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GFP-tagged Sav was expressed under the control of the ubiquitin promoter (ubi-GFP::Sav) and analysed in 3rd instar larval wing discs expressing hh-GAL4 alone (left panel) or UAS-herc4 in the posterior compartment (hh>herc4). White dotted lines denote the border between the anterior and posterior compartments of the wing. Anti-Ci staining marks the anterior compartment. Scale bar = 100μm.
