UASp regulatory sequences drive expression of the miRNA cluster which contains mir-2a-1, mir-2a-2 and mir-2b-2.
Scer\GAL4sca.PU, mir-2a-1UASp.cluster.cSa, mir-2a-2UASp.cluster.cSa, mir-2b-2UASp.cluster.cSa has visible phenotype
Scer\GAL4sca.PU, mir-2a-1UASp.cluster.cSa, mir-2a-2UASp.cluster.cSa, mir-2b-2UASp.cluster.cSa has chaeta | ectopic phenotype
Expression of either P{UASp-mir-2a-2.mir-2a-1.mir-2b-2.S} or PBac{UASp-mir-2a-2.mir-2a-1.mir-2b-2.S} under the control of Scer\GAL4sca.PU results in extra bristles.