Fig. 3. Response of hh-lacZ to gro loss of function in a ci^Ce2/+ background. Df(3R)Espl22 clones are marked by increased GFP, as in Fig. 1A-C. (A',B') Red channel only (hh-lacZ). (A'',B'') Green channel only (GFP). Only clones near the DV boundary show good hh-lacZ derepression (white arrows). Type I clones (blue arrows), which would normally express high levels of hh-lacZ, show weak or no expression, whereas type III clones (arrowheads) are fully repressed.