1CYX:
reference: Crystal structure of the membrane-exposed domain from a respiratory quinol oxidase complex with an engineered dinuclear copper center., Wilmanns M, Lappalainen P, Kelly M, Sauer-Eriksson E, Saraste M, Proc Natl Acad Sci U S A 1995 Dec 19;92(26):11955-9. PMID: 8618822

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