βTub85D promoter sequences drive expression of amino acid residues 339-1165 of aux (this lacks the kinase domain) which are tagged at the C-terminal end with mRFP(Unk).
auxΔK.βTub85D.mRFP(Unk) partially rescues auxI670K/auxG257E
Expression of auxΔK.βTub85D.T:Disc\RFP-mRFP in auxI670K/auxG257E mutants rescues male sterility.