Generated through precise excision of the P{lacW} element in P{lacW}l(2)SH0644SH0644.
Boutons in the NMJs of shi1, Syngr1 mutant larvae have an increased synaptic vesicle diameter following a high K[+] shock compared with shi1, SyngrPE controls. The average diameter is comparable to that seen in Syngr1 mutants before K[+] stimulation. The boutons contain a significantly greater number of endocytic cisternae (diameter >200nm) compared with controls. Synaptic vesicle density is reduced compared with controls.