Isolation and characterization of Df(2R)BSC599
Stacey Christensen, Kim Cook and Kevin Cook
Bloomington Stock Center
Indiana University
Df(2R)BSC599 was isolated as a FLP recombinase-induced recombination event involving P{XP}d03340 and PBac{RB}CG13531e01893. The deletion was isolated as a chromosome lacking miniwhite markers in progeny of P{hsFLP}1, y1 w1118; P{XP}d03340/PBac{RB}CG13531e01893 males crossed to w1118; P{hs-hid}2, wgSp-1/SM6a females. These males 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.RB3}BSC599 from the segment of P{XP}d03340 to the left of its FRT site and the segment of PBac{RB}CG13531e01893 to the right of its FRT site. Its presence was verified using the PCR methods and primers described in Parks et al. with the substitution of the primer 5'-CCAATGCGTTTATTTCAGGTCACG-3' for the RB3' plus or RB3' minus primer in the Hybrid PCR protocol in the Supplementary Methods. Exelixis, Inc. determined the insertion site of PBac{RB}CG13531e01893 to be Release 3 genomic coordinate 17897747 on chromosome arm 2R. This corresponds to 59B3 on the Release 3 and Release 5 genome maps. The predicted position of P{XP}d03340 on the Release 5 map is 59B1. Consequently, the cytological breakpoints of Df(2R)BSC599 are predicted to be 59B1;59B3. Df(2R)BSC599 failed to complement blw1, CycB2 and stl1.