Fig. 5
Expression of enhancer-Gal4 strains in the larval brain. A The genomic organization of the DRx locus is shown together with the location of fragments from the upstream and intronic regions of the DRx locus used to test enhancer activities in the respective Gal4 strains. B-J Views of right hemispheres of Drosophila L3 larval brains. An anti-DRx antibody was used to visualize the nuclear DRx expression pattern in green, and enhancer-Gal4-driven UAS-H2B-mRFP1 expression was used to visualize the patterns generated by the various enhancers in red. The Gal4 strain numbers are indicated; yellow arrowheads indicate important regions showing coexpression of DRx and the fluorescence marker, and red arrowheads show regions where only the enhancer expression is visible. dIPC, dorsal inner proliferation centre; DL, dorsolateral lineages; DM, dorsomedial lineages; LP, lobula plate; MB, mushroom body; M, medulla. (Scale bars: 50 μm)