UASt regulatory sequences drive expression of a mutated, N-terminally truncated ttk69 protein, tagged at the N-terminal end with three copies of Tag:HA. The "PPDLS" motif has been mutated to "AAAAS".
Expression of ttk69.ΔN153PPDLS.AAAAS.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4hs.2sev results in a wild-type phenotype in the eye.