threonine

noun

thre·​o·​nine ˈthrē-ə-ˌnēn How to pronounce threonine (audio)
: a colorless crystalline essential amino acid C4H9NO3

Examples of threonine in a Sentence

Recent Examples on the Web High-quality protein is any protein that contains all of the nine essential amino acids (histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan and valine) that our bodies don’t make on their own. USA TODAY, 2 July 2023 Repeats with a lot of proline, threonine and serine transform a typical protein to a mucin because of the polypeptide structure that is formed. Coren Walters-Stewart, Discover Magazine, 18 Oct. 2022 The nine essential amino acids are: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. Amber Smith, Discover Magazine, 16 Nov. 2022 In both types, a protein backbone is studded with strings of sugars called glycans that are linked to either the amino acid asparagine (N-Glycans) or to the amino acids serine and threonine (O-Glycans). Diana Kwon, Discover Magazine, 9 July 2019 For example, the base series ACG encode the amino acid threonine. John Timmer, Ars Technica, 11 June 2022 These essential amino acids are: histidine, isoleucine, leucine, lysine, methionine, phenyalinine, threonine, tryptophan and valine. Alyssa Jung, Good Housekeeping, 5 Oct. 2021 This insertion added the peptide GLTSKRN (glycine-leucine-threonine-serine-lysine-arginine-asparagine) between Spike protein positions 214 and 215. William A. Haseltine, Forbes, 28 Sep. 2021 The key dietary nutrients for collagen production include chromium, copper and zinc, Omega-3, silica, sulfur, vitamin C, iron, threonine, proline, and lysine—all of which are found in The Beauty Chef’s Collagen Inner Beauty Boost. April Long, Town & Country, 4 July 2021

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'threonine.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

probably from threonic acid (C4H8O5)

First Known Use

1936, in the meaning defined above

Time Traveler
The first known use of threonine was in 1936

Dictionary Entries Near threonine

Cite this Entry

“Threonine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/threonine. Accessed 19 Apr. 2024.

Medical Definition

threonine

noun
thre·​o·​nine ˈthrē-ə-ˌnēn How to pronounce threonine (audio)
: a colorless crystalline essential amino acid C4H9NO3 that is found in various proteins
abbreviation Thr

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