1YQC:
reference: Crystal structure of ureidoglycolate hydrolase (AllA) from Escherichia coli O157:H7., Raymond S, Tocilj A, Ajamian E, Li Y, Hung MN, Matte A, Cygler M, Proteins 2005 Nov 1;61(2):454-9. PMID: 16114032

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