Amino acid replacement R442K.
Expression of Stat92ER442K.Scer\UAS.P\T.T:Ivir\HA1 under the control of Scer\GAL4tub.PU exacerbates the lethality of Stat92E85C9 homozygotes, such that a greater fraction of animals die during the embryonic stage.
Stat92ER442K.UASp.Tag:HA/Scer\GAL4ey.PH fails to rescue Stat92E85C9
The mutant eye phenotype seen in mosaic animals in which the eye-antennal disc is almost completely homozygous for Stat92E85C9 is not rescued by Stat92ER442K.Scer\UAS.P\T.T:Ivir\HA1 expressed under the control of Scer\GAL4ey.PH.