PMID: 9001379Dec 1, 1996Paper

Efficiency of lysine or threonine retention in growing rats fed diets limiting in either lysine or threonine

The Journal of Nutrition
M J GahlN J Benevenga

Abstract

Over a 21-d experiment, the efficiency of lysine and threonine retention was determined in 80 male Sprague-Dawley rats (65.9 +/- 0.3 g, means +/- SE) fed purified diets containing an amino acid mix limiting in either lysine or threonine. With additional increments of the first limiting amino acid, lysine concentration in total body protein (g/16 g N) increased (P < 0.01) in rats fed lysine-limiting diets but, when fed threonine-limiting diets, lysine concentration in body protein first increased and then decreased (P < 0.01). As increments of the first limiting amino acid were added, the threonine concentration in total body protein increased then decreased when both lysine- (P < 0.01) and threonine- (P < 0.06) limiting diets were fed. Lysine and threonine retention were calculated based on comparative slaughter. Sixteen rats were killed on d 0 to estimate the grams of amino acid in the body. Retention responses were analyzed using a logistic equation in which lysine or threonine intake was used to predict retention. The maximum marginal efficiency (dr/dI, retention/intake) was observed at <40% of maximum retention. For lysine retention, it was 81% when lysine was limiting and 70% when threonine was limiting. For threonine rete...Continue Reading

Citations

Jan 15, 2009·Journal of Animal Physiology and Animal Nutrition·J HegerD Hampel
Jan 14, 2009·The British Journal of Nutrition·Noelie BodinXavier Rollin
Nov 12, 2019·Journal of Animal Physiology and Animal Nutrition·Letícia G PachecoBruno B Leme
Nov 27, 2002·The American Journal of Clinical Nutrition·Gunda BackesCornelia C Metges
Feb 19, 2014·Animal : an International Journal of Animal Bioscience·J A Conde-AguileraJ van Milgen
Jul 22, 2006·The Journal of Nutrition·Joost J G C van den BorneWalter J J Gerrits
Aug 5, 2004·Journal of Dairy Science·L DoepelH Lapierre
Aug 1, 2010·Animal : an International Journal of Animal Bioscience·J A Conde-AguileraJ van Milgen

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