L-ISOLEUCINE (13C6) is an isotopically labeled, free amino acid belonging to the aliphatic, branched-chain amino acid class, featuring the characteristic α-amino and α-carboxyl groups attached to a sec-butyl side chain. The side chain contains six ^13C atoms in the carbon framework while retaining the L-stereochemical designation implied by the "L-" prefix, and the molecule exists as an amino acid rather than a protected or derivatized intermediate. L-ISOLEUCINE (13C6) is used in isotopic tracing, quantitative mass spectrometry, and NMR-based analytical method development where the ^13C labeling enables discrimination of the labeled amino acid in peptide and protein-related studies or other biochemical sample matrices.
CAT No: L-Iso-0326
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