GMR-Grim, UAS-p35, and Gal4 drivers including ptc-Gal4, nub-Gal4, GMR-Gal4, en-Gal4, and act-Gal4 were obtained from Bloomington Drosophila Stock Center (USA). UAS-ana3 RNAi line was obtained from VDRC (V101280). Ubq-ana3-GFP, UAS-ana3-GFP, and ana3SH0558 flies were kindly provided by Jordan W. Raff. UAS-sona lines were generated in our laboratory (Kim et al., 2016 (link)). Flies were incubated at 25°C unless otherwise indicated.