P{EP}Mrp4EP3221 is inserted 88 bp upstream of the Mrp4 transcription start site.
anterior fascicle & synapse | supernumerary, with Scer\GAL4elav-C155
Flies expressing Mrp4EP3177 using Scer\GAL4da.G32 or Scer\GAL4Act.PU or Scer\GAL4elav.PU display a profound increase in recovery time after anoxia compared with controls.
Mrp4EP3177/Mrp4EP3221 flies show an increase in recovery time after anoxia compared with controls.
No pupae form when Mrp4EP3221 is expressed with Scer\GAL4da.G32 under chronic hypoxia conditions. This is in contrast to controls which show no larval developmental defects and die during late pupal stages under the same conditions.
Mutant larvae expressing EP3221EP3221 under the control of Scer\GAL4elav-C155 have ISN neuron pathfinding defects. Mutant larvae expressing EP3221EP3221 under the control of Scer\GAL4elav-C155 have excessive or ectopic synapses.