Partial deletion of the wing enhancer (FBrf0056190).
P element at 7B deleted (chromosome in situ hybridisation), Southern blots show deletion of 1.3kb approximately -124kb with respect to the start of transcription of ct. No Stalker element detectable by chromosome in situ hybridisation at 7B.
The wing phenotype of ctpN2s flies is not altered by Su(mg)1-61-6, Su(mg)1-71-7 or Su(mg)1-81-8.