Frameshift mutation in the first exon.
Mutant flies have a normal lifespan compared to wild-type controls.
Mutant larvae and adults show melanisation around the wound site after clean needle injury, as occurs in wild type.
Mutant adults wild-type levels of survival after septic injury with Gram positive bacteria (Bacillus subtilis, Enterococcus faecalis or Staphylococcus aureus). Survival after natural infection with the fungus Beauveria bassiana is also wild type.