Dietary Requirements of Leucine, Isoleucine, and Valine in Male Broilers During the Starter Period
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چکیده
منابع مشابه
Threonine, isoleucine, valine and leucine requirements of the young kitten.
Growth assays and nitrogen balance trials were conducted in an attempt to estimate requirements for threonine, isoleucine, valine and leucine. Weanling kittens were fed a basal purified diet containing 27% crystalline L-amino acids and 4,700 kcal metabolizable energy per kilogram diet. Based upon rate and efficiency of growth, and upon urinary nitrogen excretion, estimated requirements for thre...
متن کاملGlycyl dehydropeptides of leucine, valine, and isoleucine.
Glycyl dehydropeptides of alanine, phenylalanine, norvaline, norleucine, and or-aminobutyric acid, and N-acetyl dehydropeptides of these amino acids, tyrosine, valine, and leucine have been prepared (l-3). Although the glycyl dehydropeptides were found to be hydrolyzed by tissue extracts, the only enzymatically susceptible N-acetyl dehydropeptide was that of alanine (1). In an effort to acquire...
متن کاملLeucine and isoleucine requirements of the kitten.
In separate experiments the isoleucine and leucine requirements of the kitten were determined on the basis of growth and nitrogen retention. The dietary concentrations of isoleucine tested were (g/kg diet) 1.4, 2.2, 3.0, 3.8, 4.6 and 9.0 with adequate (12.0 g/kg diet) leucine. The levels of leucine tested were (g/kg diet) 5.0, 7.5, 9.0, 10.5, 12.0 and 20.0 in diets containing adequate (9.0 g/kg...
متن کاملLysine, methionine, phenylalanine, arginine, valine, isoleucine, leucine, and threonine maintenance requirements of broiler breeders.
Five hundred and sixty Cobb-Vantress broiler breeders were used to determine the maintenance requirement of dietary Arg, His, Ile, Leu, Lys, Met, Phe, Thr, and Val in 10 21-d assays using the comparative slaughter technique. Fifty sexually immature broiler breeder pullets per assay were given crystalline amino acid diets containing graded levels of Arg, His, Ile, Leu, Lys, Met, Phe, Thr, or Val...
متن کاملControl of isoleucine, valine, and leucine biosynthesis. I. Multivalent repression.
Repression of the formation of biosynthetic enzymes by the ultimate end product of their action has been shown to be an important aspect of metabolic regulation in microorganisms.1 In Escherichia coli and Salmonella typhimuwium each of the last four steps in the synthesis of valine and isoleucine is catalyzed by the same enzymes.2 Repression of these enzymes presents a unique situation since tw...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1990
ISSN: 0032-5791
DOI: 10.3382/ps.0690757