ADARB1 and glioblastoma: Both ADAR1 and ADARB1 were elevated at the protein level in GSCs compared with NSCs and nonmalignant cells derived from epilepsy surgical resection specimens (Supplemental Figure 2, A and B), but only ADAR1 was negatively associated with patient survival in all three GBM databases (Supplemental Figure 2, C and D).