The P{FRT(Target70,let7CKO1)} has been used as a donor construct for end-in homologous recombination of the genomic region containing mir-100, let-7 and mir-125, which should result in partial duplication of the region, and an FRT site from the donor construct becoming inserted at this region of the genome in the targeted chromosome. This has been carried out in flies carrying PBac{WH}CG10283f03195, so that if this partial duplication is created, recombination can occur between the FRT site in the targeted chromosome and the FRT site in the insertion, resulting in a deletion of the sequence between the two sites. The end result is a deletion of approximately 1.1kb that removes the sequences encoding the mature mir-100, let-7 and mir-125 microRNAs, plus the CG10283 gene is also disrupted as a result of the recombination events.
Associated with: Df(2L)let-7-CKO1.