Figure 8

Gene-wise main and interaction effects of transcription levels for a two-factor model. Interaction plots for genes AT1G69530 (A) and AT1G61520 (B). The black lines represent the observed log₂ expression for the probes at the different combinations of the two factor levels. The dotted grey line is corresponding the mean observed log₂ expression over all the probes in the region. The orange lines are the probe-wise fitted log₂ expression values, while the purple line gives the corresponding mean fitted log₂ expression values for all the probes in the region.