31.6kb genomic fragment containing stg (-24kb to +7.6kb, coordinates according to this paper).
Imaginal disc cells that are homozygous for stg2 divide only once, producing 2-celled clones that are eliminated by cell competition. This phenotype is rescued by stgt31.6; stg2 cells in the imaginal disc carrying one of these transgenes divide many times and produce large clones of cells. The clones are equal in size to their wild-type sister clones.