4NHC:
reference: Stapled HIV-1 peptides recapitulate antigenic structures and engage broadly neutralizing antibodies., Bird GH, Irimia A, Ofek G, Kwong PD, Wilson IA, Walensky LD, Nat Struct Mol Biol. 2014 Nov 24. doi: 10.1038/nsmb.2922. PMID: 25420104

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