Deletion of the fwe locus ( 3L:15816737..15810028 ), with insertion of mCherry after exon 6 (specific for the loseB isoform).
Sequences at the fwe locus at position 3L15816737-15810028 (Release 6 coordinates) were deleted and replaced with the fwe locus lacking the stop codon with an mCherry fusion after exon 6 (specific for the loseB isoform).