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The effect of dietary protein level on threonine dehydrogenase activity in chickens.

Abstract
An experiment was carried out to determine the effect of dietary protein level on the specific activity of hepatic L-threonine dehydrogenase in young growing chicks. Six replicate pens of seven Leghorn chicks were fed semipurified diets containing 23, 27, or 32% CP with identical relative proportions of amino acids in each protein group. Body weights and feed consumption were measured for 3 d, and hepatic mitochondria were isolated for assay of threonine dehydrogenase (TDH) activity. Weight gains and feed efficiency increased at each level of protein supplementation, but feed consumption was not affected by protein level. The specific activity of threonine dehydrogenase in isolated liver mitochondria was significantly (P < 0.05) higher in the 32% CP group than in the 23% CP group, and the activity in the 27% CP group was intermediate. We conclude that moderate increases in dietary protein level result in elevated hepatic threonine dehydrogenase activity in growing chicks.
AuthorsJ H Yuan, R E Austic
JournalPoultry science (Poult Sci) Vol. 80 Issue 9 Pg. 1353-6 (Sep 2001) ISSN: 0032-5791 [Print] England
PMID11558922 (Publication Type: Journal Article)
Chemical References
  • Dietary Proteins
  • Alcohol Oxidoreductases
  • L-threonine 3-dehydrogenase
Topics
  • Alcohol Oxidoreductases (metabolism)
  • Animal Feed
  • Animals
  • Animals, Newborn
  • Body Weight (drug effects, physiology)
  • Chickens (growth & development, metabolism)
  • Dietary Proteins (administration & dosage, pharmacology)
  • Eating
  • Enzyme Activation
  • Male
  • Mitochondria, Liver (enzymology)

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