A 2A-GAL4 cassette followed by a Disc\RFP3xP3.cUa marker has been inserted into the endogenous AdoR locus, at the 3' end of the open reading frame. This results in the GAL4 driver being expressed as a separate protein under the control of endogenous AdoR regulatory sequences.
Scer\GAL4AdoR-2A-GAL4.KI drives expression in C4da neurons, but not in C3da neurons or ensheathing glia.