319bp fragment corresponding to +535 to +840 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.+535.+840 fails to rescue eya2
Expression of eyaRB.+535.+840 fails to rescue the no-eye phenotype of eya2 homozygote adults.