Unlike wild type (almost all GluRIIC clusters, which localize opposite release sites, are apposed to brp, which marks presynaptic active zones), only around two thirds of GluRIIC clusters are apposed to brp and active zones (brp area) are significantly larger the neuromuscular junction (NMJ) of third instar larvae (more posterior segments, 5 and 6) with expression of Rab3N134I.Scer\UAS.cCa driven by Scer\GAL4elav.Switch.PO (females maintained on fly food with RU486 for 2 days before mating and egg-laying on RU486 food).
Scer\GAL4VGlut.PD/Rab3N134I.UAS.cCa fails to rescue Df(2R)ED2076/Rab3rup
Expression of Rab3N134I.Scer\UAS.cCa driven by Scer\GAL4VGlut.PD does not rescue active zone defects at the NMJ of Rab3rup/Df(2R)ED2076 third instar larvae.