Figure 6.—

Expression of Or88a–GAL4 constructs. (A) Constructs. (B) Expression patterns of the indicated Or88a–GAL4 truncation constructs are shown in Z-projections of internal confocal sections. The three constructs with 486–465 bp of Or88a upstream DNA are expressed in the distolateral region of the antenna, but in fewer ORNs than Or88a−1.6kb. Constructs carrying 359 or 159 bp (not shown) do not drive detectable GFP expression in antennal ORNs. Antennae from flies heterozygous for both an Or88a–GAL4 driver and the UAS–GFP reporter were dissected 0–1 day post-eclosion. (C) Mean numbers of GFPlabeled sensilla per antenna (±SEM; 5 ≤ n ≤ 10 antennae) of 0- to 1-day males. Each bar represents data from an independent insertion of the indicated Or88a–GAL4 construct. 0 indicates that no GFP-labeled sensilla were detected. Abbreviations: P, proximal; M, medial; L, lateral; Di, distal.