carbamoyl phosphate + putrescine <=> N-carbamoylputrescine + phosphate + H(+)
carbamoyl phosphate + putrescine <=> n-carbamoylputrescine + phosphate + h(+)
carbamoyl phosphate + putrescine <=> N-carbamoylputrescine + phosphate + H(+)
carbamoyl phosphate + putrescine <=> n-carbamoylputrescine + phosphate + h(+)