slbo open reading frame from P{Pw15} is replaced by a fragment carrying slbo fused to the VP16 activation domain (amino acids 428 to 490) at amino acid 318.
wild-type
slboVP16 rescues slbounspecified
slboT:Hsim\VP16 rescues between 33% and 24% of slbo- flies, rescue is almost as efficient as slbo+t15.