The panel shows the estrogen-receptor (ESR1) pathway, which is significantly enriched for genes regulated by ATRA in Lum tumors. The green arrows indicate up-regulatory or stimulating interactions, while the red arrows indicate down-regulatory or inhibitory interactions. The gray arrows indicate unknown types of interactions. The red and blue dots above the protein symbols indicate the effect of ATRA in Lum tumors (red = up-regulation; blue = down-regulation). 