4G0S:
reference: Ligand promiscuity within the internal cavity of Epiphyas postvittana Takeout 1 protein., Hamiaux C, Basten L, Greenwood DR, Baker EN, Newcomb RD, J Struct Biol. 2013 Apr 4. pii: S1047-8477(13)00084-1. doi:, 10.1016/j.jsb.2013.03.013. PMID: 23563188

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