Question

Thin filament of myofibril contains 2 'F' actins and two other proteins namely _____ and _____. Fill in the blank.

Answer 1

tropomyosin and troponin

Answer 2

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

Troponin is attached to the protein tropomyosin and it also lies in the groove between actin filaments in muscle tissue.

Tropomyosin blocks the attachment site for the myosin crossbridge, in a relaxed muscle and thus prevents from contraction.