Tom Klein has been appointed chief commercial officer at XOMA Corp. In this newly created position, he reports to chief executive officer John Varian. Mr. Klein has more than 25 years of successful brand commercialization leadership, with an expertise in commercializing biologics. Mr. Klein joins the company from Genentech, where he was vice president, business unit head of Virology and Specialty Care.   “We created an executive-level position for commercial operations for two reasons. Fir...