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cysteine

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cys⋅te⋅ine

[sis-tee-een, -in]
–noun Biochemistry.
a crystalline amino acid, C3H7O2NS, a component of nearly all proteins, obtained by the reduction of cystine. Abbreviation: Cys; Symbol: C

Origin:
1880–85; alter. of cystine


cys⋅te⋅in⋅ic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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cys·te·ine   (sĭs'tə-ēn', -ĭn, -tē-)   
n.  An amino acid, C3H7O2NS, derived from cystine and found in most proteins.

[Alteration of cystine.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: cys·teine
Pronunciation: 'sis-t&-"En
Function: noun
: a sulfur-containing amino acid C3H7NO2Soccurring in many proteins and glutathione and readily oxidizable to cystine—abbreviation Cys
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

cysteine cys·te·ine (sĭs'tē-ēn', -ĭn, sĭ-stē'ĭn)
n.
Abbr. Cys
An alpha-amino acid found in most proteins and especially abundant in keratin.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
cysteine   (sĭs'tə-ēn')  Pronunciation Key 
A nonessential amino acid. Chemical formula: C3H7NO2S. See more at amino acid.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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