Imprecise excision of the progenitor insertion, P{EPgy2}Past1EY01852, resulting in a 776 bp deletion 5' to the insertion site, disrupting the first exon of mRNA splice variant A, and the 5'UTR of mRNA splice variant B. 55nt from the 3' end of the P-element are retained.
A 776bp deletion resulting from imprecise excision of P{EPgy2}Past1EY01852. 55bp of the P element remain at the site.
Past188-1 homozygous mutants develop 20% more slowly than heterozygotes. Animals reach adulthood but die three to five days after eclosion, whereas sibling controls survive for over a month.