3B8X:
reference: GDP-4-Keto-6-deoxy-D-mannose 3-Dehydratase, Accommodating a Sugar Substrate in the Active Site., Cook PD, Holden HM, J Biol Chem. 2008 Feb 15;283(7):4295-303. Epub 2007 Nov 28. PMID: 18045869

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