4CC8:
reference: Prefusion structure of trimeric HIV-1 envelope glycoprotein determined by cryo-electron microscopy., Bartesaghi A, Merk A, Borgnia MJ, Milne JL, Subramaniam S, Nat Struct Mol Biol. 2013 Oct 23. doi: 10.1038/nsmb.2711. PMID: 24154805

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