3ZPH:
reference: Enzymatic Conversion of Flavonoids using Bacterial Chalcone Isomerase and Enoate Reductase., Gall M, Thomsen M, Peters C, Pavlidis IV, Jonczyk P, Grunert PP, Beutel S, Scheper T, Gross E, Backes M, Geissler T, Ley JP, Hilmer JM, Krammer G, Palm GJ, Hinrichs W, Bornscheuer UT, Angew Chem Int Ed Engl. 2014 Jan 27;53(5):1439-42. doi: 10.1002/anie.201306952., Epub 2013 Dec 20. PMID: 24459060

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