UASt drives expression of a mbc cDNA in which the prolines in the N-terminal PXXP motif at amino acids 110-113 are converted to alanines, and tagged with a Tag:HA epitope.
Scer\GAL4twi.PG-mediated expression of mbcNPxxP.Scer\UAS.T:Ivir\HA1 does not produce muscle phenotypes.
mbcNPxxP.UAS.Tag:HA/Scer\GAL4twi.PG rescues mbcD11.2
mbcNPxxP.UAS.Tag:HA/Scer\GAL4how-24B rescues mbcD11.2/Df(3R)mbc9
Scer\GAL4twi.PG- or Scer\GAL4how-24B-mediated expression of mbcNPxxP.Scer\UAS.T:Ivir\HA1 rescues the mbcD11.2 myoblast fusion defect.