Catabolism of Lysine by Mixed Rumen Bacteria
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چکیده
منابع مشابه
Catabolism of L-lysine by Pseudomonas aeruginosa.
Pseudomonas aeruginosa PACI grows poorly on L-lysine as sole source of carbon but mutant derivatives which grow rapidly were readily isolated. Studies with one such mutant, P. aeruginosa PAC586, supported the existence of a route for L-lysine catabolism which differes from those reported previously in other species of Pseudomonas. The postulated route, the cadaverine or decarboxylase pathway, i...
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Nuclear magnetic resonance (NMR) was used to study the metabolism of the rumen bacterial ecosystem. The fermentation of 1-13C-glucose was investigated. This system showed a transient build-up and decay of lactate labelled at the C3 position. The degradation of lactate gave rise to volatile fatty acids. These results agree with in vivo data on diets rich in available carbohydrates.
متن کاملSome factors influencing the chemical composition of mixed rumen bacteria.
I. Sheep, cows and calves fitted with rumen cannulas were given diets mostly containing 10-16 g nitrogen/kg dry matter and consisting of roughage and cereals. Mixed bacteria w-ere separated from samples of their lumen contents. 2. Bacteria taken 4-6 h after a feed from calves which were kept in an experimental calfhouse with no contact with adult animals (environment -4) contained more a-dextra...
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Mixed cultures of rumen bacteria were inoculated into anaerobic buffer solutions containing mixed carbohydrates, casein and ammonia, and rates of bacterial growth, protein degradation, ammonia formation or utilization and lactate production were determined. Bacterial growth rate was varied by the provision of excess carbohydrate (one large dose at the onset of the incubation) or limited carbohy...
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Lysine is frequently a first- or second-limiting amino acid in poultry diets. Improving the efficiency of lysine use for protein synthesis would effectively lower the lysine requirement and decrease feed costs. Understanding how lysine is degraded and how the degradation is regulated would identify potential molecular targets for interventions to decrease lysine degradation. To better understan...
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ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1975
ISSN: 0002-1369
DOI: 10.1080/00021369.1975.10861769