L-ARGININE:HCL (1-13C; ALPHA-15N) is a hydrochloride salt form of L-arginine in which the α-amino nitrogen is labeled with 15N and the α-carbon is labeled with 13C, retaining the canonical basic, proteinogenic amino acid framework with a guanidinium-containing side chain. The molecule bears a free α-amino group and a carboxyl group (as the hydrochloride salt), while the side chain presents a strongly basic guanidinium functionality capable of ionic and hydrogen-bonding interactions, with stereochemistry consistent with the L-configuration indicated in the name. In biochemical and analytical workflows, this isotopically labeled amino acid is used as a tracer or reference material for isotopic labeling studies, mass spectrometry-based quantification, and peptide or protein labeling experiments where defined incorporation of the labeled arginine backbone is required.
CAT No: L-Iso-0086
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