1KGA:
reference: Structure of 2-keto-3-deoxy-6-phosphogluconate aldolase at 2 . 8 A resolution., Mavridis IM, Hatada MH, Tulinsky A, Lebioda L, J Mol Biol 1982 Dec 5;162(2):419-44. PMID: 7161801

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