When Or85fScer\UAS.T:Hsap\MYC is driven by Scer\GAL4Or22a.8197 in Df(2L)dp-79b/Dp(2;2)dppd21 (Δhalo) flies, mutant animals do not exhibit a strong response to exposure to ethyl acetate, pentyl acetate, ethyl butyrate,methyl salicylate, 1-hexanol, 1-octen-3-ol, E2-hexanal,2,3-butanedione, 2-heptanone or geranyl acetate in the ab3A neuron.