1RE9:
reference: Conformational states of cytochrome P450cam revealed by trapping of synthetic molecular wires., Hays AM, Dunn AR, Chiu R, Gray HB, Stout CD, Goodin DB, J Mol Biol. 2004 Nov 19;344(2):455-69. PMID: 15522298

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