Imprecise excision of the progenitor insertion, resulting in a 1576bp deletion (coordinates 3R:21306955..21308530 , release 5 genome) which removes part of the XNP locus.
1576 bp deletion resulting from the imprecise excision of P{EP}XNPEP635 (coordinates 3R:21306955..21308530 , release 5 genome).