Meaning of cysteine

cys•te•ine

Pronunciation: (sis'tē-ēn", -in), [key]
— n. Biochem.
  1. a crystalline amino acid, CHONS, 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.
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