Deletion of the 16 amino acids of the Ubx QA motif.
Keilin organ, with Scer\GAL4arm.PS
Expression of Ubx::Afra\Ubx250.ΔQA.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4arm.PS suppresses the formation of Keilin's organs in 80% of cases.