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Utilization of a Delayed Lysine Supplement by Young Rats¹

Department of Foods and Nutrition, Agricultural Experiment Station and School of Home Economics, Purdue University, Lafayette, Indiana

Experiments were conducted to determine the utilization by young rats of the delayed lysine supplement administered by stomach tube or incorporated in an otherwise adequate but protein-free basal diet.

Data obtained indicate that young rats can synthesize protein when fed an otherwise adequate diet containing proteins deficient in lysine, for 12 hours, and then, in the next 12 hours, fed a protein-free basal diet and a single daily dose of lysine given by stomach tube, or the same basal diet supplemented with lysine.

² Present address: School of Home Economics, Louisiana State University, P.O. Box 8113, University Station, Baton Rouge 3, Louisiana.

³ Present address: Department of Animal Sciences, Purdue University.

Manuscript received 16 July 1962.