Expression of Gr64bScer\UAS.cJa in ab1C neurons, under the control of Scer\GAL4Gr21a.9.323 or Scer\GAL4Gr63a.PF, is sufficient to confer a response to trehalose, melezitose, glucose and m-glucoside.
Expression of Gr64bScer\UAS.cJa under the control of Scer\GAL4Gr5a.1 does not restore trehalose-response in Df(3L)ΔGr64 mutant flies.
Expression of Gr64bScer\UAS.cJa under the control of Scer\GAL4Gr5a.8.5 in Df(3L)Gr64ab flies fails to restore a normal response to any sugar, including trehalose. Consistent with this, the reduction of action potentials in response to trehalose in Df(3L)Gr64ab flies is not rescued through expression of Gr64bScer\UAS.cJa under the control of Scer\GAL4Gr5a.8.5.