Insertion of a P{Wee-P.ph0} element into Top1, resulting in the expression of a Top1 fusion protein which is tagged with T:Avic\GFP. The GFP fusion event is predicted to be an internal fusion.
Salivary gland nuclei are larger in size than normal in larvae expressing Top1Wee-P153 under the control of Scer\GAL4Sgs3.PD.