UASt regulatory regions drive expression of sand tagged with GFP.
Scer\GAL4GMR94C02/sandUAS.GFP rescues sandΔ
Scer\GAL4tin.CΔ4/sandUAS.GFP rescues sandΔ
Scer\GAL4GMR37B05/sandUAS.GFP fails to rescue sandΔ