βTub85D promoter sequences drive expression of a deleted form of aux (lacking amino acid residues 762-1165, which includes the kinase and PTEN-related domains) which is tagged at the C-terminal end with mRFP(Unk).
auxCJ.βTub85D.mRFP(Unk) partially rescues auxI670K/auxG257E
Expression of auxCJ.βTub85D.T:Disc\RFP-mRFP in auxI670K/auxG257E mutants rescues male sterility.