We found that PRDM9 expression was the most upregulated among H3K4 methyltransferases in persister cells (Fig. 4a), increased in a time-dependent manner following CMPD1 treatment (Fig. 4b) and across six genetically diverse glioblastoma cell lines (Fig. 4c). The gene discussed is PRDM9; the disease is glioblastoma.