tyrosine

noun
ty·ro·sine | \ˈtī-rə-ˌsēn \

Definition of tyrosine 

: a phenolic amino acid C9H11NO3 that is a precursor of several important substances (such as epinephrine and melanin)

Examples of tyrosine in a Sentence

Recent Examples on the Web

Choanoflagellates have genes for tyrosine kinases, enzymes that, in complex animals, help control the functions of specialized cells, such as insulin secretion in the pancreas. Elizabeth Pennisi, Science | AAAS, "The momentous transition to multicellular life may not have been so hard after all," 28 June 2018 Both monoclonal antibodies and tyrosine kinases now provide the basis for many new medicines coming to market. Fred D. Ledley, STAT, "30 years is too long to wait for new medicines. There are ways to speed up drug development," 6 June 2018 Hunter made his reputation with the 1979 discovery of how enzymes called tyrosine kinases can cause cancer. Bradley J. Fikes, sandiegouniontribune.com, "Superstar cancer researcher Tony Hunter of Salk Institute wins award, makes new finding," 4 Apr. 2018 But tyrosine is just one of the 20 amino acids normally found in protein. Bradley J. Fikes, sandiegouniontribune.com, "Superstar cancer researcher Tony Hunter of Salk Institute wins award, makes new finding," 4 Apr. 2018 The class of cancer drugs that block phosphorylation activity are called tyrosine kinase inhibitors. Bradley J. Fikes, sandiegouniontribune.com, "Superstar cancer researcher Tony Hunter of Salk Institute wins award, makes new finding," 4 Apr. 2018 Plants modify tyrosine by adding other molecules to create an enormous array of useful substances. Veronique Greenwood, New York Times, "How Beets Became Beet-Red," 24 Oct. 2017 Such tyrosine kinase inhibitors constitute a large class of cancer drugs, made possible by the research of Salk Institute scientist Tony Hunter. Bradley J. Fikes, sandiegouniontribune.com, "UCSD cancer clinical trial gets $18.2 million," 4 Sep. 2017 Ibrutinib inhibits Bruton's tyrosine kinase, an enzyme used in B cell development. Bradley J. Fikes, sandiegouniontribune.com, "UCSD cancer clinical trial gets $18.2 million," 4 Sep. 2017

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

See More

First Known Use of tyrosine

1857, in the meaning defined above

History and Etymology for tyrosine

International Scientific Vocabulary, irregular from Greek tyros cheese — more at butter

Keep scrolling for more

Learn More about tyrosine

Dictionary Entries near tyrosine

Tyrone

tyronic

tyrosinase

tyrosine

tyrothricin

Tyrrheni

Tyrrhenian

Statistics for tyrosine

Look-up Popularity

Time Traveler for tyrosine

The first known use of tyrosine was in 1857

See more words from the same year

Keep scrolling for more

More Definitions for tyrosine

tyrosine

noun
ty·ro·sine | \ˈtī-rə-ˌsēn \

Medical Definition of tyrosine 

: a phenolic amino acid C9H11NO3 that is a precursor of several important substances (as epinephrine and melanin) abbreviation Tyr

More from Merriam-Webster on tyrosine

Britannica.com: Encyclopedia article about tyrosine

Comments on tyrosine

What made you want to look up tyrosine? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to reject or criticize sharply

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!