Imprecise excision of the progenitor insertion, resulting in a deletion which removes nucleotides 2L:20850919..20854070 (release 5 genome coordinates).
3152 bp deletion resulting from imprecise excision of P{GT1}BG01978, which removes the transcription start, first exon, and part of the first intron of twit as well as upstream sequences. The published coordinates were claimed to be relative to R4 but they are actually R5 coordinates.
