Fig. 4

Two cell lines exposed to the same signal. Relative proliferation of (a) U251 and (b) MDA-MB-231 cells to the 7.8tAM signal, for each combination of DC and AC fields. c Average over all DC field values: for each AC field, the average and standard error of the mean (SEM) of a total of 30 wells is shown (3 independent experiments, 10 wells (columns 2 through 11) for each AC field, per experiment). Bars are ± SEM for 3 independent experiments. *: p < 0.05, ***: p < 0.001. Relative proliferation of U251 cells treated with 1 nM Calyculin A (as positive control for inhibition) was 0.025 ± 0.039, and that of MDA-MB-231 treated with 10 nM was 0.064 ± 0.044 (not shown in the plot)