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threonine

American  
[three-uh-neen, -nin] / ˈθri əˌnin, -nɪn /

noun

Biochemistry.
  1. an essential amino acid, CH 3 CHOHCH(NH2 )COOH, obtained by the hydrolysis of proteins. Thr; T


threonine British  
/ ˈθriːəˌniːn, -nɪn /

noun

  1. an essential amino acid that occurs in certain proteins

"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

threonine Scientific  
/ thrēə-nēn′ /
  1. An essential amino acid. Chemical formula: C 4 H 9 NO 3 .

  2. See more at amino acid


Etymology

Origin of threonine

1925–30; threon- (alteration of Greek erythrón, neuter of erythrós red; see erythro-) + -ine 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Amino acids such as valine, methionine, and alanine are nonpolar or hydrophobic in nature, while amino acids such as serine, threonine, and cysteine are polar and have hydrophilic side chains.

From Textbooks • Jun. 9, 2022

A-kinase regulates many vital metabolic pathways: It phosphorylates serine and threonine residues of its target proteins, activating them in the process.

From Textbooks • Jun. 9, 2022

A phosphatase phosphorylates serine, threonine, and tyrosine residues.

From Textbooks • Jun. 9, 2022

What property enables the residues of the amino acids serine, threonine, and tyrosine to be phosphorylated?

From Textbooks • Jun. 9, 2022

Metabolism experts have tried to prevent this in Brantner's case by adding two amino acids, lysine and threonine, to his diet.

From Time Magazine Archive

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