4.3.1.12 L-ornithine - 4.3.1.12 additional information - 4.3.1.12 additional information enzyme catalyzes the last step in the pathway leading from nopaline or octopine through L-arginine and L-ornithine to L-proline 4.3.1.12 additional information ORFC gene product from strain GR4 shows similarity with OCD of Agrobacterium tumefaciens