Mutant third instar larvae show no significant increase in quantal content at the neuromuscular junction in the presence of the glutamate receptor antagonist philanthotoxin-433 (10μM), indicating a defect in synaptic homeostasis. In the absence of philanthotoxin-433, the mutant larvae show no significant change in evoked excitatory postsynaptic potential (EPSP) amplitude, miniature mEPSP amplitude or quantal content compared to controls.
Mutant flies show normal responses to both low salt (50mM NaCl) and high salt (500mM NaCl) in a two-way choice test. The electrophysiological response of the L4 sensilla to 50mM NaCl and the electrophysiological response of the gustatory receptor neurons in the S6 sensilla to 500mM NaCl is normal in these flies.
ppk11MB02012 flies exhibit a wild-type water-elicited proboscis extension reflex.
Precise excision of the insertion reverts the mutant neuromuscular junction phenotype.