breakpoint near 0 (0 coordinate = the insertion point of the defective P-element at 50C-D in the Harwich strain; positive values to the right.)
Embryonic CNS exhibits severe disturbances and larval exhibit severe cuticle loss.
Larvae have variable cuticular abnormalities, including the absence of large portions of the cephalic and ventral epidermis.
P-element or transposase source: Harwich P strain.