Abstract
Evidence obtained from incubation of corn (Zea mays cv. Golden Bantam) seedlings in dl-[benzene ring-U-14C]tryptophan, l-[5-3H]tryptophan, l-[U-14C]aspartate and [U-14C]glycerol indicates that niacin is synthesized in these plants via oxidative degradation of tryptophan. Aspartate and glycerol do not appear to be precursors of niacin in corn seedlings.
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Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Bieleski R. L., Turner N. A. Separation and estimation of amino acids in crude plant extracts by thin-layer electrophoresis and chromatography. Anal Biochem. 1966 Nov;17(2):278–293. doi: 10.1016/0003-2697(66)90206-5. [DOI] [PubMed] [Google Scholar]
- GOLDSMITH G. A. Niacin-tryptophan relationships in man and niacin requirement. Am J Clin Nutr. 1958 Sep-Oct;6(5):479–486. doi: 10.1093/ajcn/6.5.479. [DOI] [PubMed] [Google Scholar]
- HORWITT M. K. Niacin-tryptophan relationships in the development of pellagra. Am J Clin Nutr. 1955 May-Jun;3(3):244–245. doi: 10.1093/ajcn/3.3.244. [DOI] [PubMed] [Google Scholar]
- Hengen N., Seiberth V., Hengen M. High-performance liquid-chromatographic determination of free nicotinic acid and its metabolite, nicotinuric acid, in plasma and urine. Clin Chem. 1978 Oct;24(10):1740–1743. [PubMed] [Google Scholar]
- Schneider E. A., Wightman F. Amino acid metabolism in plants. V. changes in basic indole compounds and the development of tryptophan decarboxylase activity in barley (Hordeum vulgare) during germination and seedling growth. Can J Biochem. 1974 Aug;52(8):698–705. doi: 10.1139/o74-099. [DOI] [PubMed] [Google Scholar]
- WILTSHIRE G. H. The oxidation of tryptophan in pea-seedling tissues and extracts. Biochem J. 1953 Oct;55(3):408–416. doi: 10.1042/bj0550408. [DOI] [PMC free article] [PubMed] [Google Scholar]