5UCN:
reference: Active site remodeling during the catalytic cycle in metal-dependent fructose-1,6-bisphosphate aldolases., Jacques B, Coincon M, Sygusch J, J Biol Chem. 2018 Mar 28. pii: RA117.001098. doi: 10.1074/jbc.RA117.001098. PMID: 29593097

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