title: Lysine requirement of kittens given purified diets for maximal growth.
abstract: Three experiments were conducted using a total of 15 male and 15 female weaned specific pathogen-free kittens given amino acid-based purified diets containing varying concentrations of lysine (from 4.0 to 11.3 g/kg diet) in a Latin square design of 10 day periods. In experiment 1, the predicted lysine requirement was 7.7 g/kg diet, and in experiments 2 and 3, maximal weight gain occurred at 8.0 g lysine/kg diet. In experiment 3, nitrogen balance was not different for kittens given diets containing 8.0 and 9.0 g lysine/kg. These experiments support a requirement of 8.0 g lysine (free base)/kg diet, in a diet with a calculated metabolizable energy value of 4.7 kcal/g.
authors.affiliation: Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA. jgmorris@ucdavis.edu
authors.forename: J G
authors.initials: JG
authors.lastname: Morris
authors.forename: Q R
authors.initials: QR
authors.lastname: Rogers
authors.forename: J A
authors.initials: JA
authors.lastname: O'Donnell
mesh_terms: D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D000831:Animals, Newborn / Q000254:growth & development; D002415:Cats / Q000254:growth & development* / Q000378:metabolism; D004044:Dietary Proteins / Q000008:administration & dosage; D004305:Dose-Response Relationship, Drug; D005260:Female; D008239:Lysine / Q000008:administration & dosage* / Q000502:physiology; D008297:Male; D009584:Nitrogen / Q000378:metabolism; D009751:Nutritional Requirements; D011897:Random Allocation; D013047:Specific Pathogen-Free Organisms; D015430:Weight Gain / Q000502:physiology*
chemical_list: D004044:Dietary Proteins; D008239:Lysine; D009584:Nitrogen