Cardiac muscle complex, illustration - Stock-Grafiken

Cardiac muscle complex. Illustration showing the components of human cardiac muscle. They are; an actin pentamer (mid blue), a tropomyosin dimer (light blue) and a myosin head (dark blue). Tropomyosin is a protein that regulates muscle contraction by regulating interactions between actin and myosin. When actin and myosin are bound the muscle is contracted. Release of ADP (adenosine diphosphate, red) releases the myosin head from actin