L-LYSINE:2HCL (4,4,5,5-D4,) is a deuterium-labeled free amino acid salt in which lysine bears four deuterium atoms at the 4 and 5 positions of its aliphatic side chain (D4) and is present as the dihydrochloride. The molecule contains an α-amino group and an α-carboxyl group on the lysine backbone, while the side chain terminates in a primary amine that can be protonated under acidic salt conditions, and the isotopic labeling is confined to the side-chain carbon framework without altering the amino-acid connectivity. As an isotopically labeled internal standard or tracer precursor, this compound is used in analytical method development and isotopic tracing workflows, including mass spectrometric quantification and studies of lysine-containing peptide or biomolecule synthesis and remodeling where side-chain hydrogen-carbon labeling is monitored.
CAT No: L-Iso-0401
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