1P3V:
reference: Crystal structures of the NO- and CO-bound heme oxygenase from Neisseriae meningitidis. Implications for O2 activation., Friedman J, Lad L, Deshmukh R, Li H, Wilks A, Poulos TL, J Biol Chem 2003 Sep 5;278(36):34654-9. Epub 2003 Jun 22. PMID: 12819228

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