2UDP:
reference: High-resolution X-ray structure of UDP-galactose 4-epimerase complexed with UDP-phenol., Thoden JB, Frey PA, Holden HM, Protein Sci 1996 Nov;5(11):2149-61. PMID: 8931134

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