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