DL-CYSTEINE (3-13C) is a stable isotope-labeled amino acid derivative belonging to the cysteine class, featuring a thiol-containing side chain attached to a standard amino acid backbone and bearing a carboxyl group and an amino group. The side chain contains a sulfhydryl functionality that can participate in redox and nucleophilic chemistry, while the "3-13C" labeling indicates incorporation of a 13C isotope at the carbon position associated with cysteine's side chain (as specified by the product name), with the "DL" designation indicating a racemic mixture of stereoisomers. In research and analytical workflows, the labeled cysteine is used for isotopic tracing, LC-MS or NMR method development, and quantitative studies of amino acid incorporation or transformation where the site-specific 13C label provides a distinguishable chemical signature.
CAT No: L-Iso-0188
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