Deletion of the entire P-element and adjacent genomic sequences from position -3kb to +1.5kb, resulting of an internal deletion of 321 amino acids removing exon 1 and 2.
Glial cells fail to differentiate properly. Reduced numbers of dorsal medial cells form. Data suggests that the midline glial cells perform an important function during the induction of the dorsal medial cells.
CNS and tracheal phenotype.
