Isotopic enrichment of amino acids in urine following oral infusions of l-[1-13C]phenylalanine and l-[1-13C]lysine in humans: Confounding effect of d-[13C]amino acids
β Scribed by Pauline B. Darling; Rachelle Bross; Linda J. Wykes; Ronald O. Ball; Paul B. Pencharz
- Book ID
- 117180869
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 688 KB
- Volume
- 48
- Category
- Article
- ISSN
- 1532-8600
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## Abstract We have developed a stereospecific chemomicrobiological synthesis of labeled tryptophan. Lβ[3β^13^C]Serine, [1β^15^N]β and [2β^13^C]indole were used as precursors for the synthesis of Lβ[Ξ²β^13^C]β, Lβ[1β²β^15^N]β, and Lβ[2β²β^13^C]tryptophan, respectively. The labeled precursors were inco