UAS regulatory sequences drive expression of a tail-to-tail inverted repeat of Abp1 sequence (consisting of nucleotides 625-1593 followed by nucleotides 1425-625).
Larvae expressing Abp1dsRNA.Scer\UAS under the control of Scer\GAL4VGlut-OK371 show a significant reduction in the number of type Ib boutons per NMJ compared to controls, but the number of axonal branch points per NMJ is not significantly affected.