Synthesis and absorption of cysteine from the hindgut of the horse

The extent to which cysteine synthesised by microbes within the hindgut of the horse is incorporated into plasma cysteine was estimated by an isotopic technique in two horses fed four different diets. The results showed that between 1 per cent and 6 per cent of the plasma cysteine was of microbial o...

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Bibliographic Details
Published inEquine veterinary journal Vol. 19; no. 3; pp. 192 - 194
Main Authors McMeniman, N.P, Elliott, R, Groenendyk, S, Dowsett, K.F
Format Journal Article
LanguageEnglish
Published United States 01.05.1987
Subjects
Animals
cecum
cysteine
Cysteine - biosynthesis
Cysteine - blood
Cysteine - metabolism
Diet
Female
hindgut
horses
Horses - metabolism
Horses - microbiology
Intestinal Absorption
Intestine, Large - metabolism
Intestine, Large - microbiology
Male
synthesis
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Summary:The extent to which cysteine synthesised by microbes within the hindgut of the horse is incorporated into plasma cysteine was estimated by an isotopic technique in two horses fed four different diets. The results showed that between 1 per cent and 6 per cent of the plasma cysteine was of microbial origin. It is argued that the maximum contribution of microbial cysteine, and presumably other amino acids of microbial origin, to the plasma pool is 12 per cent of the net supply. These data support the hypothesis that microbial amino acid synthesis within the hindgut of the horse does not significantly affect its amino acid status.
ISSN:0425-1644
2042-3306
DOI:10.1111/j.2042-3306.1987.tb01374.x