<PAGE>
                                  EXHIBIT 24


                               POWER OF ATTORNEY



          KNOW ALL MEN BY THESE PRESENTS that the person whose signature
appears below constitutes and appoints ADOLPH J. FERRO, Ph.D., GILBERT N.
MILLER, and each of them his true and lawful attorneys-in-fact and agents,
with full power of substitution and resubstitution for him and in his name,
place, and stead, in any and all capacities, to sign the Annual Report on Form
10-K of Epitope, Inc., for its fiscal year ended September 30, 1996, and any
and all amendments to the report and to file the same, with all exhibits
thereto, and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto said attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and
thing requisite and necessary to be done, as fully to all intents and purposes
as he might or could do in person, hereby ratifying and confirming all that
said attorneys-in-fact and agents or each of them or their or his substitute
or substitutes may lawfully do or cause to be done by virtue hereof.

          IN WITNESS WHEREOF, this power of attorney has been signed by the
following person in the capacity indicated effective as of November 5, 1996.


          Name                                      Title



-------------------------------------         Director
Roger L. Pringle
<PAGE>
                               POWER OF ATTORNEY

          KNOW ALL MEN BY THESE PRESENTS that the person whose signature
appears below constitutes and appoints ADOLPH J. FERRO, Ph.D., GILBERT N.
MILLER, and each of them his true and lawful attorneys-in-fact and agents,
with full power of substitution and resubstitution for him and in his name,
place, and stead, in any and all capacities, to sign the Annual Report on Form
10-K of Epitope, Inc., for its fiscal year ended September 30, 1996, and any
and all amendments to the report and to file the same, with all exhibits
thereto, and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto said attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and
thing requisite and necessary to be done, as fully to all intents and purposes
as he might or could do in person, hereby ratifying and confirming all that
said attorneys-in-fact and agents or each of them or their or his substitute
or substitutes may lawfully do or cause to be done by virtue hereof.

          IN WITNESS WHEREOF, this power of attorney has been signed by the
following person in the capacity indicated effective as of November 5, 1996.


          Name                                      Title



--------------------------------------        Director
W. Charles Armstrong
<PAGE>
                               POWER OF ATTORNEY

          KNOW ALL MEN BY THESE PRESENTS that the person whose signature
appears below constitutes and appoints ADOLPH J. FERRO, Ph.D., GILBERT N.
MILLER, and each of them his true and lawful attorneys-in-fact and agents,
with full power of substitution and resubstitution for him and in his name,
place, and stead, in any and all capacities, to sign the Annual Report on Form
10-K of Epitope, Inc., for its fiscal year ended September 30, 1996, and any
and all amendments to the report and to file the same, with all exhibits
thereto, and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto said attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and
thing requisite and necessary to be done, as fully to all intents and purposes
as he might or could do in person, hereby ratifying and confirming all that
said attorneys-in-fact and agents or each of them or their or his substitute
or substitutes may lawfully do or cause to be done by virtue hereof.

          IN WITNESS WHEREOF, this power of attorney has been signed by the
following person in the capacity indicated effective as of November 5, 1996.


          Name                                      Title



-------------------------------------         Director
Richard K. Donohue

<PAGE>
                               POWER OF ATTORNEY

          KNOW ALL MEN BY THESE PRESENTS that the person whose signature
appears below constitutes and appoints ADOLPH J. FERRO, Ph.D., GILBERT N.
MILLER, and each of them his true and lawful attorneys-in-fact and agents,
with full power of substitution and resubstitution for him and in his name,
place, and stead, in any and all capacities, to sign the Annual Report on Form
10-K of Epitope, Inc., for its fiscal year ended September 30, 1996, and any
and all amendments to the report and to file the same, with all exhibits
thereto, and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto said attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and
thing requisite and necessary to be done, as fully to all intents and purposes
as he might or could do in person, hereby ratifying and confirming all that
said attorneys-in-fact and agents or each of them or their or his substitute
or substitutes may lawfully do or cause to be done by virtue hereof.

          IN WITNESS WHEREOF, this power of attorney has been signed by the
following person in the capacity indicated effective as of November 5, 1996.


          Name                                      Title



-------------------------------------         Director
Margaret H. Jordan
<PAGE>
                               POWER OF ATTORNEY

          KNOW ALL MEN BY THESE PRESENTS that the person whose signature
appears below constitutes and appoints ADOLPH J. FERRO, Ph.D., GILBERT N.
MILLER, and each of them his true and lawful attorneys-in-fact and agents,
with full power of substitution and resubstitution for him and in his name,
place, and stead, in any and all capacities, to sign the Annual Report on Form
10-K of Epitope, Inc., for its fiscal year ended September 30, 1996, and any
and all amendments to the report and to file the same, with all exhibits
thereto, and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto said attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and
thing requisite and necessary to be done, as fully to all intents and purposes
as he might or could do in person, hereby ratifying and confirming all that
said attorneys-in-fact and agents or each of them or their or his substitute
or substitutes may lawfully do or cause to be done by virtue hereof.

