Figure 4.

Signal distribution for the set of constant genes, compared to the overall signal distribution. This plot compares the density of the overall distribution of expression in the microarray (black) to the one for the constant genes set (red). As intended, the distribution range of the constant genes set is narrower and centred on the signal range of interest. Both density curves are for the second time point (2 hours after irradiation) of the first replicate.