L-ORNITHINE:HCL (5-13C; 4,4,5,5-D4) is an isotopically labeled, free amino acid salt in which L-ornithine is present as the hydrochloride and bears a 13C label at the specified position along with deuterium substitution at the 4,4,5,5 positions. The molecule contains an amino group and a carboxyl group characteristic of amino acids, and its side chain is a linear polyamine featuring additional terminal amino functionality that can participate in protonation and ionic interactions under aqueous conditions. As an isotopically enriched tracer, it is used in analytical method development and isotopic labeling workflows for studying amino acid handling, monitoring incorporation or transformation by mass spectrometry, and supporting chemical biology experiments that require position-specific labeling of ornithine-derived carbon and hydrogen.
CAT No: L-Iso-0467
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