EIF4EBP1 and glioblastoma: Interestingly, we observed that EIF4EBP1 mRNA expression is tightly correlated with 4EBP1 phosphorylation level in glioblastoma (Fig. S8G–I), suggesting that in glioblastoma higher phosphorylated 4EBP1 results from EIF4EBP1 overexpression and therefore does not indicate increases of inactive 4EBP1.