C Tip recording analysis of S6 sensilla from control and Gr28bMi flies. Stimuli used are 0.2% DEET, 1.0 mM coumarin, 0.5 mM quinine, 10 mM umbelliferone, 10 mM caffeine, 0.3 mM strychnine, 0.3 mM lobeline, 0.1 mM chloroquine, 0.2 mM denatonium, 0.5 mM papaverine, 0.1 mM berberine and 0.1% SDS (n ≥ 7). The error bars represent SEMs. 