L-CYSTEINE-N-T-BOC, S-P-MEBZ (15N) is a nitrogen-protected cysteine derivative bearing an N-tert-butoxycarbonyl (N-Boc) group and a sulfur-protected thioether/benzyl-type substituent, with an isotopic 15N label incorporated into the amino functionality. The molecule contains a Boc-protected amino group and a carboxyl group (as the free acid form implied by the cysteine backbone naming), while the side-chain sulfur is masked by a benzyl-derived protecting group (S-P-MEBZ) that modulates thiol reactivity and chemoselectivity during peptide chemistry. In synthesis and analytical workflows, the labeled, protected cysteine analogue is used as a controlled building block for stepwise peptide assembly and for isotopic labeling strategies in mass spectrometry or NMR-based studies of peptide and protein derivatives.
CAT No: L-Iso-0201
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