RELA and glioblastoma: Strikingly, we found RELA among the MGT4 screen top hits (Fig. 6b and Supplementary Dataset S2): RELA is one of the NF-kB transcription factors that we previously identified as an MGT1 regulator under homeostatic conditions in glioblastoma-initiating cells in both focused loss-of-function experiments and genome-scale CRISPR KO screens14.