Overexpression of the C-terminal of mars (mars431-921.Scer\UAS.P\T.N.T:Avic\GFP) during embryogenesis impairs proper assembly of the mitotic spindle and causes nuclear fusion and results in severe lethality, with only an approximate 8.5% hatch rate.
mars431-921.UASp.N.GFP fails to rescue mars91