Since C/EBPβ regulates RCAN1-4 expression in GBM cells (Fig. 2J), we tested whether the overexpression of C/EBPβ in RCAN1-4neg GBM cells (SF10281) induces RCAN1-422-32-reactive TCR-T cytotoxicity. Here, RCAN1 is linked to glioblastoma.