. "The plant enzyme also catalyzes the reactions of EC 2.1.3.3, EC 2.1.3.6 and EC 2.7.2.2, thus functioning as a putrescine synthase, converting agmatine and ornithine into putrescine and citrulline, respectively." . . . "Agmatine deiminase" . "Agmatine + H(2)O = N-carbamoylputrescine + NH(3)." .