An elav promoter regulates expression of a GAL4(DBD)::Zip- hemidriver (component of the 'Split GAL4' system, contains the GAL4 DNA-binding domain). An internal ribosomal entry site (IRES) from the Ubx gene followed by DsRed(Unk) coding sequence is present downstream of the hemidriver sequence, but this is not expressed in the nervous system.
1 copy of the cAMP response element (CRE) is upstream of p65(AD)::Zip+ and hsp70.