DNAJB11 and glioblastoma: In both GBM tumors (human‐ or murine‐derived, N‐linked‐glycoproteins (such as ERDJ3/DNAJB11) were found in the digitonin fraction thus indicating that the refluxed proteins had been translocated into the ER and modified by N‐Linked glycosylation, before being refluxed to the cytosol (Appendix Fig S1G‐H).