L-LYSINE:2HCL (6-13C; EPSILON-15N) is a labeled, free amino acid belonging to the basic aliphatic family, featuring the lysine backbone with an ε-amino side chain and a carboxyl group, present as a dihydrochloride salt. The molecule bears isotopic labels at the side-chain carbon corresponding to the 6-position (13C) and at the ε-nitrogen (15N), while the amino and carboxyl functionalities are protonated/ion-paired under the hydrochloride salt form, affecting solubility and chromatographic behavior. This isotopically enriched lysine is used in peptide and protein labeling workflows, amino acid incorporation studies, and quantitative analytical method development where mass-dependent detection and isotopic tracing of lysine-derived fragments are required.
CAT No: L-Iso-0405
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