Dictionary
cys•tine
Pronunciation: (sis'tēn, -tin), [key]—
n. Biochem.
a crystalline amino acid, C
6H
12O
4N
2S
2, occurring in most proteins, esp. the keratins in hair, wool, and horn, and yielding cysteine on reduction.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.