βTub85D promoter sequences drive expression of Ack lacking amino acid residues 1013-1073 (removes the C-terminal UBA domain). The protein is tagged at the N-terminal end with mCherry.
AckΔU.βTub85D.mCherry rescues Ack86
AckΔU.βTub85D.T:Disc\RFP-mCherry restores fertility and sperm formation in Ack86 males.