BERKELEY, Calif., March 4, 2008 (PRIME NEWSWIRE) -- XOMA Ltd. (Nasdaq:XOMA), a leader in the discovery and development of antibody therapeutics, announced that the Company will host a conference call and webcast on Tuesday, March 11, 2008 at 4:30 p.m. Eastern time to discuss 2007 financial results and provide a general business update.