Effect of Dietary Lysine Level on Plasma Free Amino Acids in Adult Cockerels
- 1 May 1972
- journal article
- research article
- Published by Elsevier in Journal of Nutrition
- Vol. 102 (5) , 603-608
- https://doi.org/10.1093/jn/102.5.603
Abstract
Plasma free amino acids in adult cockerels were measured 2 hours after a meal to study the effect of the dietary lysine level on the plasma free amino acid concentration. L-Lysine was added to a 3% casein diet (lysine level, 0.21%) to provide lysine concentrations of 0.42 to 1.47% in the diet. The response curves of the plasma free amino acid concentration to the dietary lysine level could be grouped into four types. Lysine was constant when dietary lysine increased from 0.21 to 0.63%, but increased with a further increase of dietary lysine. Valine, tyrosine, leucine, histidine, phenylalanine, isoleucine, cystine, methionine, proline, glutamic acid, glycine and aspartic acid remained constant when the dietary lysine increased from 0.21 to 1.47%. Threonine, tryptophan, serine and alanine increased with an increase of dietary lysine from 0.21 to 1.47%. Arginine was constant when dietary lysine increased from 0.21 to 0.84%, but decreased with a further increase of dietary lysine. Body weight was unchanged when the dietary lysine level was between 0.21 and 0.63%, whereas it was reduced by further increases in dietary lysine. Results suggest that this loss in body weight was a major factor affecting the observed plasma levels of the amino acids, along with differences among the amino acids in their susceptibility to catabolism and in the amounts ingested.Keywords
This publication has 9 references indexed in Scilit:
- Effect of Dietary Protein Level on Plasma Free Amino Acids in the ChickenJournal of Nutrition, 1971
- Kidney Arginase Activity and Lysine Tolerance in Strains of Chickens Selected for a High or Low Requirement of ArginineJournal of Nutrition, 1968
- A COMPARISON OF THE EFFECT OF DIETARY FAT AND CARBOHYDRATE ON FREE AMINO ACIDS IN THEBLOOD PLASMA OF CHICKSCanadian Journal of Physiology and Pharmacology, 1967
- Arginine-Lysine Antagonism in the Chick and Its Relationship to Dietary CationsJournal of Nutrition, 1966
- Plasma Amino Acid Levels of Men Fed Diets Differing in Protein Content. Some Observations with Valine-deficient DietsJournal of Nutrition, 1966
- The arginine‐lysine interaction in the chick1British Poultry Science, 1966
- Interrelationship of Plasma Amino Acid Levels and Weight Gain in the Chick as Influenced by Suboptimal and Superoptimal Dietary Concentrations of Single Amino AcidsJournal of Nutrition, 1965
- Efficacy of Glycine and Arginine in Alleviating the Stress Induced by Dietary Excesses of Single Amino AcidsPoultry Science, 1961
- Amino Acid Requirements for Maintenance in the Adult RoosterJournal of Nutrition, 1960