DL-HISTIDINE (RING-2-13C) is a stable-isotope-labeled, free amino acid in the histidine family, featuring an imidazole side chain where the ring carbon at the 2-position is enriched with 13C. The molecule contains both an α-amino group and a carboxyl functional group, with the imidazole nitrogen atoms providing basic/tautomerizable ring functionality that can participate in acid-base equilibria, while the "DL" designation indicates a racemic mixture of stereoisomers at the α-carbon. As an isotopically labeled tracer and analytical standard, it is used in amino acid profiling, NMR or mass spectrometric method development, and labeling-based studies that track the incorporation or transformation of histidine-derived fragments in chemical and biochemical workflows.
CAT No: L-Iso-0303
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