In the GBM-sp (Figure 3a), the GSC markers STAT3, SOX2, PROM1, POU5F1, PDGFRA, NOTCH2, MYC, MSI1, L1CAM, ITGA6, CXCR4, and CD44 were significantly expressed in all cell lines (Figure 3b). Here, NOTCH2 is linked to glioblastoma.