PLXNB2 and glioblastoma: In the TCGA glioblastoma samples, PLXNB2 expression was on average upregulated by more than 2.5-fold in classical and mesenchymal subtypes, and more than 1.5-fold in proneural and neural subtypes, while the expression levels of PLXNB1 and -B3 were largely similar between subtypes (Fig. 1B; Fig. S1B).