A ureahydrolase that catalyzes the hydrolysis of arginine or canavanine to yield L-ornithine (ORNITHINE) and urea. Deficiency of this enzyme causes HYPERARGININEMIA. EC 3.5.3.1.

Synonyms: Protein, Liver-Derived Inhibitory, Inhibitor, Hepatic Proliferation, Proliferation Inhibitor, Hepatic, Liver-Derived Lymphocyte Proliferation Inhibiting Protein, Arginase, Protein, Liver Immunoregulatory, Liver-Derived Inhibitory Protein, Liver Immunoregulatory Protein, 0, Liver Derived Lymphocyte Proliferation Inhibiting Protein, Liver Derived Inhibitory Protein, EC 3.5.3.1, Immunoregulatory Protein, Liver, Arginase A1, L-Arginine amidinohydrolase, Arginase A4, Inhibitory Protein, Liver-Derived, Hepatic Proliferation Inhibitor