By further exploring a glioblastoma repository [89], Bhaduri et al. observed that individual tumours co-expressed a variety of GSC marker genes such as PROM1 (CD133), PDGFRA, NES and OLIG2 (Figure 4D), which also confirmed the expression found at the single cell transcriptomic level (Figure 4B). Here, PROM1 is linked to glioblastoma.