UASp regulatory sequences drive expression of Spc105R which is tagged at the C-terminal end with EGFP.
spindle, with Scer\GAL4VP16.mat.αTub67C
Syncytial embryos expressing Spc105RScer\UAS.P\T.C.T:Avic\GFP-EGFP under the control of Scer\GAL4mat.αTub67C.T:Hsim\VP16 show collapsed spindles.