Scatter plot of log2 fold changes for genes differentially expressed both at transcript and protein levels (adj. p < 0.05). The color gradients indicate gene density in the regions where individual points overlap. Numbers of genes in each quadrant and the value of Pearson's coefficient of correlation, r, are reported for each graph. Solid lines represent a spline fit (r = 0.505 for genes significantly affected at both transcript and protein levels, p < 2.2 x 10-16, D) (r = 0.126, p = 0.007, E). 