2P4H:
reference: Crystal Structure of Vestitone Reductase from Alfalfa (Medicago sativa L.)., Shao H, Dixon RA, Wang X, J Mol Biol. 2007 May 25;369(1):265-76. Epub 2007 Mar 21. PMID: 17433362

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