1. Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
2. NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20895, USA.
3. Departments of Microbiology and Immunology and of Medicine, Columbia University Medical Center, New York, NY 10032, USA.