Affiliation: | aDepartment of Infectious Diseases, St. Jude Children''s Research Hospital, Memphis, TN, 38105;;bDepartment of Structural Biology, St. Jude Children''s Research Hospital, Memphis, TN, 38105;;cDepartment of Chemical Biology and Therapeutics, St. Jude Children''s Research Hospital, Memphis, TN, 38105;;dBioscience Division, SRI International, Menlo Park, CA, 94025 |