troponin

noun
tro·​po·​nin | \ ˈtrō-pə-nən How to pronounce troponin (audio) , ˈträ-, -ˌnin \

Definition of troponin

: a protein of muscle that together with tropomyosin forms a regulatory protein complex controlling the interaction of actin and myosin and that when combined with calcium ions permits muscular contraction

Examples of troponin in a Sentence

Recent Examples on the Web Denise pointed out that the level of troponin, a blood protein that can be measured to gauge whether a person has had a heart attack or may be in cardiac distress, was extremely elevated when his blood was drawn on the night of March 28. Kristen Jordan Shamus, Detroit Free Press, "The painful truth: A wife gets answers from a nurse who saw her husband die," 28 June 2020 Cardiac injury is defined by an elevation of a protein called troponin that can be measured in the blood, according to the American Heart Association. Jacqueline Howard, CNN, "Cardiac injury among hospitalized Covid-19 patients tied to higher risk of death in new study," 26 Mar. 2020 The study found there is an increase in troponins, a protein found in blood that can often signal heart injury, in participants who spent 10 hours or more a day sitting. Elizabeth Varnell, Vogue, "Here’s Why Sitting at a Desk All Day Is Harmful to Your Heart," 6 Jan. 2018 A blood test revealed my levels of a protein called troponin were off…something was wrong, but the doctors couldn't diagnose it. Michelle Konstantinovsky, Marie Claire, "On Having a Baby and a Heart Attack: Why You Might Be at Risk for This Life-Threatening Disease," 2 Mar. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'troponin.' 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 troponin

1966, in the meaning defined above

History and Etymology for troponin

by shortening & alteration from tropomyosin

Note: The name was apparently first used in print in a letter by the Japanese biochemist Setsuro Ebashi (1922-2006) and coworker Ayako Kodama, "Interaction of Troponin with F-Actin in the Presence of Tropomyosin," Journal of Biochemistry (Japanese Biochemical Society), vol. 59, issue 4 (April, 1966), p. 425.

Keep scrolling for more

Learn More about troponin

Time Traveler for troponin

Time Traveler

The first known use of troponin was in 1966

See more words from the same year

Statistics for troponin

Last Updated

2 Jul 2020

Cite this Entry

“Troponin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/troponin. Accessed 7 Aug. 2020.

Keep scrolling for more

More Definitions for troponin

troponin

noun
tro·​po·​nin | \ ˈtrōp-ə-nən How to pronounce troponin (audio) , ˈträp- How to pronounce troponin (audio) , -ˌnin \

Medical Definition of troponin

: a protein of muscle that together with tropomyosin forms a regulatory protein complex controlling the interaction of actin and myosin and that when combined with calcium ions permits muscular contraction

More from Merriam-Webster on troponin

Britannica.com: Encyclopedia article about troponin

Comments on troponin

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

WORD OF THE DAY

Test Your Vocabulary

Original Meanings Quiz

  • rembrandt painting a young scholar and his tutor
  • Which of the following is the earliest known sense of the word awe?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Citation

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!