FIGURE 7.

Tracks of HeLa cells moving into a wound. A scratch assay was used to follow the paths of individual HeLa cells moving into a wound in the absence (A) or presence of 1 nm (B) and 70 nm (C) nocodazole. The cells were photographed at 15-min intervals, and the nuclear coordinates are plotted as circles. Shaded circles indicate that multiple intervals (rest intervals) passed before movement was detected. Circles were omitted, and the paths were indicated with different colors in C because of extensive overlap.