Insertion 18bp upstream of the transcription start site.
Some homozygotes survive to adulthood. These adult flies have severely impaired mobility and have a drastically reduced lifespan. Homozygous males are sterile, although the testes contain motile sperm.
A. Spradling.
Complements: Mo2500274. Complements: l(3)73Ah02540.
Excision of the insertion results in wild-type revertants.