DL-LEUCINE (2-13C; 15N) is a stable-isotope-labeled, free amino acid belonging to the branched-chain amino acid family, featuring an isobutyl side chain attached to the α-carbon and bearing the standard amino acid backbone. The molecule contains an α-amino group and a carboxyl group, with the isotopic labels specifically incorporated at the 2-position carbon and the nitrogen atom, and it is provided as the DL stereochemical mixture indicated by the product name. As an isotopically labeled leucine analogue, it is used in isotopic tracing, quantitative mass spectrometry workflows, and labeling-based studies of amino acid incorporation, peptide/protein turnover, and analytical method development where defined 13C/15N enrichment is required.
CAT No: L-Iso-0361
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