<PAGE> 1
EXHIBIT 24
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that in connection with the proposed
registration by CombiMatrix Corporation, a Delaware corporation (the "Company"),
of the initial public offering of shares of its common stock, $0.001 par value
per share (the "Shares"), and the registration of any Shares as may be offered
pursuant to Rule 462 under the Securities Act of 1933, as amended, the
undersigned officer or director of the Company hereby constitutes and appoints
Patrick D. de Maynadier and Stephen Burke and each of them (with full power to
each of them to act alone), the undersigned's true and lawful attorney-in-fact
and agent, for the undersigned and on the undersigned's behalf and in the
undersigned's name, place and stead, in any and all capacities, to sign, execute
and file a registration statement relating to such securities to be filed with
the Securities and Exchange Commission on such Form as, in the opinion of
counsel for the Company, is appropriate, together with all amendments thereto
(including any post-effective amendments), with all exhibits and any and all
documents required to be filed with respect thereto with any regulatory
authority, granting unto said attorneys, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary
to be done in and about the premises in order to effectuate the same as fully to
all intents and purposes as the undersigned might or could do if personally
present, hereby ratifying and confirming all of the said attorneys-in-fact and
agents, or either of them, may lawfully do or cause to be done by virtue
thereof.
IN WITNESS WHEREOF, the undersigned has hereto signed this power of
attorney this 14th day of November, 2000.
/s/ PATRICK A. QUARLES
---------------------------------------
Patrick A. Quarles
<PAGE> 2
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that in connection with the proposed
registration by CombiMatrix Corporation, a Delaware corporation (the "Company"),
of the initial public offering of shares of its common stock, $0.001 par value
per share (the "Shares"), and the registration of any Shares as may be offered
pursuant to Rule 462 under the Securities Act of 1933, as amended, the
undersigned officer or director of the Company hereby constitutes and appoints
Patrick D. de Maynadier and Stephen Burke and each of them (with full power to
each of them to act alone), the undersigned's true and lawful attorney-in-fact
and agent, for the undersigned and on the undersigned's behalf and in the
undersigned's name, place and stead, in any and all capacities, to sign, execute
and file a registration statement relating to such securities to be filed with
the Securities and Exchange Commission on such Form as, in the opinion of
counsel for the Company, is appropriate, together with all amendments thereto
(including any post-effective amendments), with all exhibits and any and all
documents required to be filed with respect thereto with any regulatory
authority, granting unto said attorneys, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary
to be done in and about the premises in order to effectuate the same as fully to
all intents and purposes as the undersigned might or could do if personally
present, hereby ratifying and confirming all of the said attorneys-in-fact and
agents, or either of them, may lawfully do or cause to be done by virtue
thereof.
IN WITNESS WHEREOF, the undersigned has hereto signed this power of
attorney this 14th day of November, 2000.
/s/ RIGDON CURRIE
---------------------------------------
Rigdon Currie
<PAGE> 3
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that in connection with the proposed
registration by CombiMatrix Corporation, a Delaware corporation (the "Company"),
of the initial public offering of shares of its common stock, $0.001 par value
per share (the "Shares"), and the registration of any Shares as may be offered
pursuant to Rule 462 under the Securities Act of 1933, as amended, the
undersigned officer or director of the Company hereby constitutes and appoints
Patrick D. de Maynadier and Stephen Burke and each of them (with full power to
each of them to act alone), the undersigned's true and lawful attorney-in-fact
and agent, for the undersigned and on the undersigned's behalf and in the
undersigned's name, place and stead, in any and all capacities, to sign, execute
and file a registration statement relating to such securities to be filed with
the Securities and Exchange Commission on such Form as, in the opinion of
counsel for the Company, is appropriate, together with all amendments thereto
(including any post-effective amendments), with all exhibits and any and all
documents required to be filed with respect thereto with any regulatory
authority, granting unto said attorneys, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary
to be done in and about the premises in order to effectuate the same as fully to
all intents and purposes as the undersigned might or could do if personally
present, hereby ratifying and confirming all of the said attorneys-in-fact and
agents, or either of them, may lawfully do or cause to be done by virtue
thereof.
IN WITNESS WHEREOF, the undersigned has hereto signed this power of
attorney this 14th day of November, 2000.
/s/ ROBERT L. HARRIS II
---------------------------------------
Robert L. Harris II
<PAGE> 4
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that in connection with the proposed
registration by CombiMatrix Corporation, a Delaware corporation (the "Company"),
of the initial public offering of shares of its common stock, $0.001 par value
per share (the "Shares"), and the registration of any Shares as may be offered
pursuant to Rule 462 under the Securities Act of 1933, as amended, the
undersigned officer or director of the Company hereby constitutes and appoints
Patrick D. de Maynadier and Stephen Burke and each of them (with full power to
each of them to act alone), the undersigned's true and lawful attorney-in-fact
and agent, for the undersigned and on the undersigned's behalf and in the
undersigned's name, place and stead, in any and all capacities, to sign, execute
and file a registration statement relating to such securities to be filed with
the Securities and Exchange Commission on such Form as, in the opinion of
counsel for the Company, is appropriate, together with all amendments thereto
(including any post-effective amendments), with all exhibits and any and all
documents required to be filed with respect thereto with any regulatory
authority, granting unto said attorneys, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary
to be done in and about the premises in order to effectuate the same as fully to
all intents and purposes as the undersigned might or could do if personally
present, hereby ratifying and confirming all of the said attorneys-in-fact and
agents, or either of them, may lawfully do or cause to be done by virtue
thereof.
