Expression of sdΔ160-219.Scer\UAS, driven by Scer\GAL4vg.boundary, leads to an enhancement of the wing phenotypes seen in sdETX4 and sd58d mutants. Overexpression of sdΔ160-219.Scer\UAS driven by Scer\GAL4vg.boundary leads to a defective wing phenotype in wild-type flies.