1. Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
2. Yerkes National Primate Research Center, Emory University, Atlanta, Georgia 30329, United States
3. Emory Vaccine Center, Emory University, Atlanta, Georgia 30322, United States
4. Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia 30322, United States
5. HIV Pathogenesis Research Unit, Department of Molecular Medicine and Haematology, University of the Witwatersrand, Johannesburg, Gauteng 2193, South Africa