HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Graber, G. Articles by Baker, D. H. Search for Related Content PubMed PubMed Citation Articles by Graber, G. Articles by Baker, D. H.

Sulfur Amino Acid Nutrition of the Growing Chick: Quantitative Aspects Concerning the Efficacy of Dietary Methionine, Cysteine and Cystine

University of Illinois,² Urbana-Champaign Campus, Urbana 61801

Abstract

Two assays were conducted to (1) determine if the chick has a lesser requirement for a methionine-cystine combination than for all methionine and (2) evaluate the efficacies of methionine, cystine and cysteine when added to a cystine-void crystalline amino acid diet. When the total sulfur amino acid (TSAA) requirement was expressed as a percent of the diet, the need for a methionine-cystine combination was less than for all methionine. This did not appear to be a result of metabolic inefficiency but rather due to the fact that feed intake maximized at a lesser concentration with the sulfur amino acid combination than with all methionine. The molar efficacies of methionine, cystine and cysteine were the same as indicated by slope-ratio.

¹ Present address: Bureau of Veterinary Medicine, Division of Nutritional Sciences, Food and Drug Administration, Rockville, Maryland 20852.

² Department of Animal Science.

This article has been cited by other articles:

				R. N. Dilger and D. H. Baker DL-Methionine Is as Efficacious as L-Methionine, but Modest L-Cystine Excesses Are Anorexigenic in Sulfur Amino Acid-Deficient Purified and Practical-Type Diets Fed to Chicks Poult. Sci., November 1, 2007; 86(11): 2367 - 2374. [Abstract] [Full Text] [PDF]

				M. A Humayun, J. M Turner, R. Elango, M. Rafii, V. Langos, R. O Ball, and P. B Pencharz Minimum methionine requirement and cysteine sparing of methionine in healthy school-age children. Am. J. Clinical Nutrition, November 1, 2006; 84(5): 1080 - 1085. [Abstract] [Full Text] [PDF]

				D. H. Baker Comparative Species Utilization and Toxicity of Sulfur Amino Acids J. Nutr., June 1, 2006; 136(6): 1670S - 1675S. [Abstract] [Full Text] [PDF]