1CMT:
reference: The role of aspartate-235 in the binding of cations to an artificial cavity at the radical site of cytochrome c peroxidase., Fitzgerald MM, Trester ML, Jensen GM, McRee DE, Goodin DB, Protein Sci 1995 Sep;4(9):1844-50. PMID: 8528082

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