1. Graduate Programs in Biomolecular Structure and Design and Molecular and Cellular Biology, University of Washington and the Fred Hutchinson Cancer Research Center, Division of Basic Sciences, 1100 Fairview Avenue North, Mailstop A3-023, Seattle, Washington 98109, and Department of Medicinal Chemistry and Pharmacognosy and the Center for Pharmaceutical Biotechnology, University of Illinois at Chicago (MC 870), MBRB Room 3070, 900 South Ashland Avenue, Chicago, Illinois 60607