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cysteine

[ sis-tee-een, -in ]

noun

, Biochemistry.
  1. a crystalline amino acid, C 3 H 7 O 2 NS, a component of nearly all proteins, obtained by the reduction of cystine. : Cys; : C


cysteine

/ -ɪn; ˈsɪstɪˌiːn /

noun

  1. a sulphur-containing amino acid, present in proteins, that oxidizes on exposure to air to form cystine. Formula: HSCH 2 CH(NH 2 )COOH
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

cysteine

/ sĭstə-ēn′ /

  1. A nonessential amino acid. Chemical formula: C 3 H 7 NO 2 S.
  2. See more at amino acid
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Derived Forms

  • ˌcysteˈinic, adjective
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Other Words From

  • cyste·inic adjective
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Word History and Origins

Origin of cysteine1

First recorded in 1880–85; alteration of cystine
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Word History and Origins

Origin of cysteine1

C19: variant of cystine
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Compare Meanings

How does cysteine compare to similar and commonly confused words? Explore the most common comparisons:

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Example Sentences

"It can modify proteins through a process called sulfhydration, where it modifies cysteine residues and can change their activity."

The researchers found that certain amino acids, like cysteine, would bind to borophene in distinct locations, depending on their chiral handedness.

In each case, the edit targeted a cysteine on the corresponding protein.

One such mutation involves substitution of a glycine amino-acid residue for a cysteine residue.

From Nature

The genetic disease causes buildup of the cysteine amino acid in various organs and tissues in the body leading to damage, according to Cystinosis Research Network.

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