2CDY:
reference: Structure of the manganese superoxide dismutase from Deinococcus radiodurans in two crystal forms., Dennis RJ, Micossi E, McCarthy J, Moe E, Gordon EJ, Kozielski-Stuhrmann S, Leonard GA, McSweeney S, Acta Crystallograph Sect F Struct Biol Cryst Commun. 2006 Apr 1;62(Pt, 4):325-9. Epub 2006 Mar 25. PMID: 16582477

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