2CGR:
reference: Local and transmitted conformational changes on complexation of an anti-sweetener Fab., Guddat LW, Shan L, Anchin JM, Linthicum DS, Edmundson AB, J Mol Biol 1994 Feb 11;236(1):247-74. PMID: 7893280

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