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