UASt regulatory sequences drive expression of Orco in which all five PKC sites have been exchanges from S/T to N (this results in a protein that is virtually insensitive to cAMP).
Olfactory receptor neurons Or22 expressing Orcomut.UAS under the control of Scer\GAL4Orco.2.642.Hsim\VP22 together with Scer\GAL4Or22a.7.717 respond similar to controls following odorant stimulation with ethyl butyrate.