Ins2 insertion within the first intron and a P{Ins1a} insertion 29bp upstream of the transcription start site.
3.5kb P{Ins1a} insertion just 5' of exon 1 and a 4.2kb Ins2 insertion within the first intron.
4.1kb Ins2 insertion within the first intron and an insertion of P{Ins1a} at the 5' side of exon 1.
P{Ins1a} sequence is involved in high Zw gene activity, Ins2 has no effect.
High activity.