Fig. 4

Global transcript abundance changes in response to oxidative stress (a) or to combined nitrogen starvation (b) represented by a colour-coded Heatmap. RNAs were extracted from WT strain or the pkn22 mutant (WT#pkn22) or the pkn22 mutant harbouring the pRL25 plasmid expressing the pkn22 gene (WT#pkn22/petE-pkn22). Genes were hierarchically clustered according to their pattern of expression. Genes displaying a change in transcript level of at least 2-fold in at least one of the tested strains were represented. Values are expressed in log2 scale