5JAC:
reference: Ferroxidase Activity in Eukaryotic Ferritin is Controlled by Accessory-Iron-Binding Sites in the Catalytic Cavity., Bernacchioni C, Pozzi C, Di Pisa F, Mangani S, Turano P, Chemistry. 2016 Sep 21. doi: 10.1002/chem.201602842. PMID: 27650996

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