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Journal of Nutrition Vol. 34 No. 6 December 1947, pp. 701-713
Copyright © 1947 by American Society for Nutrition
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Studies on the Requirement of the Chick for Tryptophane

One Figure

M. C. Wilkening1, B. S. Schweigert, P. B. Pearson and R. M. Sherwood

Department of Biochemistry and Nutrition and Department of Poultry Husbandry, Agricultural and Mechanical College of Texas, College Station, Texas

Chicks were fed a purified, tryptophane-low diet in which the major sources of protein were 12% oxidized casein and 10% gelatin supplemented with cystine and methionine. Chicks grew normally when an adequate amount of tryptophane was added to this diet. Using this ration with graded levels of tryptophane and a ration in which untreated casein supplied the tryptophane, the l(-)tryptophane requirement of the New Hampshire x White Leghorn crossbred chick and the White Leghorn chick was shown to be 0.18% of the diet.

1 Present address: Research Laboratory, Security Mills, Knoxville, Tennessee.

Manuscript received 8 August 1947.




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