Short hairpin artificial microRNAs (miRs) that target brat. Present in transgenic constructs made using a 'FOFO2.0' based plasmid that contains an Act5C promoter; the construct is designed so that expression of the miRs should only occur once both of the FRT and mFRT71 STOP cassettes located downstream of the Act5C promoter have been excised (requires both the FLP and FLPm5 recombinases, which target FRT and mFRT71 respectively).