In A-deficient medium inside a Rh1-driven experiment. For heat-shock driven expression, newly eclosed adult fly flies have been incubated at 37 for 45 min per day before preparation. Within 0 days soon after eclosion, flies had been frozen with liquid nitrogen and stored at -80 . The heads were collected by sieving in liquid nitrogen, ground to powder and homogenized in buffer (50 mM Tris-Cl, 500 mM NaCl, pH 7.5) containing 1:200 Protein inhibitor cocktail VI (Calbiochem, San Diego, CA, UAS) employing BioMasher II (Wako Pure Chemical, Osaka, Japan) with motor drive. Debris was removed by centrifugation at 950 for 5 min plus the membrane was precipitated by centrifugation at 21,500 for 15 min. Around 30 l of membrane pellet have been solubilized by 130 l of 1 CHAPS and placed on ice for 1 hr, plus the insoluble membrane was removed by centrifugation at 21,500 for 30 min. The extract was diluted fivefold by the buffer and 50 l of Anti-GFP-Magnetic beads (MBL, Nagoya, Japan) have been added and mixed by mild rotation for 18 hr. The magnetic beads were rinsed with 2100 l of 0.1 CHAPS in buffer as well as the bound protein was extracted by incubation in 20 l SDS-PAGE Sampling Buffer (BioRad) for 5 min at area temperature and an equal volume of Sampling Buffer with 2-mercaptoethanol was then added. The extracts were heat denatured for five min at 37 . SDS-PAGE and immunoblotting was performed as described above.Electron microscopyElectron microscopy was performed as described previously (Satoh et al., 1997). Samples were observed on a JEM1200 or JEM1400 electron microscope (JEOL, Tokyo, Japan).Quantification of relative expression of mRNA of Rh1, TRP, and Arr2 normalized by Act5CWhole-eye mutant clones have been generated using the FRT/GMR-hid strategy (Stowers and Schwarz, 1999). Each eyes were dissected from two adult flies per sample and cDNA was reverse-transcribed utilizing SuperPrep Cell Lysis and RT Kit for qPCR (Toyobo, Osaka, Japan) according to the manufacturer’s guidelines. Eyes with whole-eye clones of FRT40A had been utilised as a manage to get the relative regular curves. qPCR reactions were performed making use of the StepOne real-time PCR technique (Life Technologies) and KOD SYBR qPCR Mix (Toyobo, Osaka, Japan), in accordance with the manufacturers’ instructions. PCR situation was 98 for two min, followed by 40 cycles at 98 for 15 s, 55 for 15 s, and 68 for 45 s, plus a melt curve stage of 95 for 30 s, 60 for 1 min, and 0.3 /s increments to 98 ,Satoh et al. eLife 2015;four:e06306. DOI: ten.7554/eLife.18 ofResearch 77086-22-7 custom synthesis articleCell biologywith primers of Rh1: (ninaE-qF1:5-GTGGACACCATACCTGGTC-3 and ninaE-qR1:5-GCGATATTTCGGATGGCTG-3), Arr2: (Arr2-qF1:5-AAGGATCGCCATGGTATCG-3 and Arr2-qR1:5TACGAGATGACAATACCACAGG-3), TRP: (Trp-qF2:5-GAATACACGGAGATGCGTC-3 and Trp-qF2:5-CTCGAGTTCCATGGATGTG-3), Act5C: (5-GCTTGTCTGGGCAAGAGGAT-3 and 5-CTGGAACCACACAACATGCG-3). The relative expression levels were normalized by Act5C.AcknowledgementsWe thank Drs U Tepass, C Montell, C Zuker, H Ryoo, and J Han who kindly offered fly stocks and reagents. We also thank the Bloomington Stock Center along with the Drosophila Genetic Resource Center on the Kyoto Institute of OSMI-2 Inhibitor Technologies for fly stocks. This study was supported by grants in the Naito Foundation (25-040920), the Novartis Foundation (25-050421), the Hayashi Memorial Foundation for Female All-natural Scientists (25-051022), PRESTO (25-J-J4215), and KAKENHI (21687005, 21113510, and 23113712) to ASK. This study was also supported by grants in the Worldwide Centers of Excellence.