Fig. 3. RO-shi^DN (A-D) or RO-Dl^DN (E-H) phenocopy faf mutant eyes. (A,E) Shown are tangential sections through adult eyes of flies expressing the indicated transgenes. (B,F) Confocal images of eye discs labeled with anti-Delta are shown. Anterior is towards the right and large arrows indicate the position of the furrow. (C,D) Enlargements of clusters in B indicated by small arrows. (G,H) Enlargements of clusters in F indicated by small arrows. In C,D,G,H, numbers refer to R-cells and asterisks are ectopic R-cells. Scale bar: 20 µm in A,B,E,F; 10 µm in C,D,G,H.