3TOG:
reference: Developing HIV-1 Protease Inhibitors through Stereospecific Reactions in Protein Crystals., Olajuyigbe FM, Demitri N, De Zorzi R, Geremia S, Molecules. 2016 Oct 31;21(11). pii: molecules21111458. doi:, 10.3390/molecules21111458. PMID: 27809253

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