The authors point out that, in low concentrations of ATP, when the myosin heads both remain ... for the swinging cross-bridge model of muscle contraction proposed in 1969. Although muscle ...

When muscle cells are viewed under the microscope, one can see that they contain a striped pattern (striations). This pattern is formed by a series of basic units called sarcomeres that are ...

When a cardiac muscle cell contracts, the myosin filament pulls the actin filaments toward each other, which causes the cell to shrink. The cell uses ATP to power this contraction. A single myosin ...