Ornithine

(redirected from ornithine carbamoyl transferase (OCT), ornithine transcarbamoylase)
Also found in: Dictionary, Thesaurus, Medical.

ornithine

[′ȯr·nə‚thēn]
(biochemistry)
C5H12O2N2 An amino acid occurring in the urine of some birds, but not found in native proteins.

Ornithine

 

H2N(CH2)3CH(NH2)COOH (also α, δ-di-aminovaleric acid), an amino acid that is readily soluble in water and alcohol.

Ornithine has one asymmetric carbon atom and exists in two optically active forms (D- and L-) and one racemic form, L-ornithine, found in the tissues of animals and humans, plays an important role in the biosynthesis of urea by the ornithine cycle. It is formed from arginine and α-amino-y-formylbutyric acid and may be converted to proline. Free L-ornithine is found in plants; bound L-ornithine is a component of several peptide antibiotics (bacitracin and gramicidin). L-ornithine has not been isolated from natural proteins.

Full browser ?