L-LYSINE, NE-CARBOXYMETHYL (4,4,5,5-D4, contains a lysine backbone bearing a side-chain primary amine that is substituted with a carboxymethyl group, forming an Nε-carboxymethylated derivative. The molecule retains both an amino group and a carboxylic acid group on the α-carbon framework, while the Nε substituent is isotopically labeled with deuterium at the (4,4,5,5-D4) positions to enable isotopic tracking in analytical workflows. As a labeled, derivatized amino acid, it is used as a substrate analog or reference material in isotopic tracing, mass spectrometry method development, and chemical biology studies that require differentiation of lysine-derived species during peptide or conjugate analysis.
CAT No: L-Iso-0389
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