A calcium-regulated protein, composed of three subunits, that is found in skeletal and cardiac muscle and regulates contraction by interacting with tropomyosin to control the binding of myosin to actin. Blood troponin levels are a biomarker for muscle damage, as in myocardial infarction.
Origin of troponintropo(myosin) -in
- (biochemistry, medicine) A complex of three regulatory proteins that is integral to muscle contraction in skeletal and cardiac muscle, or any member of this complex. The level of troponin in the blood is often used as an indicator of heart damage.
From tropomyosin. Coined by the Japanese researcher Setsuro Ebashi in 1963.