Figure 3.

Motility is developmentally regulated in regA⁻ cells (B) as it is in parental Ax4 cells (A). Cells were removed from the respective developing cultures at the noted intervals, were dispersed on the wall of a perfusion chamber, and average instantaneous velocity were measured over a 10-min period. The mean instantaneous velocity at each time point was computed from the average instantaneous velocities of 20 amoebae at each time point.