          IN WITNESS WHEREOF, this power of attorney has been signed by the
following person in the capacity indicated effective as of November 5, 1996.


          Name                                      Title



--------------------------------------        Director
R. Douglas Norby
<PAGE>
                               POWER OF ATTORNEY

          KNOW ALL MEN BY THESE PRESENTS that the person whose signature
appears below constitutes and appoints ADOLPH J. FERRO, Ph.D., GILBERT N.
MILLER, and each of them his true and lawful attorneys-in-fact and agents,
with full power of substitution and resubstitution for him and in his name,
place, and stead, in any and all capacities, to sign the Annual Report on Form
10-K of Epitope, Inc., for its fiscal year ended September 30, 1996, and any
and all amendments to the report and to file the same, with all exhibits
thereto, and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto said attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and
thing requisite and necessary to be done, as fully to all intents and purposes
as he might or could do in person, hereby ratifying and confirming all that
said attorneys-in-fact and agents or each of them or their or his substitute
or substitutes may lawfully do or cause to be done by virtue hereof.

          IN WITNESS WHEREOF, this power of attorney has been signed by the
following person in the capacity indicated effective as of November 5, 1996.


          Name                                      Title



--------------------------------------        Director
Michael J. Paxton
<PAGE>
                               POWER OF ATTORNEY

          KNOW ALL MEN BY THESE PRESENTS that the person whose signature
appears below constitutes and appoints ADOLPH J. FERRO, Ph.D., GILBERT N.
MILLER, and each of them his true and lawful attorneys-in-fact and agents,
with full power of substitution and resubstitution for him and in his name,
place, and stead, in any and all capacities, to sign the Annual Report on Form
10-K of Epitope, Inc., for its fiscal year ended September 30, 1996, and any
and all amendments to the report and to file the same, with all exhibits
thereto, and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto said attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and
thing requisite and necessary to be done, as fully to all intents and purposes
as he might or could do in person, hereby ratifying and confirming all that
said attorneys-in-fact and agents or each of them or their or his substitute
or substitutes may lawfully do or cause to be done by virtue hereof.

          IN WITNESS WHEREOF, this power of attorney has been signed by the
following person in the capacity indicated effective as of November 5, 1996.


          Name                                      Title



--------------------------------------        Director
G. Patrick Sheaffer
<PAGE>
                               POWER OF ATTORNEY

          KNOW ALL MEN BY THESE PRESENTS that the person whose signature
appears below constitutes and appoints ADOLPH J. FERRO, Ph.D., GILBERT N.
MILLER, and each of them his true and lawful attorneys-in-fact and agents,
with full power of substitution and resubstitution for him and in his name,
place, and stead, in any and all capacities, to sign the Annual Report on Form
10-K of Epitope, Inc., for its fiscal year ended September 30, 1996, and any
and all amendments to the report and to file the same, with all exhibits
thereto, and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto said attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and
thing requisite and necessary to be done, as fully to all intents and purposes
as he might or could do in person, hereby ratifying and confirming all that
said attorneys-in-fact and agents or each of them or their or his substitute
or substitutes may lawfully do or cause to be done by virtue hereof.

          IN WITNESS WHEREOF, this power of attorney has been signed by the
following person in the capacity indicated effective as of December 23, 1996.


          Name                                Title



-------------------------------------   Controller
Mark V. Allred                          (Principal accounting officer)
<PAGE>
                               POWER OF ATTORNEY


          KNOW ALL MEN BY THESE PRESENTS that the person whose signature
appears below constitutes and appoints ADOLPH J. FERRO, Ph.D., GILBERT N.
MILLER, and each of them his true and lawful attorneys-in-fact and agents,
with full power of substitution and resubstitution for him and in his name,
place, and stead, in any and all capacities, to sign the Annual Report on Form
10-K of Epitope, Inc., for its fiscal year ended September 30, 1996, and any
and all amendments to the report and to file the same, with all exhibits
thereto, and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto said attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and
thing requisite and necessary to be done, as fully to all intents and purposes
as he might or could do in person, hereby ratifying and confirming all that
said attorneys-in-fact and agents or each of them or their or his substitute
or substitutes may lawfully do or cause to be done by virtue hereof.

          IN WITNESS WHEREOF, this power of attorney has been signed by the
following person in the capacity indicated effective as of November 5, 1996.



          Name                                Title



--------------------------------- President, Chief Executive
Adolph J. Ferro, Ph.D.                  Officer, and Director
                                  (Principal executive officer)



--------------------------------- Executive Vice-President,
Gilbert N. Miller                       Chief Financial Officer, and        
Treasurer
                                  (Principal financial officer)



--------------------------------- Director
Andrew S. Goldstein