5DGD:
reference: Mechanism-based inactivation of benzoylformate decarboxylase, a thiamin diphosphate-dependent enzyme., Bera AK, Polovnikova LS, Roestamadji J, Widlanski TS, Kenyon GL, McLeish MJ, Hasson MS, J Am Chem Soc. 2007 Apr 11;129(14):4120-1. Epub 2007 Mar 17. PMID: 17367138

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