slbo open reading frame from P{Pw15} is replaced by a fragment carrying slbo basic region coupled to a VP16 activation domain and the dimerization domain from the Saccharomyces cerevisiae GCN4 gene.
slboVP16.GCN4 partially rescues slbounspecified
slboT:Hsim\VP16,T:Scer\GCN4 rescues between 19% and 7% of slbo- flies.