1.2.1.41 glutamate-5-semialdehyde dehydrogenase L-ornithine biosynthesis II - 1.4.1.3 glutamate dehydrogenase [NAD(P)+] L-ornithine biosynthesis II - 2.6.1.13 ornithine aminotransferase L-ornithine biosynthesis II - 2.7.2.11 glutamate 5-kinase L-ornithine biosynthesis II -