Imprecise excision of the P{PTT-GB} element, resulting in a 357bp deletion in the first LamC exon. 2 insertions appear to be present (Avic\GFP sequences from the P{PTT-GB} element are detected but functional w[+] sequences are not present). The lesion is located within both the LamC and ttv transcription units (since LamC is nested within an intron of ttv). However, only LamC function is affected by the lesion, since the "EX187" chromosome complements ttv00681b and fails to complement LamCEP2199.
