tyrosine

noun
ty·​ro·​sine | \ ˈtī-rə-ˌsēn How to pronounce tyrosine (audio) \

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 One reason is fewer people are smoking, and improved treatments like epidermal growth-factor receptor tyrosine-kinase inhibitor are able to target non-small cell lung cancer mutations. The Editorial Board, WSJ, "The Good News on Cancer," 14 Jan. 2021 In blood cancers and some solid tumors, two of the current therapeutic targets that have garnered much interest are the proteins BCL-2 and Bruton tyrosine kinase (BTK). Scientific American, "An Ongoing Revolution in Blood Cancer," 1 Dec. 2020 His tyrosine is part of a long chain that makes a protein, also called XIAP. Mark Johnson And Kathleen Gallagher, Milwaukee Journal Sentinel, "One in a billion: Researchers seek clues in Nicholas' DNA -- and find more than they expected.," 21 Dec. 2010 But in Nicholas, the one-letter change produces an entirely different amino acid, tyrosine. Mark Johnson And Kathleen Gallagher, Milwaukee Journal Sentinel, "One in a billion: Researchers seek clues in Nicholas' DNA -- and find more than they expected.," 21 Dec. 2010 Other cancer therapies, such as a class of drugs known as Bruton's tyrosine kinase inhibitors, may be protective and are being tested in coronavirus patients without cancer. Emily Woodruff, NOLA.com, "Having cancer and coronavirus is a dangerous combination, studies show," 6 Aug. 2020 Other types of cancer treatment, such as immunotherapies and tyrosine kinase inhibitors, were not associated with a greater risk of death among the patients. Jacqueline Howard, CNN, "How having cancer can put Covid-19 patients at higher risk of dying," 28 May 2020 The drug, known as SAR442168, works by inhibiting a cellular signal called Bruton’s tyrosine kinase (BTK), which is also the target of the best-selling cancer drug Imbruvica. Matthew Herper, STAT, "Sanofi MS drug reduced brain lesions in preliminary study," 23 Apr. 2020 The drugs target solid tumors that show specific biomarkers—namely microsatellite instability (MSI) and neurotrophic receptor tyrosine kinase (NTRK) gene fusion—irrespective of where the tumors are growing in the body. Scientific American, "The Coming Age of Molecular Medicine," 2 Oct. 2019

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

Time Traveler for tyrosine

Time Traveler

The first known use of tyrosine was in 1857

See more words from the same year

Statistics for tyrosine

Last Updated

31 Jan 2021

Cite this Entry

“Tyrosine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tyrosine. Accessed 26 Feb. 2021.

Style: MLA
MLA Chicago APA Merriam-Webster

Keep scrolling for more

More Definitions for tyrosine

tyrosine

noun
ty·​ro·​sine | \ ˈtī-rə-ˌsēn How to pronounce tyrosine (audio) \

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

Test Your Vocabulary

More Confusing Words—Quiz

  • cats on impossible timber
  • The magician ______ moved the selected card to the top of the deck.
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

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!