Genomic DNA of mys+ has 3.4kb section replaced such that it can only encode the 4A splice variant.
mys4A partially rescues mys11
mys4A partially rescues mys8
Rescues postembryonic phenotypes (wing blisters, disorganized photoreceptors and held-out wings) of mys11 and mys8. One or two copies are unable to rescue the dorsal hole phenotype of mys11.