Figure 6: Effect of ionizing radiation on expression of stemness genes in melanoma. Graphic representation of relative normalized expression rates (means and standard deviations) of IR-regulated stemness genes. A375 (upper panel) and SAN (lower panel) melanoma cells, were irradiated or not with a 4 Gy dose, and harvested after 16 h and 36 h. Unirradiated sample was arbitrarily used as reference sample (expression=1). GAPDH was used as internal control of amplification.