3LZV:
reference: The Effect of Clade Specific Sequence Polymorphisms on HIV-1 Protease Activity and Inhibitor Resistance Pathways., Bandaranayake RM, Kolli M, King NM, Nalivaika E, Heroux A, Kakizawa J, Sugiura W, Schiffer CA, J Virol. 2010 Jul 21. PMID: 20660190

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