troponin

[ troh-puh-nin, trop-uh- ]

noun

, Biochemistry.

1. a protein of muscle tissue that binds calcium ions and is involved in contraction.

troponin

/ trō′pə-nĭn,trŏp′ə- /

1. One of the proteins that make up the thin filaments of muscle tissue and that regulate muscle contraction and relaxation. Troponin occurs in three forms bound together in a complex. One of the three forms is a receptor of calcium ions that induces structural changes that allow the actin in the thin filaments to interact with myosin, causing contraction.

Word History and Origins

Origin of troponin¹

1965–70; tropo(myosin) ( tropo-, myosin ) + -n- (of uncertain origin) + -in ²

Example Sentences

Eckle has used light therapy with patients after surgery and seen positive results including lower levels of troponin, a key protein whose elevation can signal a heart attack or stroke.

From Science Daily

The thin filament consists of F-actin, troponin, tropomyosin, and nebulin.

From Science Daily

Chronic heart problems and other preexisting conditions might be to blame in 18 cases, but for the other 22 cases—2.8% of participants, women and men—Müller believes the vaccine caused troponin levels to rise.

From Science Magazine

The good news: In both studies, troponin levels quickly fell to normal.

From Science Magazine

None met the criteria for myocarditis but 40 had high levels of troponin, a molecule that can indicate damage to the heart muscle.

From Science Magazine