IN WITNESS WHEREOF, the undersigned has hereto signed this power of
attorney this 14th day of November, 2000.
/s/ AMIT KUMAR, PH.D.
---------------------------------------
Amit Kumar, Ph.D.
<PAGE> 5
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that in connection with the proposed
registration by CombiMatrix Corporation, a Delaware corporation (the "Company"),
of the initial public offering of shares of its common stock, $0.001 par value
per share (the "Shares"), and the registration of any Shares as may be offered
pursuant to Rule 462 under the Securities Act of 1933, as amended, the
undersigned officer or director of the Company hereby constitutes and appoints
Patrick D. de Maynadier and Stephen Burke and each of them (with full power to
each of them to act alone), the undersigned's true and lawful attorney-in-fact
and agent, for the undersigned and on the undersigned's behalf and in the
undersigned's name, place and stead, in any and all capacities, to sign, execute
and file a registration statement relating to such securities to be filed with
the Securities and Exchange Commission on such Form as, in the opinion of
counsel for the Company, is appropriate, together with all amendments thereto
(including any post-effective amendments), with all exhibits and any and all
documents required to be filed with respect thereto with any regulatory
authority, granting unto said attorneys, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary
to be done in and about the premises in order to effectuate the same as fully to
all intents and purposes as the undersigned might or could do if personally
present, hereby ratifying and confirming all of the said attorneys-in-fact and
agents, or either of them, may lawfully do or cause to be done by virtue
thereof.
IN WITNESS WHEREOF, the undersigned has hereto signed this power of
attorney this 14th day of November, 2000.
/s/ DONALD D. MONTGOMERY, PH.D.
---------------------------------------
Donald D. Montgomery, Ph.D.
<PAGE> 6
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that in connection with the proposed
registration by CombiMatrix Corporation, a Delaware corporation (the "Company"),
of the initial public offering of shares of its common stock, $0.001 par value
per share (the "Shares"), and the registration of any Shares as may be offered
pursuant to Rule 462 under the Securities Act of 1933, as amended, the
undersigned officer or director of the Company hereby constitutes and appoints
Patrick D. de Maynadier and Stephen Burke and each of them (with full power to
each of them to act alone), the undersigned's true and lawful attorney-in-fact
and agent, for the undersigned and on the undersigned's behalf and in the
undersigned's name, place and stead, in any and all capacities, to sign, execute
and file a registration statement relating to such securities to be filed with
the Securities and Exchange Commission on such Form as, in the opinion of
counsel for the Company, is appropriate, together with all amendments thereto
(including any post-effective amendments), with all exhibits and any and all
documents required to be filed with respect thereto with any regulatory
authority, granting unto said attorneys, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary
to be done in and about the premises in order to effectuate the same as fully to
all intents and purposes as the undersigned might or could do if personally
present, hereby ratifying and confirming all of the said attorneys-in-fact and
agents, or either of them, may lawfully do or cause to be done by virtue
thereof.
IN WITNESS WHEREOF, the undersigned has hereto signed this power of
attorney this 14th day of November, 2000.
/s/ ROBERTO P. ROSENKRANZ, PH.D.
---------------------------------------
Roberto P. Rosenkranz, Ph.D.
<PAGE> 7
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that in connection with the proposed
registration by CombiMatrix Corporation, a Delaware corporation (the "Company"),
of the initial public offering of shares of its common stock, $0.001 par value
per share (the "Shares"), and the registration of any Shares as may be offered
pursuant to Rule 462 under the Securities Act of 1933, as amended, the
undersigned officer or director of the Company hereby constitutes and appoints
Patrick D. de Maynadier and Stephen Burke and each of them (with full power to
each of them to act alone), the undersigned's true and lawful attorney-in-fact
and agent, for the undersigned and on the undersigned's behalf and in the
undersigned's name, place and stead, in any and all capacities, to sign, execute
and file a registration statement relating to such securities to be filed with
the Securities and Exchange Commission on such Form as, in the opinion of
counsel for the Company, is appropriate, together with all amendments thereto
(including any post-effective amendments), with all exhibits and any and all
documents required to be filed with respect thereto with any regulatory
authority, granting unto said attorneys, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary
to be done in and about the premises in order to effectuate the same as fully to
all intents and purposes as the undersigned might or could do if personally
present, hereby ratifying and confirming all of the said attorneys-in-fact and
agents, or either of them, may lawfully do or cause to be done by virtue
thereof.
IN WITNESS WHEREOF, the undersigned has hereto signed this power of
attorney this 14th day of November, 2000.
/s/ PAUL R. RYAN
---------------------------------------
Paul R. Ryan
