5UIW:
reference: Structure of CC Chemokine Receptor 5 with a Potent Chemokine Antagonist Reveals Mechanisms of Chemokine Recognition and Molecular Mimicry by HIV., Zheng Y, Han GW, Abagyan R, Wu B, Stevens RC, Cherezov V, Kufareva I, Handel TM, Immunity. 2017 Jun 20;46(6):1005-1017.e5. doi: 10.1016/j.immuni.2017.05.002. PMID: 28636951

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