O. Quantification of luciferase activity of midguts of Drosophila carrying esgts-GAL4-driven expression of lacZ cDNA, Las RNAi, or Las RNAi and EGFR-DN. Error bars show the SD of six independent experiments. Data information: Error bars represent SDs. The statistical tests used in other panels were student's t-tests. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001, and non-significant (NS) represents p > 0.05. 