To quantify the impact of Olig1/2 knockout on tumorigenesis, we examined GFP+ (H2b model) or tdT+ (IS model) tumor cells in the control, Olig1/2F/F; ISF/+, and Olig1/2F/F; H2bF/+ mice at both P20 and P40. This evidence concerns the gene DNTT and neoplasm.