Expression of hiwScer\UAS.T:Zzzz\TAP under the control of Scer\GAL4elav.Switch.PO fails to significantly affect the number of boutons at muscle 4 neuromuscular junctions.
Overexpression of hiwScer\UAS.T:Zzzz\TAP under the very strong neuronal driver Scer\GAL4elav.Switch.PO results in synaptic overgrowth and a significant decrease in bouton size.