3LGN:
reference: The IsdG-family of haem oxygenases degrades haem to a novel chromophore., Reniere ML, Ukpabi GN, Harry SR, Stec DF, Krull R, Wright DW, Bachmann BO, Murphy ME, Skaar EP, Mol Microbiol. 2010 Feb 17. PMID: 20180905

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