UASp regulatory sequences drive expression of Spt fused with a C-terminal Tag:HA-tag.
Overexpression of SptScer\UAS.P\T.T:Ivir\HA1 under the control of Scer\GAL4mat.αTub67C.T:Hsim\VP16 suppresses the multi-nucleation phenotype during cellularization of homozygous Df(3R)X3F embryos.