1UIO:
reference: Site-directed mutagenesis of histidine 238 in mouse adenosine deaminase: substitution of histidine 238 does not impede hydroxylate formation., Sideraki V, Wilson DK, Kurz LC, Quiocho FA, Rudolph FB, Biochemistry 1996 Nov 26;35(47):15019-28. PMID: 8942668

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