Myofibrils are

The dark bands in a myofibril are due to overlapping of

The dark bands in a myofibril are due to accumulation of

The dark bands in a myofibril are due to overlapping of

The thick filaments in'the A-band of a myofibril are held together in the middle of this band by a thin fibrous membrane called

The thick filaments ih'the A-band of a myofibril are held together in the middle of this band by a thin fibrous membrane called

For muscle contraction, in myofibrils the formation, of a protein is essential, such protein discovered by