L-CYSTEINE-N-FMOC, S-TRITYL (13C3,15N) is an Fmoc-protected cysteine derivative bearing a trityl (S-trityl) thioether protection on the side-chain sulfur and isotopic enrichment at the cysteine backbone (13C3,15N). The molecule contains an Fmoc carbamate on the amino group and a free carboxyl group, with the sulfur substituent functioning as a protected thiol equivalent that can be deprotected during peptide assembly while maintaining chemoselectivity toward the side chain. In peptide chemistry and chemical biology workflows, it is employed as a labeled, stepwise building block for solid-phase or solution-phase synthesis of cysteine-containing peptides and for preparing isotopically tagged analogues used in structural characterization, analytical method development, or labeling-based studies.
CAT No: L-Iso-0195
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