P{PZ} insertion within 5' flanking sequences.
Axonal elongations of the MP1/dMP2 and vMP2 neurons show no obvious abnormality in stage 13 gcmP/gcm1 embryos even though most of the misdifferentiated glial cells do not contact these longitudinal pioneer axons. Fasciculation of the MP1/dMP2 and vMP2 axons occurs normally in the absence of glial cells, although elongation is delayed and the fascicle looks thinner in some hemisegments.
The CNS of heterozygous embryos is normal. Homozygous embryos exhibit defects in the formation of CNS axonal tracts.