The highly conserved 24 nucleotide 'donor-site complementary sequence' (DCS) has been mutationally extended by 9bp, hypothetically stabilizing the DCS duplex. A 76bp fragment containing a single loxP site is also inserted within para intron 19.
paralytic | temperature conditional
para transcripts in paraDCS-zip mutants display cryptic splice donor-site activation within constitutive exon 19 and upstream alternative exon h.
Homo- or hemi-zygous paraDCS-zip mutants show a significant temperature-sensitive paralytic phenotype.