Comparison of differential expression of genes in parental cells versus reference cDNA synthesized from universal RNA (left) and all tumors versus parental cell lines (right). Genes differentially expressed in the parental cells relative to the reference cDNA were analyzed by a 2-way ANOVA (Pcorr < .001). A subset of the differentially expressed genes is shown. The corresponding cognate tumors with differential expression at a 99.9% confidence level by ANOVA analysis of tumors vs parental cell line data are shown. The heat maps indicate relative fold-induction or suppression in a linear color-encoded scale shown at the bottom. Mean ratios are indicated by X, C = colon, B = breast, L = lung, P = prostate, O = ovary.