5XIB:
reference: Structures of the Heme Acquisition Protein HasA with Iron(III)-5,15-Diphenylporphyrin and Derivatives Thereof as an Artificial Prosthetic Group., Uehara H, Shisaka Y, Nishimura T, Sugimoto H, Shiro Y, Miyake Y, Shinokubo H, Watanabe Y, Shoji O, Angew Chem Int Ed Engl. 2017 Nov 27;56(48):15279-15283. doi:, 10.1002/anie.201707212. Epub 2017 Oct 9. PMID: 28921809

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