1LKC:
reference: Three-dimensional structure of the L-threonine-O-3-phosphate decarboxylase (CobD) enzyme from Salmonella enterica., Cheong CG, Bauer CB, Brushaber KR, Escalante-Semerena JC, Rayment I, Biochemistry. 2002 Apr 16;41(15):4798-808. PMID: 11939774

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