title: The tryptophan requirement of the kitten.
abstract: To estimate the tryptophan requirement of the kitten, six male and six female kittens were presented diets containing 0.7, 0.9, 1.1, 1.3, 1.5 and 3.0 g tryptophan/kg diet for six experimental periods lasting 10 d in accordance with a 6 X 6 balanced Latin-square design. Mean daily weight gain and nitrogen retention (N intake minus urinary and faecal N) plateaued at 1.1 g tryptophan/kg diet indicating that the minimal tryptophan requirement of the kitten was 1.1 g/kg diet. Plasma tryptophan concentration exhibited a marked increase at dietary tryptophan concentrations above 1.3 g/kg diet.
mesh_terms: D000596:Amino Acids / Q000097:blood; D000818:Animals; D001835:Body Weight; D002415:Cats / Q000378:metabolism*; D004032:Diet; D005260:Female; D008297:Male; D009584:Nitrogen / Q000378:metabolism; D009751:Nutritional Requirements; D014364:Tryptophan / Q000097:blood / Q000378:metabolism*
chemical_list: D000596:Amino Acids; D014364:Tryptophan; D009584:Nitrogen