3UA1:
reference: Structural and mechanistic insights into the interaction of cytochrome P4503A4 with Bromoergocryptine, a type I ligand., Sevrioukova IF, Poulos TL, J Biol Chem. 2011 Dec 7. PMID: 22157006

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