[1] NCI, Ctr Struct Biol, Prot Nucl Acid Interact Sect, Frederick, MD 21702 USA
[2] Natl Inst Diabet & Digest & Kidney Dis, NIH, Computat Biomol Magnet Resonance Core, Bethesda, MD 20892 USA
[3] Small Angle Xray Scattering Core Facil, NIH, Natl Canc Inst, Basic Sci Program,Frederick Natl Lab Canc Res, Frederick, MD 21702 USA
[4] NCI, Ctr Struct Biol, Biophys Resource, Frederick, MD 21702 USA
[5] NCI, Computat Struct Biol Sect, Frederick Natl Lab Canc Res Lab Canc Immunometab, Frederick, MD 21702 USA
[6] NCI, HIV Dynam & Replicat Program, Retrovirus Assembly Sect, Frederick, MD 21702 USA
[7] Natl Inst Diabet & Digest & Kidney Dis, Lab Mol Biol, Bethesda, MD 20892 USA