LGALS4 and neoplasm: To test if the tumour overgrowth and invasion phenotypes we had observed in the optic lobe were due to ectopic expression of RasV12 and pico in eyFLP-expressing Repo+ glia, we repeated our experiments in a repo-GAL80 background to block GAL4-mediated expression specifically in repo-positive glia but not in other cell types (Figure 6a).