6CDZ:
reference: A Single Mutation Traps a Half-Sites Reactive Enzyme in Midstream, Explaining Asymmetry in Hydride Transfer., Finer-Moore JS, Lee TT, Stroud RM, Biochemistry. 2018 May 15;57(19):2786-2795. doi: 10.1021/acs.biochem.8b00176., Epub 2018 May 2. PMID: 29717875

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