5ZIS:
reference: Reconstitution of full-length P450BM3 with an artificial metal complex by utilising the transpeptidase Sortase A., Omura K, Aiba Y, Onoda H, Stanfield JK, Ariyasu S, Sugimoto H, Shiro Y, Shoji O, Watanabe Y, Chem Commun (Camb). 2018 Jul 12;54(57):7892-7895. doi: 10.1039/c8cc02760a. PMID: 29845154

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