L-LYSINE:2HCL (D9; 15N2) is a deuterium- and nitrogen-15 isotopically labeled form of L-lysine present as a 2HCl salt, featuring the lysine side chain with a terminal aliphatic amine and a primary α-amino group alongside a carboxyl group. The molecule bears nine deuterium atoms (D9) and two 15N atoms (15N2), and the hydrochloride salt form associates with the basic amine functionalities to define its protonation state for handling and derivatization in analytical workflows. As an isotopically labeled amino acid, it is used as a tracer and internal standard in mass spectrometry-based quantification, metabolic or turnover studies by isotopic labeling, and peptide or amino acid derivative synthesis where labeled lysine incorporation is required for structure-activity studies or chemical biology experiments.
CAT No: L-Iso-0409
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