See also: Cysteine and cystéine

English

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Etymology

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An alteration of cystine, see -eine.

Pronunciation

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IPA(key): /ˈsɪs.tɪ.iːn/

Noun

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cysteine (countable and uncountable, plural cysteines)

 
Skeletal formula of L-cysteine.
 
Skeletal formula of D-cysteine.
  1. (biochemistry) A sulphur-containing nonessential amino acid C3H7NO2S found in most animal proteins; it readily oxidizes to cystine.

Usage notes

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When used as the name of a substance, this noun is uncountable, but when used as the name of individual molecules, it is countable.

Synonyms

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Derived terms

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Translations

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