GBM18 and GBM63 cell exposure to iPA1 μM (Figure 7F, Supplementary Information) did not increase the RAD51 protein levels as compared with untreated cells which showed high RAD51 protein levels; conversely, radiation increased RAD51 protein levels compared to iPA-treated cells, consistently with the results obtained in the established glioblastoma cell lines. Here, RAD51 is linked to glioblastoma.