D-Ornithine is an enantiomer of the non-proteinogenic amino acid L-ornithine .1 It can be converted to 2,4-diaminopentanoic acid by ornithine 4,5-aminomutase (4,5-OAM) in Clostridium.2
1.Wu, X.-Y., Guo, X.-Y., Zhang, B., et al.Recent advances of L-ornithine biosynthesis in metabolically engineered Corynebacterium glutamicumFront. Bioeng. Biotechnol.7440(2020) 2.Maity, A.N., Chen, Y.-H., and Ke, S.-C.Large-scale domain motions and pyridoxal-5'-phosphate assisted radical catalysis in coenzyme B12-dependent aminomutasesInt. J. Mol. Sci.12(2)3064-3087(2014)