2GQX:
reference: Structure-activity correlations in pentachlorobenzene oxidation by engineered cytochrome P450cam., Xu F, Bell SG, Rao Z, Wong LL, Protein Eng Des Sel. 2007 Oct;20(10):473-80. Epub 2007 Oct 24. PMID: 17962225

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