Expression of gbbScer\UAS.cAa under the control of Scer\GAL4ap-md544, Scer\GAL4hh.PU or Scer\GAL4ci.PU results in 100% lethality. Expression under the control of Scer\GAL4dpp.blk1 results in 39% viability. Wings from adult survivors show blistered and ectopic venation phenotypes.