1IPF:
reference: Capturing Enzyme Structure Prior to Reaction Initiation: Tropinone Reductase-II-Substrate Complexes., Yamashita A, Endo M, Higashi T, Nakatsu T, Yamada Y, Oda J, Kato H, Biochemistry 2003 May 20;42(19):5566-5573. PMID: 12741812

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