6FYJ:
reference: Structural and catalytic properties of the peroxygenase P450 enzyme CYP152K6 from Bacillus methanolicus., Girvan HM, Poddar H, McLean KJ, Nelson DR, Hollywood KA, Levy CW, Leys D, Munro AW, J Inorg Biochem. 2018 Aug 3;188:18-28. doi: 10.1016/j.jinorgbio.2018.08.002. PMID: 30119014

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