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tyrosine Syllabification: ty·ro·sine
Pronunciation: /ˈtīrəˌsēn/

Definition of tyrosine in English:


A hydrophilic amino acid that is a constituent of most proteins and is important in the synthesis of some hormones.
  • Chemical formula: C6H4(OH)CH2CH(NH2)COOH
Example sentences
  • In animal cells serine, threonine and tyrosine are the amino acids subject to phosphorylation.
  • It preferentially hydrolyzes peptide bonds involving tyrosine, phenylalanine, and tryptophan.
  • The most prevalent amino acid is cysteine with other major ones including tyrosine, histidine, lysine and arginine.


Mid 19th century: formed irregularly from Greek turos 'cheese' + -ine4.

Definition of tyrosine in:
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