Arthur Weiss, M.D., Ph.D., is a pioneer in cell biology and signal transduction. Dr. Weiss is a Howard Hughes Medical Institute Investigator and Ephraim P. Engleman Distinguished Professor, University of California San Francisco. He has previously served as the President of the American Association of Immunologists. He was also elected to the American Academy of Arts and Sciences, the National Academy of Sciences, and the Institute of Medicine. Dr. Weiss received his B.A. at the Johns Hopkins University and his M.D. and Ph.D. from the University of Chicago School of Medicine. He did postdoctoral training at the Swiss Institute for Experimental Cancer Research and his clinical training in internal medicine and rheumatology at UCSF.