Hsp70Bb promoter sequences drive expression of a Y4 mutant of eya.
eyaY4.Hsp70Bb rescues eya2
Inducible expression of eyaY4.Hsp70Bb from egg to pupa under the control of both Scer\GAL4hs.PB and Scer\GAL80ts.αTub84B rescues the eyes absent phenotype of eya2 mutants.