1DOS:
reference: Novel active site in Escherichia coli fructose 1,6-bisphosphate aldolase., Blom NS, Tetreault S, Coulombe R, Sygusch J, Nat Struct Biol 1996 Oct;3(10):856-62. PMID: 8836102

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