The perturbations included activation (e.g., using a retrovirus to overexpress an oncogene) or silencing (e.g., an RNA interference experiment), and targeted many genes that are important in cancer, including breast cancer (e.g., ERBB2, TP53, MYC, AKT, RB1, CCND1, etc., see Additional file 1: Table S1). This evidence concerns the gene AKT1 and cancer.