1. HIV Dynamics and Replication Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland, USA
2. Department of Chemistry, U.S. Naval Academy, Annapolis, Maryland, USA
3. NCI Small Angle X-ray Scattering Core Facility, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc., Frederick, Maryland, USA
4. Structural Biophysics Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland, USA