Figure 4.

Intersection of significant genes. Improved intersection of significant genes. After our screening process, the number of transcripts which are up (a) and down (b) regulated in stem cells for the three studies. Notice that now most genes in each study also appear at least in one other study (81% Bhattacharya, 85% Sperger, 94% Sato, about 11% expected by chance), with a very important fraction common to all three (about 3 genes expected by chance at the intersection).