L-LYSINE:2HCL (15N2+) is an isotopically labeled free amino acid consisting of the lysine side chain bearing a terminal ε-amino group, with the α-amino and α-carboxyl functional groups present and the molecule supplied as a dihydrochloride salt. The "15N2+" designation indicates incorporation of two 15N isotopes on the nitrogen-containing sites, and the hydrochloride counterions associate with the protonated amine functionalities to form a salt form that remains water-soluble and chemically defined for labeling workflows. In biochemical and analytical research, this labeled lysine is used as an isotopic tracer or internal standard to support nitrogen-based mass spectrometry measurements, peptide/protein labeling strategies, and structure-analysis studies where controlled ^15N enrichment is required.
CAT No: L-Iso-0398
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