label: N(5)-(D-ornithyl)-[N(5)-(D-ornithyl)]n-1 + n AMP + n diphosphate + n H(+) => n D-ornithine + n ATP + H2O
label_lc: n(5)-(d-ornithyl)-[n(5)-(d-ornithyl)]n-1 + n amp + n diphosphate + n h(+) => n d-ornithine + n atp + h2o