To investigate the functional role of cytoplasmic ATR, 3 primary glioblastoma lines (G7, E2, and R15) were treated with the ATR inhibitor (VE822/VX970/Berzosertib), referred to as ATRi henceforth, followed by subconfluent migration assays (Figure 2A(i–iii)). This evidence concerns the gene ATR and glioblastoma.