The mild muscle detachment phenotype of ifB2 mutant embryos is strongly enhanced, both with respect to the extent of detachment and penetrance in embryos that are also heterozygous for Tspunspecified.
Scer\GAL4sr-239 driven TspScer\UAS.cCa rescues the lethality and results in the complete rescue of the muscle defects associated with alleles TspΔ6 and TspΔ79.