Fig. 3

One cell line (U251) exposed to two different signals. a Relative proliferation of U251 cells exposed to signals (a) 14.1tAM and (b) 7-21sFM, 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 < 0.01, ***: p < 0.001. Relative proliferation of cells treated with 1 nM Calyculin A (as positive control for inhibition) was of 0.008 ± 0.044 (not shown in the plot)