4IAP:
reference: Structure of osh3 reveals a conserved mode of phosphoinositide binding in oxysterol-binding proteins., Tong J, Yang H, Yang H, Eom SH, Im YJ, Structure. 2013 Jul 2;21(7):1203-13. doi: 10.1016/j.str.2013.05.007. Epub 2013, Jun 20. PMID: 23791945

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