Immunostainings with Sf21 cells and third instar larvae were performed as described previously [47 (link), 48 (link)]. The antibodies used in this study were as follows: primary antibodies: rabbit anti-HA (1:100, Sigma) and mouse anti-Calnexin (1:200, DSHB, 99A-6-2-1); secondary antibodies: goat anti-mouse-Cy3 (1:200, Dianova), goat anti-rabbit-AF633 (1:100, Invitrogen). Confocal images were captured with a laser scanning microscope (Zeiss LSM800). Image processing was done with Fiji and Affinity Photo (Serif).
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