Carboxyfluorescein injected into abdominal muscle VL3 fails to spread into muscles VO4 and VO5, in contrast to wild type, indicating a loss of gap-junctional connections between these muscles. Muscles VO4 and VO5 have significantly smaller IA and IK currents than wild type.
Abnormal electrophysiological phenotype. Homozygous flies exhibit uncoordinated leg movements under ether anaesthesia and do not jump to a light off stimulus. Heterozygotes are fully viable but exhibit some neuronal defects.