1SUO:
reference: Structure of mammalian cytochrome P450 2B4 complexed with 4-(4-chlorophenyl)imidazole at 1.9-A resolution: insight into the range of P450 conformations and the coordination of redox partner binding., Scott EE, White MA, He YA, Johnson EF, Stout CD, Halpert JR, J Biol Chem 2004 Jun 25;279(26):27294-301. Epub 2004 Apr 20. PMID: 15100217

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