3HBX:
reference: A Common Structural Basis for pH- and Calmodulin-mediated Regulation in Plant Glutamate Decarboxylase., Gut H, Dominici P, Pilati S, Astegno A, Petoukhov MV, Svergun DI, Grutter MG, Capitani G, J Mol Biol. 2009 Jul 4. PMID: 19580813

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