Thick Filament:
1. It is made up of protein myosin only.
2. It lies only in A-band.
3. It is bisected by a proteinaceous line called M-line.
ADVERTISEMENTS:
Thin Filament:
1. It is made up of proteins – actin, tropomyosin and troponin.
2. It lies both in A and I band.
3. It is bisected by a proteinacious line called Z-line.