Imprecise excision of P{EP}PI31G7971 removing the entire coding sequence of exp (exons 2-11).
Homozygous, hemizygous and trans-heterozygous (with exp135) embryos exhibit bubble-like cysts with an enlarged diameter in unicellular (lateral trunk, ganglionic branch) and intracellular (lateral ganglionic branch) tracheal branches.
exp11 is rescued by Scer\GAL4btl.PS/expB.UAS.Tag:HA
Scer\GAL4btl.PS-mediated expression of expB.Scer\UAS.T:Ivir\HA1 completely rescues the tracheal phenotype of exp135 and exp11 mutants.