The effect of overexpression of +- or mi-MITF on the luciferase activity in FMA/3 cells. The luciferase gene under the control of the normal, deleted, or mutated MMCP-5 promoter was transfected to the FMA/3 cells overexpressing +- or mi-MITF or to the FMA/3 cells containing the retroviral vector (pM5Gneo) alone. The data represent the mean ± SE of three experiments. In some cases, the SE was too small to be shown by the bars.