Figure 4.

Simplified one-dimensional model of the actin-myosin flow. If the two-dimensional effects are neglected in the rectangular domain with uniform adhesion and myosin linearly biased to the rear (darker shading corresponds to higher myosin), then the anterior-posterior and lateral distributions of the flow velocities can be found analytically. (Left/right bottom line plots) Flow rates from the left to the right side and from the rear to the front, respectively. The flow rate is in units of the maximum rate at the side; the unit of distance is the half-width of the lamellipodial domain.