L-HISTIDINE:HCL:H2O (13C6,D5,15N3) is a stable isotopically labeled form of L-histidine presented as a hydrochloride monohydrate, where six ring carbons (13C6), five hydrogens (D5), and three nitrogens (15N3) are enriched relative to the natural isotopic composition. The molecule contains an amino group and a carboxyl group on the histidine backbone, with the imidazole side chain providing a basic, protonatable functionality that can participate in acid-base equilibria under experimental conditions, while the hydrochloride and associated water specify its salt and hydration state. As an isotopic tracer and mass-spectrometry-compatible reference, it is used in analytical method development, quantitative labeling studies, and peptide or protein research workflows where incorporation or detection of histidine-derived fragments with defined isotopic signatures is required.
CAT No: L-Iso-0311
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