5I8T:
reference: Metal-Dependent Function of a Mammalian Acireductone Dioxygenase., Deshpande AR, Wagenpfeil K, Pochapsky TC, Petsko GA, Ringe D, Biochemistry. 2016 Mar 8;55(9):1398-407. doi: 10.1021/acs.biochem.5b01319. Epub, 2016 Feb 24. PMID: 26858196

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