2PAJ:
reference: Discovery and structure determination of the orphan enzyme isoxanthopterin deaminase ., Hall RS, Agarwal R, Hitchcock D, Sauder JM, Burley SK, Swaminathan S, Raushel FM, Biochemistry. 2010 May 25;49(20):4374-82. PMID: 20415463

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