1HXP:
reference: Three-dimensional structure of galactose-1-phosphate uridylyltransferase from Escherichia coli at 1.8 A resolution., Wedekind JE, Frey PA, Rayment I, Biochemistry 1995 Sep 5;34(35):11049-61. PMID: 7669762

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