carbamoyl phosphate + L-ornithine <=> L-citrulline + phosphate + H(+)
carbamoyl phosphate + l-ornithine <=> l-citrulline + phosphate + h(+)
carbamoyl phosphate + L-ornithine <=> L-citrulline + phosphate + H(+)
carbamoyl phosphate + l-ornithine <=> l-citrulline + phosphate + h(+)