[48A3-48A3];[48C4-48C4];
A set of ~800 largely isogenic deficiency stocks created by FLP-induced recombination between FRT-carrying transgenic insertions; molecularly defined deletion endpoints correspond to initial location of the progenitor insertions. Designed to fill gaps in deletion coverage and breakpoint placement; also used to replace older available deficiencies that have not been molecularly mapped.
48A3;48C4
Breakpoint from FlyBase's release 5 sequence location of progenitor insertion.
In Df(2R)BSC25/Df(2R)BSC259 (FGF8 null) mutant embryos (referred to as FGF8 null) the longitudinal gut musculature fails to form. A reduced number of LVM founder cells is seen in stage 11 embryos, and by stage 12 almost all of the founders lose contact with the trunk visceral mesoderm (TVM) rather than spreading out across it. By stage 13 the vast majority of these cells undergo cell death. The few cells that do survive are capable of producing a small number of LVM fibres.
The presence of Df(2R)BSC259 was verified using the PCR methods and primers described in FBrf0175003.
The cytological breakpoints of Df(2R)BSC259 predicted from the Release 4 genomic coordinates of the transposable element insertions sites are 48A3;48C4.