When Or98aScer\UAS.T:Hsap\MYC is driven by Scer\GAL4Or22a.8197 in Df(2L)dp-79b/Dp(2;2)dppd21 (Δhalo) flies, mutant animals exhibit a strong response to exposure to pentyl acetate, ethyl butyrate, 1-hexanol, 1-octen-3-ol or 2-heptanone in the ab3A neuron. A strong response is not seen in response to exposure to ethyl acetate, methyl salicylate, E2-hexanal, 2,3-butanedione or geranyl acetate. Inhibitory responses and response termination rates for the mutant ab3A neuron appear to be those expected for neurons expressing Or98a.