2VOU:
reference: Structure of 2,6-dihydroxypyridine 3-hydroxylase from a nicotine-degrading pathway., Treiber N, Schulz GE, J Mol Biol. 2008 May 23;379(1):94-104. Epub 2008 Mar 26. PMID: 18440023

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