A sequence cassette has been introduced into the attP site present in TI{TI}Octβ1RattP, restoring the deleted Octβ1R sequence and inserting a 2A-p65(AD)::Zip+ cassette before the stop codon of the Octβ1R-RA isoform. This results in the p65(AD)::Zip+ hemidriver being expressed as a separate protein under the control of the endogenous Octβ1R regulatory sequences that normally drive expression of the RA isoform.