Imprecise excision of the progenitor insertion, resulting in a 1630bp deletion (coordinates 3R:21306938..21308567 , release 5 genome) which removes part of the XNP locus.
1630 bp deletion resulting from the imprecise excision of P{EP}XNPEP635 (coordinates 3R:21306938..21308567 , release 5 genome).