1FDY:
reference: Structure and mechanism of a sub-family of enzymes related to N-acetylneuraminate lyase., Lawrence MC, Barbosa JA, Smith BJ, Hall NE, Pilling PA, Ooi HC, Marcuccio SM, J Mol Biol 1997 Feb 21;266(2):381-99. PMID: 9047371

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