Exhibit 23.5


                  CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We consent to the reference to our firm under the caption "Experts" in the
Registration Statement (Form S-4) and the related Prospectus of Hyseq, Inc. for
the registration of 46,602,586 shares of its common stock and to the inclusion
and incorporation by reference therein of our report dated February 2, 2000,
with respect to the consolidated statements of operations, stockholders' equity
and cash flows for the year ended December 31, 1999, included in its Annual
Report (Form 10-K) for the year ended December 31, 2001, filed with the
Securities and Exchange Commission.

                                         /s/ Ernst & Young LLP

Palo Alto, California
November 25, 2002