Fig. 7. The iplA gene is not required for electrotaxis. (A) iplA-null cells and AX2 cells migrate towards the cathode with similar direction of cell migration. (B) The deletion of iplA does not significantly affect the trajectory speeds. (C) Displacement speeds increased significantly in both types of cells following field stimulation, but the increase of that of iplA-null cells was significantly less than that of AX2 cells (P=0.004; data are the average of 21-33 cells from three independent experiments).