L-METHIONINE (2,3,3,4,4-D5; METHYL-13CH3) is an isotopically labeled, proteinogenic amino acid belonging to the thioether-containing methionine family, featuring a branched side chain with a thioether (methylthio) group attached to the α-amino acid framework. The molecule contains an α-amino group and a carboxyl group, and its stereochemistry corresponds to the L-methionine form as indicated by the product name, while the side chain carries deuterium substitutions at positions 2, 3, 3, 4, and 4 and a 13C-labeled methyl group (METHYL-13CH3) for mass-shift tracing. As an isotopically labeled amino acid, it is used as a substrate or reference material in isotopic tracing, quantitative analytical method development (e.g., mass spectrometry-based workflows), and peptide/protein labeling studies where retention of the methionine side-chain identity is required.
CAT No: L-Iso-0435
1. Emu oil in combination with other active ingredients for treating skin imperfections
2. An Open-label, Single-center, Safety and Efficacy Study of Eyelash Polygrowth Factor Serum
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