Troponin is a protein, associated with actin and tropomyosin, that binds and initiates the movement of tropomyosin on actin to allow the myosin cross-bridge to touch actin and initiate contraction.

Troponin is associated with the thin filaments and can bind to the actin molecules. There is usually one troponin per 6-8 actin molecules.

Related Articles

Myosin at psychology-glossary.com■■■■■
Myosin: Myosin refers to contractile protein in the thick filament of a myofibril that contains the cross-bridge . . . Read More
Tropomyosin protein covering at psychology-glossary.com■■■■■
The Tropomyosin protein covering describes the actin binding sites that prevents the myosin cross-bridge . . . Read More
Sliding filament model at psychology-glossary.com■■■■
The Sliding filament model is a theory of muscle contraction describing the sliding of the thin filaments . . . Read More
Actin at psychology-glossary.com■■■■
. . . Read More
Akinesia at psychology-glossary.com■■
Akinesia: Akinesia refers to a Motor disturbance in which a person's muscles become rigid and movement . . . Read More
Amphiarthrodial joints at psychology-glossary.com■■
Amphiarthrodial joints: Amphiarthrodial joints refer to joints that functionally allow only a very slight . . . Read More
Passive insufficiency at psychology-glossary.com■■
Passive insufficiency: Passive insufficiency refers to the state reached when an opposing muscle becomes . . . Read More
Physical activity at psychology-glossary.com■■
Physical activity: Physical activity refers to any bodily movement produced by contraction of the skeletal . . . Read More
Myoclonus at psychology-glossary.com■■
Myoclonus: Myoclonus refers to a neurologic movement disorder characterized by brief, involuntary, twitching . . . Read More
Transition at psychology-glossary.com■■
Transition: Transition refers to the initial movement of the head of the fetus into the birth canal. . . . Read More