1. Department of Pharmacology, Medical Scientist Training Program, The Johns Hopkins Clinical Compound Screening Initiative, The Sidney Kimmel Comprehensive Cancer Center, and Solomon H. Snyder Department of Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, and W. Harry Feinstone Department of Molecular Microbiology and Immunology, The Malaria Research Institute, Bloomberg School of Public Health, The Johns Hopkins School of Public Health, Baltimore, Maryland 21205