1DTI:
reference: Waterproofing the heme pocket. Role of proximal amino acid side chains in preventing hemin loss from myoglobin., Liong EC, Dou Y, Scott EE, Olson JS, Phillips GN Jr, J Biol Chem 2001 Mar 23;276(12):9093-100. PMID: 11084036

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