1C1H:
reference: Structural and mechanistic basis of porphyrin metallation by ferrochelatase., Lecerof D, Fodje M, Hansson A, Hansson M, Al-Karadaghi S, J Mol Biol 2000 Mar 17;297(1):221-32. PMID: 10704318

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