tyrosine

[ tahy-ruh-seen, -sin, tir-uh- ]

noun

, Biochemistry.

1. a crystalline amino acid, HOC 6 H 4 CH 2 CH(NH 2 )COOH, abundant in ripe cheese, that acts as a precursor of norepinephrine and dopamine. : Tyr; : Y

tyrosine

/ ˈtɪrə-; ˈtaɪrəˌsiːn; -sɪn /

noun

1. an aromatic nonessential amino acid; a component of proteins. It is a metabolic precursor of thyroxine, the pigment melanin, and other biologically important compounds

tyrosine

/ tī′rə-sēn′ /

1. A nonessential amino acid. Chemical formula: C 9 H 11 NO 3 .
2. See more at amino acid

Word History and Origins

Origin of tyrosine¹

1855–60; < Greek tȳrós cheese + -ine ²

Word History and Origins

Origin of tyrosine¹

C19: from Greek turos cheese + -ine ²

Example Sentences

Both the tyrosine and tryptophane may be either in the free state or in combination as polypeptid or peptone.

From Project Gutenberg

This reaction is caused by the tyrosine group (p. oxy α amido phenyl-propionic acid).

From Project Gutenberg