Su(z)2 is expressed from a cDNA under the control of an Hsp70 promoter.
The tumour-like phenotype of Df(2R)Su(z)2-1.b8 clones in the wing disc is rescued by expression of both Pschs.P and Su(z)2hs.P if heat shock is first started 48 hours after clone induction, but not if heat shock is started after 72 hours.