S-Acetamidomethyl-L-cysteine monohydrate is a protected, sulfur-functionalized L-cysteine derivative in which the cysteine thiol is converted to an S-acetamidomethyl thioether, while the amino acid backbone retains an amino group and a carboxyl group. The molecule is present as a monohydrate, and the side chain bears the acetamidomethyl substituent that masks the native thiol functionality, reducing thiol reactivity and providing a defined sulfur environment for subsequent transformations. In peptide chemistry and chemical biology workflows, this protected cysteine analogue is used as a precursor building block to control chemoselectivity during coupling steps and to enable incorporation of a cysteine-derived residue into larger peptide or conjugate structures under conditions that accommodate the thioether-protected side chain.
CAT No: CP00642
CAS No:19647-70-2
Synonyms/Alias:H-Cys(Acm)-OH.H2O;(R)-3-((Acetamidomethyl)thio)-2-aminopropanoicacidhydrate;19647-70-2;213475-48-0;H-Cys(Acm)-OHH2O;CTK6A1216;S-Acetamidomethyl-L-cysteinehydrate;AKOS022175224;AK142604;AT-25485;KB-60379;X5796;H-Cys(Acm)-OHinvertedexclamationmarkcurrencyH2O
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