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lysine

American

[lahy-seen, -sin] / ˈlaɪ sin, -sɪn /

noun

Biochemistry.

a crystalline, basic, amino acid, H 2 N(CH2 ) 4 CH(NH2 )COOH, produced chiefly from many proteins by hydrolysis, essential in the nutrition of humans and animals. Lys; K

lysine British

/ ˈlaɪsiːn, -sɪn /

noun

an essential amino acid that occurs in 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

lysine Scientific

/ lī′sēn′ /

An essential amino acid. Chemical formula: C ₆ H ₁₄ N ₂ O ₂ .
See more at amino acid

Etymology

Origin of lysine

First recorded in 1890–95; lys- + -ine ²

Example Sentences

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See Examples For:

lysine

TAA specified lysine, while TAG specified glutamic acid.

From Science Daily ● Oct. 8, 2026

TAA specifies lysine, while TAG specifies glutamic acid.

From Science Daily ● May 7, 2026

Plants use an amino acid called lysine for many things, including as a part of their detection and response to pests.

From Salon ● Mar. 5, 2025

The nonsticky, vegan lip treatments are meant to heal lips via shea butter, jojoba oil and lysine.

From Los Angeles Times ● Mar. 14, 2024

Beans have both lysine and tryptophan, but not the amino acids cysteine and methionine, which are provided by maize.

From "1491" by Charles C. Mann

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023