L-ARGININE:HCL (15N4) is an isotopically labeled, free amino acid salt consisting of L-arginine associated with hydrochloride, where four nitrogen atoms are enriched with the 15N isotope. The molecule contains the amino group and carboxyl group of an α-amino acid and bears a side-chain guanidinium functionality characteristic of arginine, with the guanidinium nitrogen atoms forming the labeled positions indicated by the (15N4) designation. As a labeled arginine hydrochloride, it is used in isotopic tracing, mass spectrometry-based analytical method development, and peptide or protein labeling workflows where nitrogen isotope incorporation into arginine-containing structures is tracked.
CAT No: L-Iso-0090
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