DL-CYSTINE (3,3,3,3-D4) is a deuterium-labeled disulfide amino acid consisting of two cysteine residues linked by a central disulfide (-S-S-) bond, with the overall molecule bearing amino and carboxyl functional groups characteristic of cystine. The side chains contain sulfur atoms in the oxidized disulfide form, and the (3,3,3,3-D4) designation indicates four deuterium atoms incorporated at the specified cystine positions while the stereochemical designation remains racemic (DL). In research and analytical workflows, the isotopic labeling supports mass spectrometry-based quantification and isotopic tracing of cystine/disulfide-containing species, and the defined disulfide structure provides a chemically stable handle for preparing and studying disulfide-linked peptide or protein analogs and related amino acid derivatives.
CAT No: L-Iso-0207
4. Urinary Metabolites Associated with Blood Pressure on a Low-or High-Sodium Die
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