Ornithine

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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.

References in periodicals archive ?
In order for ORN to serve the LGBTI community in Hardap and //Kharas region, ORN is in the process of opening an office at Keetmanshoop.
If we can make a tool appear very simple--so it looks almost too simple to do anything powerful--then we're hitting the mark," Orn says.
Orn and Volnard eventually part company, leading to the most compelling chapter: "Separation" (each of the film's seven segments is introduced in garish red letters, a punk touch in an otherwise spartan film).
XLII/1 (S# 87); Porter to Welles, AAR, 26 December 1864, ORN, series 1, vol.
1, RG 24; "Register, Sick and Wounded," RG 52; "Hospital Ship Red Rover," GAO, RG 217; ORN, ser.
In June 2014, the ORN reviewed the outcomes and mandated the expansion of this quality improvement initiative provincially, as a key initiative to support the growth of home hemodialysis in Ontario.
Mr orn has previously been connected with Kettering football club and since leaving the armed forces in 1991 has spearheaded several successful road transport companies.
HOW THEY RATED: PULL-OUT PAGES 4 & 5 AGO AGONY FOR ENGLAND: STORY OF THE PENALTY SHOOT-OUT R ENG ENG STOR HE SH Gerrard Perfect into the corner ner rner Balotelli Sweetly into bottom corner m corn orn orn orn orner Rooney Perfect again.