DL-METHIONINE (13C5,D8,15N) is a stable-isotope-labeled amino acid belonging to the sulfur-containing, proteinogenic methionine family, featuring a thioether side chain attached to the α-amino acid backbone. The molecule bears an amino group and a carboxyl group on the α-carbon while the side-chain carbon and hydrogen positions and the nitrogen are enriched with 13C, D, and 15N isotopes, respectively, with the DL designation indicating a racemic (unresolved) mixture of stereoisomers. In biochemical and analytical workflows, the labeled methionine is used as an isotopic tracer and reference material for mass spectrometry-based quantification, metabolic or turnover studies at the level of chemical incorporation, and the preparation of isotope-resolved amino acid and peptide derivatives for structure and labeling experiments.
CAT No: L-Iso-0430
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