Imprecise excision of the P{en3.2.4kb.ΔPSE1-2} element inserted 6kb upstream of the en transcription start site, resulting in a deletion that includes 6.3kb of upstream sequences and extends 100bp into the en transcription unit. The mini-white gene (transcribed in the opposite orientation to en) remains at the deletion endpoint.
Imprecise excision of P{en3.2.4kb.ΔPSE1-2} results in a deletion in the region upstream and at the 5' end of the en transcription unit.