title: Effect of concentration of some dietary amino acids and protein on plasma urea nitrogen concentration in growing kittens.
abstract: The effect of various levels of leucine, isoleucine, tryptophan, histidine and phenylalanine with and without tyrosine in isonitrogenous purified amino acid-based diets on plasma urea nitrogen (PUN) of growing kittens was examined. In addition, the effect of various levels of nitrogen supplied as amino acids or as a mixture of amino acids and protein on PUN was measured. PUN was not a useful predictor of the concentration of an amino acid that maximized either growth or nitrogen balance. Intake of nitrogen was highly correlated with PUN and accounted for 96% of the variation in PUN.
authors: Department of Physiological Sciences and Animal Science, University of California, Davis 95616.
authors: M H
authors: MH
authors: Kang
authors: J G
authors: JG
authors: Morris
authors: Q R
authors: QR
authors: Rogers
mesh_terms: D000601:Amino Acids, Essential / Q000008:administration & dosage* / Q000378:metabolism; D000818:Animals; D001806:Blood Urea Nitrogen; D002415:Cats / Q000097:blood / Q000254:growth & development*; D004044:Dietary Proteins / Q000008:administration & dosage* / Q000378:metabolism; D005260:Female; D008297:Male; D009584:Nitrogen / Q000008:administration & dosage; D009751:Nutritional Requirements
chemical_list: D000601:Amino Acids, Essential; D004044:Dietary Proteins; D009584:Nitrogen