su(Hw) promoter sequences drive expression of the long isoform of Trf2 (which encodes a 175kDa protein).
Trf2175.su(Hw) rescues Trf2P1
Trf2175.su(Hw) rescues the lethality, sterility and other phenotypic abnormalities of ph-pP1 Trf2P1 flies.