Fig. 4.
Scatter plots of expression levels for all microarray experiments. The normalized control intensity is plotted against the normalized test intensity on a log scale. Genes with P values >0.05 are colored in gray. Genes with P values <0.05 are green if the induction is ³ 2-fold, red if repression is ³ 2-fold, and blue if the ratio is <2-fold.