has role ornithine ornithine 2,5-Diaminopentanoic acid KNApSAcK:C00001384 An alpha-amino acid that is pentanoic acid bearing two amino substituents at positions 2 and 5. 2,5-Diaminovaleric acid Orn Ornithine 2,5-diaminopentanoic acid CHEBI:18257 KEGG:C01602 CHEBI:7784 DL-Ornithine ornithinate ornithinium(1+) Escherichia coli metabolite human metabolite Daphnia magna metabolite non-proteinogenic alpha-amino acid algal metabolite