Confocal imaging and time-course imaging were done as previously described (Rafalska-Metcalf et al., 2010 (link); Newhart et al., 2013b (link)). Pearson’s r was calculated using SimplePCI software (Hamamatsu, Middlesex, NJ) by manually selecting the transgene array site with the region of interest (ROI) function. Intensity profiles for merged pictures were also generated using SimplePCI software.