Fig. 5. Effect of brat overexpression in the eye and wing. The top left image shows a scanning electron micrograph of the head of a control fly. The top right image is the head of a fly in which brat is overexpressed in the eye. The bottom left image is of a wing from a fly carrying the dpp-Gal4 driver alone. The bottom right image is of a wing overexpressing brat under the control of dpp-Gal4, which expresses Gal4 between veins LIII and LIV (Staehling-Hampton and Hoffmann, 1994). Positions of veins are indicated in the bottom left image (I-V). Note the decrease in area between veins LIII and LIV as indicated by the bracket. All flies are female. Genotypes are w; P[w⁺; ey-Gal4]/+; +/TM6B (top left), w; P[w⁺; ey-Gal4]/+; P[w⁺; UAS-brat(5)]/+ (top right), w; P[w⁺;UAS-brat(1A)]/Sp; P[w⁺; dpp-Gal4]/+ (bottom left) and w; Sp/+; P[w⁺; dpp-Gal4]/+ (bottom right). Scale bars: 100 µm (top) and 250 µm (bottom).