DL-CYSTEINE, S-BENZYL (1-13C) is a cysteine derivative in which the thiol side chain is benzyl-protected (S-benzyl) and the amino acid backbone bears a 13C label at the carbon position indicated by "(1-13C)," with the compound present as a DL mixture of stereoisomers. The molecule contains a free primary amino group and a free carboxyl group on the α-carbon, while the side-chain sulfur is substituted as a thioether (benzyl thioether) rather than a free thiol, which changes its acid-base and nucleophilicity profile relative to unprotected cysteine. In peptide and amino-acid derivative synthesis and analytical method development, this labeled, side-chain-protected cysteine analogue can be used to control chemoselectivity during coupling steps and to provide a defined isotopic handle for tracing, mass spectrometric detection, or structure verification of cysteine-containing products.
CAT No: L-Iso-0190
1. Adipose tissue is a key organ for the beneficial effects of GLP-2 metabolic function
2. Autoinhibition and phosphorylation-induced activation of phospholipase C-γ isozymes
3. The spatiotemporal control of signalling and trafficking of the GLP-1R
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