1181bp fragment corresponding to -1171 to +10 relative to the transcription start site of the eya-RB isoform is fused upstream of a minimal Hsp70 promoter followed by a cDNA encoding the eya-RB isoform (plus 3'UTR).
eyaRB.enh1+E+2 rescues eya1
eyaRB.enh1+E+2 rescues eya2
Expression of eyaRB.enh1+E+2 fully rescues the no-eye phenotype of either the eya2 or the eya1 homozygote adults.