1. Department of Chemistry and
Biochemistry, University of Delaware, Newark,
Delaware 19716, United States
2. Pittsburgh Center for HIV Protein
Interactions, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, United States
3. Department of Chemistry, Bucknell University, Lewisburg, Pennsylvania 17837,
United States
4. Department
of Molecular, Microbial,
and Structural Biology, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, Connecticut
06030-3305, United States