4KTE:
reference: Vaccine-elicited primate antibodies use a distinct approach to the HIV-1 primary receptor binding site informing vaccine redesign., Tran K, Poulsen C, Guenaga J, de Val Alda N, Wilson R, Sundling C, Li Y, Stanfield RL, Wilson IA, Ward AB, Karlsson Hedestam GB, Wyatt RT, Proc Natl Acad Sci U S A. 2014 Feb 18;111(7):E738-47. doi:, 10.1073/pnas.1319512111. Epub 2014 Feb 3. PMID: 24550318

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).