Major protein in thick filaments of skeletal muscle fibre is?

Myosin

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Actin

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Tropomyosin

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Troponin

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Solution

The correct option is A Myosin
The main contractile components of a muscle fibre include:
Thick filaments - The major protein of a thick filament is myosin.
Thin filaments - The major proteins of a thin filament include actin, as well as troponin and tropomyosin. Hence, Major protein in thick filaments of skeletal muscle fibre is myosin.
So, the correct answer is 'myosin'.

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