Luciferase activity in FMA/3 cells under the control of the normal, deleted, or mutated MMCP-5 promoter. The value of the luciferase activity was divided by the value obtained with the reporter plasmid starting at nt −178 and is shown as the relative luciferase activity. The data represent the mean ± standard error (SE) of three experiments. In some cases, the SE was too small to be shown by the bars.