4B2Z:
reference: Interactome map uncovers phosphatidylserine transport by oxysterol-binding proteins., Maeda K, Anand K, Chiapparino A, Kumar A, Poletto M, Kaksonen M, Gavin AC, Nature. 2013 Aug 11. doi: 10.1038/nature12430. PMID: 23934110

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