Immunofluorescence showing the Ago3 signals (green) in Siwi-depleted BmN4 cells (Siwi KD) and Siwi KD cells where Flag-Siwi (red) was expressed. DAPI shows the nuclei (blue). Scale bar: 10 μm. The panels on the right-hand side show high magnification images of the part indicated by the white dashed line box in the images on the left-hand side. This arrangement applies also for panel C. Bar chart indicates dot sizes of > 100 Ago3 particles in each case (Large: IntDen value > 105; Small: IntDen value < 105). A significant difference was found plus/minus Flag-Siwi expression by the Fisher's exact test (P < 0.05). 