2MHR:
reference: Structure of myohemerythrin in the azidomet state at 1.7/1.3 A resolution., Sheriff S, Hendrickson WA, Smith JL, J Mol Biol 1987 Sep 20;197(2):273-96. PMID: 3681996

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