Dissection and immunostaining of larval epidermis were performed as previously described.52 (link) Primary antibodies: anti-Fasciclin III (Developmental Studies Hybridoma Bank, Iowa City, IA, USA, 1:50), anti-activated Caspase-3 (Cell Signaling, Danvers, MA, USA, 1:150), and anti-GFP (Life Technologies, Basel, Switzerland, 1:500). Secondary antibodies: alexa488-conjugated anti-mouse IgG (Life Technologies, 1:1000), Cy3-conjugated goat anti-rabbit IgG (Jackson ImmunoResearch, West Grove, PA, USA, 1:1000). TUNEL labeling kit (Roche, Basel, Switzerland) was used to label apoptotic cells.
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