Expression of crbT6AT9AS11AS13A.intra.Scer\UAS under the control of Scer\GAL4ems.HRE results in variable degrees of spiracle shortening in embryos.
Overexpression of nonphosphorylatable crbT6AT9AS11AS13A.intra.Scer\UAS, under the regulation of Scer\GAL4en-e16E generally leads to embryonic lethality, in a few cases, surviving flies are obtained and display only mild defects in the posterior crossvein.