2C31:
reference: Structural basis for activation of the thiamin diphosphate-dependent enzyme oxalyl-CoA decarboxylase by adenosine diphosphate., Berthold CL, Moussatche P, Richards NG, Lindqvist Y, J Biol Chem. 2005 Dec 16;280(50):41645-54. Epub 2005 Oct 10. PMID: 16216870

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