Conversely, GFP+ cells in Olig1/2F/F; H2bF/+ mice showed no co-labeling with OLIG2 or SOX10 (Figure 3D,E), confirming that the deletion of Olig1/2 in tumor cells did not alter the astrocytic GBM cell phenotype. The gene discussed is OLIG1; the disease is glioblastoma.