERTIFICATION


         This is to certify that I do not have in my possession, nor have I
failed to return, any devices, records, data, notes, reports, proposals, lists,
correspondence, specifications, drawings, blueprints, sketches, materials,
equipment, other documents or property, or reproductions of any aforementioned
items belonging to Immusol, Inc. its subsidiaries, affiliates, successors or
assigns (together, the "Company").

         I further certify that I have complied with all the terms of the
Company's Employment, Confidential Information and Invention Assignment
Agreement signed by me, including the reporting of any inventions and original
works of authorship (as defined therein) conceived or made by me (solely or
jointly with others) covered by that agreement.

         I further agree that, in compliance with the Employment, Confidential
Information and Invention Assignment Agreement, I will preserve as confidential
all trade secrets, confidential knowledge, data or other proprietary
information relating to products, processes, know-how, designs, formulas,
developmental or experimental work, computer programs, data bases, other
original works of authorship, customer lists, business plans, financial
information or other subject matter pertaining to any business of the Company
or any of its employees, client, consultants or licensees.

         I further agree that for twelve (12) months from this date, I will not
hire any employees of the Company and I will not solicit, induce, recruit or
encourage any of the Company's employees to leave their employment.

Date: ____________________


                                        ______________________________
                                       (Employee's Signature)


                                       ______________________________
                                       (Type/Print Employee's Name)





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                                   EXHIBIT D

                                 IMMUSOL, INC.

                        CONFLICT OF INTEREST GUIDELINES



         It is the policy of Immusol, Inc. to conduct its affairs in strict
compliance with the letter and spirit of the law and to adhere to the highest
principles of business ethics.  Accordingly, all officers, employees and
independent contractors must avoid activities which are in conflict, or give
the appearance of being in conflict, with these principles and with the
interests of the Company.  The following are potentially compromising
situations which must be avoided.  Any exceptions must be reported to the
President and written approval for continuation must be obtained.

         1.      Revealing confidential information to outsiders or misusing
confidential information.  Unauthorized divulging of information is a violation
of this policy whether or not for personal gain and whether or not harm to the
Company is intended.  (The Employment, Confidential Information and Invention
Assignment Agreement elaborates on this principle and is a binding agreement.)

         2.      Accepting or offering substantial gifts, excessive
entertainment, favors or payments which may be deemed to constitute undue
influence or otherwise be improper or embarrassing to the Company.

         3.      Participating in civic or professional organizations that
might involve divulging confidential information of the Company.

         4.      Initiating or approving personnel actions affecting reward or
punishment of employees or applicants where there is a family relationship or
is or appears to be a personal or social involvement.

         5.      Initiating or approving any form of personal or social
harassment of employees.

         6.      Investing or holding outside directorships in suppliers,
customers or competing companies, including financial speculation, where such
investment or directorship might influence in any manner a decision or course
of action of the Company.

         7.      Borrowing from or lending to employees, customers or
suppliers.

         8.      Acquiring real estate of interest to the Company.





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         9.      Improperly using or disclosing to the Company any proprietary
information or trade secrets of any former or concurrent employer or other
person or entity with whom obligations of confidentiality exist.

         10.     Unlawfully discussing prices, costs, customers, sales or
markets with competing companies or their employees.

         11.     Making any unlawful agreements with distributors with respect
to prices.

         12.     Improperly using or authorizing the use of any inventions
which are the subject of patent claims of any other person or entity.

         13.     Engaging in any conduct which is not in the best interest of
the Company.

         Each officer, employee and independent contractor must take every
necessary action to ensure compliance with these guidelines and to bring
problem areas to the attention of higher management for review.  Violations of
this conflict of interest policy may result in discharge without warning.