Overlaps of the lists of genes regulated by EGF in keratinocytes with those regulated in other cell types. The overlaps with p-values better than 10-10 are marked with gray. Downward arrows mark strong overlaps in both the induced and the suppressed gene lists. Upward arrows mark the antiparallel overlaps, i.e., genes induced in keratinocytes, but suppressed in MCF7 cells. The short arrows point to significant overlaps in the induced genes only, but not in the suppressed ones.