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