UAS regulatory sequences drive expression of a Y239A mutant of Fsn tagged with a Tag:HA epitope.
primordial germ cell | maternal effect, with Scer\GAL4VP16.nanos.UTR
Embryos from Scer\GAL4nos.UTR.T:Hsim\VP16>FsnY239A.Scer\UAS.T:Ivir\HA1-overexpressing females form fewer primordial germ cells than do wild-type embryos (an average of 27 versus 34).