Flies expressing Gprk2Scer\UAS.cTa under the control of Scer\GAL4Or83b.2.642.T:Hsim\VP22 have a constant high-amplitude electroantennogram (EAG) response to ethyl acetate that is near the wild-type peak value, in contrast to wild-type flies, which show robust EAG responses during the middle of the night but weak responses during the middle of the day.
Expression of Gprk2Scer\UAS.cTa under the control of Scer\GAL4Or83b.2.642.T:Hsim\VP22 induces a robust electroantennogram response in a cyc01 background.