Df(1)BSC886 was isolated as a FLP recombinase-induced recombination event involving PBac{WH}CG12206f07347 and P{XP}bid05964. The deletion was isolated as a chromosome lacking miniwhite markers in progeny of PBac{WH}CG12206f07347/P{XP}bid05964; MKRS, P{hsFLP}86E/+ females crossed to FM7h/Dp(2;Y)G, P{hs-hid}Y males. These females were heat shocked as larvae as described in Parks et al., Nature Genetics 36: 288-292, 2004 (FBrf0175003). This cross and crosses in preceding and succeeding generations maintained the original genetic background of the Exelixis insertion stocks (Thibault et al., Nature Genetics 36: 283-287, 2004; FBrf0175002). The recombination event generated the genetic element P+PBac{XP5.WH5}BSC886 from the segment of PBac{WH}CG12206f07347 to the left of its FRT site and the segment of P{XP}bid05964 to the right of its FRT site. Its presence was verified using the PCR methods and primers described in Parks et al. The breakpoints of Df(1)BSC886 predicted from the Release 5 genomic coordinates of the transposable element insertion sites are  X:3360929 ;4318013 and the cytological breakpoints predicted from these coordinates are 3D4;4C3. It failed to complement brnfs.107.