Fig. 4. Antagonism between Vg and Hth requires Dpp signaling. In all panels, Hth staining is in blue, Vg is in red, and clones are marked by the absence of GFP or CD2 in green. (A-D) vgBE::flp-induced Med^adro M+ clone in the wing pouch. (B-D) Magnification of the region denoted by the white box in A. hth is de-repressed even though vg is still highly expressed in the clone (white outline). (E-H) brk^– clones, induced by heat shock during the second instar. The yellow arrowhead points to a lateral DH clone, which loses hth expression and maintains vg expression. The white dotted line marks the epithelial fold between the DH and PH.