Deletion of the 5' end of the short (Tet-S) transcripts which encode proteins that contain a catalytic domain (but no CXXC DNA-binding domain). Tet-S transcripts are not produced in the mutant flies.
Deletion of the 5' end of the short (Tet-S) transcript resulting from FLP-catalyzed recombination using the FRT-containing transposons P{XP}d00815 and PBac{WH}f05022.