Expression of hiwScer\UAS.T:Avic\GFP-EGFP under the control of Scer\GAL4elav-C155 produces expanded synaptic structures at the neuromuscular junction of third instar larvae. When hiwScer\UAS.T:Avic\GFP-EGFP is driven by Scer\GAL4how-24B no phenotype is seen.