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Fig. 8. Overexpression of CG31052, but not CG10806, affects both Na+ and K+ handling in the Drosophila renal tubule. Transgenic tubules were dissected and secreted fluid collected over 1 hour under resting conditions. Na+ and K+ were measured by flame photometry, and are compared with the actinGAL4 parental control. Data are expressed as mean ± s.e.m. of four replicates. Where error bars are not shown, they are too small to be visible. Significant changes (P<0.05) relative to parental controls are marked with an asterisk.