Imprecise excision of the P{EP} element, removing the entire P{EP} element and 1389bp of the phol transcription unit (the phol promoter and sequences encoding the zinc-finger region are left intact).
Homozygotes look phenotypically normal and have no obvious homeotic phenotypes. Homozygous females or females containing homozygous germline clones lay eggs which look normal and are fertilised, but fail to develop.