A set of transgenic insertion stocks containing a protein trap cassette, derived from Mi{MIC} insertions in coding introns using Recombinase-Mediated Cassette Exchange (RMCE); see http://flypush.imgen.bcm.tmc.edu/pscreen/technique.html. The protein trap cassette contains a EGFP-FlAsH-StrepII-TEV-3xFlag ("GFSTF") tag that is flanked on either side with a 4X(GlyGlySer) flexible linker; the mini-yellow marker is no longer present. Each insertion line contains one of three versions of the cassette (Mi{PT-GFSTF.0}, Mi{PT-GFSTF.1} or Mi{PT-GFSTF.2}), depending on the reading frame required to generate an in-frame fusion protein with the gene in which the insertion is located. This system also allows UAS/GAL4-based knockdown strategies targeting GFP-sequence containing mRNA (RNAi against GFP) or GFP fusion protein (deGradFP).
