MPG and glioblastoma: To address the functional relationship between HTATIP2 expression and MPG subcellular localization, we used GBM cell lines (LN‐229, BS‐153) lacking endogenous HTATIP2 expression due to complete promoter methylation, as determined by MSP (Fig. S2), and transduced them with an inducible, GFP‐tagged HTATIP2 construct (TET‐ON).