5ZCX:
reference: Structural and functional characterization of HIV-1 cell fusion inhibitor T20., Zhang X, Ding X, Zhu Y, Chong H, Cui S, He J, Wang X, He Y, AIDS. 2018 Aug 8. doi: 10.1097/QAD.0000000000001979. PMID: 30096076

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