Twenty miRNA binding sites with mismatches at positions 9-12 (creating a "Sponge", designed to sequester miRNAs and thus knocking-down endogenous miRNA activity) are placed in the 3'UTR of mCherry under the control of 10 Gal4 UAS binding sites.
viable, with Scer\GAL4Tub.PU
retina, with Scer\GAL4Tub.PU
Scer\GAL4tub.PU-mediated expression of mir-92bsponge.V2.Scer\UAS.T:Disc\RFP-mCherry results in an apparent invasion of the head cuticle into the retina or even more marked outgrowth within the retinal field.