Figure 3.

Expression of the Gr8a reporter in subsets of Gr66a-positive GRNs. A–C, Confocal images. A, Gr66a-I-GFP labeled all bitter responsive GRNs (anti-GFP, green). B, UAS-DsRed was expressed under control of the Gr8a-GAL4 (anti-DsRed, red). Most but not all Gr8a-postive cells were detected in single confocal images C, Merged image of A and B. D, Schematic illustration of a fly labellum showing gustatory sensilla that expressed the Gr8a reporter (red). The nomenclature for the sensilla is as described previously (Hiroi et al., 2002). This differs somewhat from another nomenclature (Weiss et al., 2011).