Cysteine definition

sĭstə-ēn, -ĭn, -tē-
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An amino acid, C3 H7 O2 NS, derived from cystine and found in most proteins.
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A nonessential amino acid, HSCH2CH(NH2)COOH, derived from cystine.
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An amino acid, C3 H7 O2 NS, derived from cystine and found in most proteins.
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A nonessential amino acid. Chemical formula: C3H7NO2S.
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(biochemistry) A sulphur-containing nonessential amino acid C3H7NO2S found in most animal proteins; it readily oxidizes to cystine.
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Other Word Forms

Noun

Singular:
cysteine
Plural:
cysteines

Origin of cysteine

  • Alteration of cystine

    From American Heritage Dictionary of the English Language, 5th Edition

  • An alteration of cystine.

    From Wiktionary