Relative abundance of MPL , EPOR , ERBB2, and IGF1R mRNA expression determined by qRT-PCR in normal and tumor samples. Abundance is normalized to GAPDH, β-actin, and cyclophilin. Red bars are normal samples, blue bars are tumor samples. Relative abundance below 50 is below the level of detection. (A). Breast tumor taqman. (B). Lung tumor taqman. (C). Ovarian tumor taqman.