| 释义 |
cysteine Biochem.|ˈsɪstiːɪn, ˈsɪstiːaɪn|
Also -ein.
[ad. G. cysteïn (E. Baumann 1882, in Zeitschr. f. physiol. Chem. VIII. 302), f. cystine + -eine.]
An amino-acid, HS·CH2·CH(NH2)·COOH, which is a reduction product of cystine and a constituent of glutathione and many proteins.
1884Jrnl. Chem. Soc. XLVI. A. 1382 Cystine and Cysteïne... The hydrochloride of the new base cysteïne is obtained by evaporating the filtrate. 1923Nature 24 Feb. 274/1 The reduction of methylene blue by the sulphydryl compounds, reduced glutathione, cystein, and thioglycollic acid, is an autocatalytic reaction. 1961Lancet 8 July 87/2 Two cysteine molecules readily give up their hydrogen atoms..to reunite as cystine. 1970R. W. McGilvery Biochem. xvii. 382 Cystine enters metabolism as cysteine. |