S to A mutation in the C-terminal region in a CKII consensus site.
Keilin organ, with Scer\GAL4arm.PS
Expression of Afra\UbxS.T-A.1-5.7.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4arm.PS suppresses the formation of Keilin's organs in 75% of cases.