Fig. 7. GAL80 blocks GAL4-dependent activation in EH cells. (A) GFP fluorescence in CNS of third instar larva carrying EHups-GAL4 and UAS-GFP transgenes. Bright field image is visualized simultaneously for orientation. Arrow indicates one of the two EH cells, one brain lobe (BL) is indicated for point of reference. (B) Animal as in A but carrying the EHups-GAL80 transgene as well. No GFP fluorescence is detected.

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