1OG2:
reference: Crystal structure of human cytochrome P450 2C9 with bound warfarin., Williams PA, Cosme J, Ward A, Angove HC, Matak Vinkovic D, Jhoti H, Nature 2003 Jul 24;424(6947):464-8. PMID: 12861225

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