Histidinol-phosphatase <p> This entry describes a histidinol phosphatase domain. This domain occurs in bifunctional proteins at the N-terminal region, followed by an imidazoleglycerol-phosphate dehydratase domain (<db_xref db="INTERPRO" dbkey="IPR000807"/>). These enzymatic domains catalyze theninth and seventh steps, respectively, of histidine biosynthesis.</p>