Amino acid replacement: K71R.
When the kinase-dead hpoK71R.Scer\UAS transgene is expressed in eyes, under the control of Scer\GAL4GMR.long, most R8 cells have a p fate, with only a few R8 cells adopting a y fate.
hpoK71R.Scer\UAS; Scer\GAL4Bx-MS1096 animals have enlarged wings (35% larger than wild-type).
This mutation has been shown to kill the kinase activity of hpo protein.