L-CYSTEINE (15N) contains the amino acid framework of cysteine with a thiol-bearing side chain and a primary amino group and carboxyl group, where the nitrogen atom is isotopically labeled with 15N. The molecule corresponds to the L-stereochemical form as indicated by the name, and its side-chain thiol can undergo the typical redox and nucleophilic chemistry associated with cysteine while remaining available for derivatization or protection depending on the experimental design. In biochemical and analytical workflows, the 15N label enables isotopic tracing and mass spectrometric or NMR-based quantification of cysteine-containing species, including cysteine residues and cysteine-derived peptide or small-molecule intermediates.
CAT No: L-Iso-0181
1. TMEM16F and dynamins control expansive plasma membrane reservoirs
4. Cationic cell-penetrating peptides are potent furin inhibitors
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