ly·​sine | \ ˈlī-ˌsēn How to pronounce lysine (audio) \

Definition of lysine

: a crystalline essential amino acid C6H14N2O2 obtained from the hydrolysis of various proteins

Examples of lysine in a Sentence

Recent Examples on the Web This is a substitution of lysine for glutamine at position 452 (L452Q). William A. Haseltine, Forbes, 22 Apr. 2022 Asparagine to lysine is a major change in charge, from neutral to positive. William A. Haseltine, Forbes, 22 Oct. 2021 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 One ingredient growing in popularity among skincare brands is tranexamic acid, a gentle-on-skin derivative of lysine (itself an amino acid that helps boost collagen production). Adam Hurly, Robb Report, 26 Aug. 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Country, 4 July 2021 The mutation is denominated E484K, meaning that the amino acid, glutamic acid (code letter E), has been replaced by another, lysine (code letter K), in position 484 of the genetic sequence of the spike protein. Lawrence Wright, The New Yorker, 21 Jan. 2021 Lysulin’s supplement contains vitamin C, zinc and lysine — all of which are available over the counter, though Lysulin has patented its particular blend. San Diego Union-Tribune, 19 Aug. 2020 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lysine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of lysine

1892, in the meaning defined above

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Cite this Entry

“Lysine.” Dictionary, Merriam-Webster, Accessed 16 Aug. 2022.

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More Definitions for lysine


ly·​sine | \ ˈlī-ˌsēn How to pronounce lysine (audio) \

Medical Definition of lysine

: a crystalline essential amino acid C6H14N2O2 obtained from the hydrolysis of various proteins abbreviation Lys

More from Merriam-Webster on lysine Encyclopedia article about lysine


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