Dictionary
cys•te•ine
Pronunciation: (sis'tē-ēn", -in), [key]—
n. Biochem.
a crystalline amino acid, C
3H
7O
2NS, a component of nearly all proteins, obtained by the reduction of cystine.
Abbr.: Cys;
Symbol: C
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.