[ser-een, -in, seer-]
noun Biochemistry.
a crystalline amino acid, HOCH 2 CH(NH 2 )COOH, found in many proteins and obtained by the hydrolysis of sericin, the protein constituting silk gum. Abbreviation: Ser; Symbol: S

1875–80; ser(um) + -ine2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
serine (ˈsɛriːn, ˈsɪəriːn, -rɪn)
a sweet-tasting amino acid that is synthesized in the body and is involved in the synthesis of cysteine; 2-amino-3-hydroxypropanoic acid. Formula: CH2(OH)CH(NH2)COOH
[C19: from sericin + -ine²]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

serine ser·ine (sěr'ēn')
Abbr. Ser
An amino acid that is a common constituent of many proteins.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
serine   (sěr'ēn')  Pronunciation Key 
A nonessential amino acid. Chemical formula: C3H7NO3. See more at amino acid.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences for serine
There are three amino acids encoded by six different codons serine, leucine, arginine.
Serine proteases act by cleaving other proteins at specific sites.
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