Starting with plasmid pWHL, a 635bp fragment of the βTub56D gene intron was cloned upstream of a truncated heat shock promoter in front of a lacZ reporter gene at a unique StuI site in the multiple cloning site.
EcollacZβTub56D.AS2 reporter gene expression is observed initially in late stage 13 embryos. No difference in staining pattern is observed as compared to EcollacZβTub56D.β1WHI, but the level ofstaining is decreased in the embryonic/larval A1-7 pleural external apodeme ('petapo' or pet apodemes).