4AAY:
reference: The respiratory arsenite oxidase: structure and the role of residues surrounding the rieske cluster., Warelow TP, Oke M, Schoepp-Cothenet B, Dahl JU, Bruselat N, Sivalingam GN, Leimkuhler S, Thalassinos K, Kappler U, Naismith JH, Santini JM, PLoS One. 2013 Aug 30;8(8):e72535. doi: 10.1371/journal.pone.0072535. PMID: 24023621

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