EXHIBIT 23.2


          [LETTERHEAD OF MARSHALL, O'TOOLE, GERSTEIN, MURRAY & BORUN]



                               September 24, 1996


Board of Directors
XOMA Corporation
2910 Seventh Street
Berkeley, CA 94710

                    Re:  Registration Statement on Form S-3

Gentlemen:

            Marshall, O'Toole, Gerstein, Murray & Borun hereby con-
sents to the disclosure of our relationship as patent counsel to
XOMA Corporation (the "Company") in the Company's Registration
Statement on Form S-3 (the "Registration Statement"), and in par-
ticular the references to us under the headings "Risk Factors - No
Assurance of Patent Protection/Avoidance of Patent Infringement"
and "Legal Opinions," and to the filing of this consent as an
exhibit to the Registration Statement.

                                    Very truly yours,



                                    Marshall, O'Toole, Gerstein,
                                      Murray & Borun