Gap1E21F.2 does not protect Df(1)su(s)R194/+ clones in the eye; Df(1)su(s)R194/+ ; Gap1E21F.2 clones are not recovered in the adult eye in animals with mosaic eyes containing two genotypes of cells with respect to RpL36; cells which are Df(1)su(s)R194/+ and cells in which the haplo-insufficiency of Df(1)su(s)R194/+ for RpL36 has been rescued by RpL36+t4 (in a wild-type background the Df(1)su(s)R194/+ clones are eliminated by cell competition and are not seen in the adult eye in these animals). Also, Gap1E21F.2 does not prevent apoptosis of Df(1)su(s)R194/+ cells in the wing.