We found that in TCGA-GBM, the expression levels of ARPC1B, ARPC2, ARPC3, ARP2, and ARP3 were obviously higher in MES phenotype than in PN phenotype, whereas ARPC1B was a unique molecule correlated with a poor prognosis with a significant p value (Fig. 1A, B and Fig. S1A). Here, ARPC2 is linked to glioblastoma.