Imprecise excision of the progenitor P{EP}Vha13EP3577 insertion, resulting in a 1540bp deletion that removes the promoter region and a large part of the transcribed region of Nup58.
Df(3R)Nup58ex1/Df(3R)PR29 animals show larval lethality.
Homozygotes are embryonic lethal (possibly due to a second site mutation apart from the deletion).