1NAI:
reference: Crystal structures of the oxidized and reduced forms of UDP-galactose 4-epimerase isolated from Escherichia coli., Thoden JB, Frey PA, Holden HM, Biochemistry 1996 Feb 27;35(8):2557-66. PMID: 8611559

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