The T2A-GAL4 sequence present in TI{2A-GAL4}Dop1R1PGF3 has been replaced with sequence encoding spGFP11, resulting in the endogenous Dop1R1 coding sequence being tagged at the C-terminal end with spGFP11. An attL site is present upstream of the spGFP11 sequence, and a loxP site and an FRT3 site are present downstream of the spGFP11 sequence.