lexAop regulatory sequences drive expression of ChR2.
abnormal proboscis extension reflex | conditional, with Ecol\lexAVP16.Gr5a.cGa
Flies expressing Crei\ChR2Ecol\lexAop.cKa under the control of Ecol\lexAGr5a.T:Hsim\VP16 extend the proboscis in response to blue light.