K. Shibata, Mika Sawabe, T. Fukuwatari
Jan 1, 2000
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Influential Citations
9
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Quality indicators
Journal
Bioscience, Biotechnology, and Biochemistry
Abstract
L-Tryptophan is a very important precursor of niacin in mammals. Food preparation in which proteins are exposed to an alkali and/or high temperature for a long period generate appreciable amounts of D-amino acids from racemization. The efficiency of D-tryptophan as niacin was thus investigated by using weanling rats. The availability of D-tryptophan was almost the same as that in L-tryptophan as the precursor of niacin and was 1/6 as active as niacin.