S-p-Methylbenzyl-L-cysteine is a sulfur-bearing, proteinogenic amino acid derivative of L-cysteine in which the thiol side chain is substituted with an S-p-methylbenzyl group, forming a thioether rather than a free thiol. The molecule contains an amino group and a carboxyl group characteristic of cysteine derivatives, while the benzyl substituent on sulfur provides a hydrophobic aromatic side-chain element and alters redox and nucleophilicity relative to unmodified cysteine. In peptide chemistry and chemical biology workflows, this protected/derivatized cysteine analogue is used as a building block or intermediate to introduce a cysteine-derived residue with controlled sulfur functionality for peptide synthesis, conjugation handle management, and structure-activity or labeling studies.
CAT No: CP00640
CAS No:42294-52-0
Synonyms/Alias:S-p-Methylbenzyl-L-cysteine;42294-52-0;(R)-2-Amino-3-((4-methylbenzyl)thio)propanoicacid;S-(4-METHYLBENZYL)-L-CYSTEINE;AmbotzHAA6090;H-Cys(4-Mbzl)-OH;H-Cys(4-Mebzl)-OH;CHEMBL64242;SCHEMBL1158095;CTK7D1100;MolPort-002-492-165;QOAPFSZIUBUTNW-JTQLQIEISA-N;ZINC4668208;ANW-57510;AKOS010379543;AM81681;AJ-51866;AK-81237;KB-60614;ST2414446;TC-146255;FT-0639783;X5783;K-8797
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