Thin filament of myofibril contains 2 F actins and two other proteins namely .......... and ...........

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Solution

A thin filament of myofibril contains 2 ‘F’ actins and two other proteins, namely troponin and tropomyosin. Tropomyosin and troponin regulate muscle contraction. Troponin binds to the calcium ions and removes the tropomyosin from the actin myosin binding site which allows the muscle contraction. When the calcium ions are not attached to the troponin, it pushes the tropomyosin to block the binding site and the muscle relaxes.

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