BERKELEY, Calif., Nov. 6, 2006 (PRIMEZONE) -- XOMA Ltd. (Nasdaq:XOMA) today announced that its cGMP pharmaceutical manufacturing facilities have received Investigational Medicinal Products certification from the Medicines and Healthcare Products Regulatory Agency (MHRA) of the United Kingdom. The MHRA certification approves XOMA’s manufacturing facilities for the production of biological investigational medicinal products to be used in clinical trials in the European Union.