1OCC:
reference: The whole structure of the 13-subunit oxidized cytochrome c oxidase at 2.8 A., Tsukihara T, Aoyama H, Yamashita E, Tomizaki T, Yamaguchi H, Shinzawa-Itoh K, Nakashima R, Yaono R, Yoshikawa S, Science 1996 May 24;272(5265):1136-44. PMID: 8638158

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