1N4G:
reference: Atomic structure of Mycobacterium tuberculosis CYP121 to 1.06 A reveals novel features of cytochrome P450., Leys D, Mowat CG, McLean KJ, Richmond A, Chapman SK, Walkinshaw MD, Munro AW, J Biol Chem 2003 Feb 14;278(7):5141-7. Epub 2002 Nov 14. PMID: 12435731

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