2Y69:
reference: A combined quantum chemical and crystallographic study on the oxidized binuclear center of cytochrome c oxidase., Kaila VR, Oksanen E, Goldman A, Bloch DA, Verkhovsky MI, Sundholm D, Wikstrom M, Biochim Biophys Acta. 2011 Jan 4. PMID: 21211513

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