6NBL:
reference: Ligand and Redox Partner Binding Generates a New Conformational State in Cytochrome P450cam (CYP101A1)., Follmer AH, Tripathi S, Poulos TL, J Am Chem Soc. 2019 Feb 13;141(6):2678-2683. doi: 10.1021/jacs.8b13079. Epub 2019, Jan 31. PMID: 30672701

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