Expression of Sfxn2EY02703 under the control of Scer\GAL4elav.PU in third instar larvae results in a significant reduction in the number of synaptic boutons and increase in mean bouton diameter at neuromuscular junctions from muscles 6, 7 and 12; and a reduction in the number of type II boutons innervating muscle 12; but does not result in observable defects in eye morphology.