2WLA:
reference: Crystal structures of Streptococcus pyogenes Dpr reveal a dodecameric iron-binding protein with a ferroxidase site., Haikarainen T, Tsou CC, Wu JJ, Papageorgiou AC, J Biol Inorg Chem. 2009 Sep 2. PMID: 19727858

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