UASt regulatory sequences drive expression of a mutant form of tum lacking amino acids 416-418 within the GAP domain.
Scer\GAL4prd.RG1/tumΔYRL.UAS fails to rescue tumDH15
Expression of tumΔYRL.Scer\UAS driven by Scer\GAL4prd.RG1 fails to rescue cytokinesis in tumDH15 mutant embryos.