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lysine Line breaks: ly¦sine
Pronunciation: /ˈlʌɪsiːn/

Definition of lysine in English:


[mass noun] Biochemistry
A basic amino acid which is a constituent of most proteins. It is an essential nutrient in the diet of vertebrates.
Example sentences
  • Hydroxyl radicals oxidize amino acids such as lysine, serine, arginine, and proline.
  • Arginine appears to counteract the hypercholesterolemic effect of the essential amino acids lysine and methionine.
  • The most prevalent amino acid is cysteine with other major ones including tyrosine, histidine, lysine and arginine.


Late 19th century: from German Lysin, based on lysis.

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