ENTPD1 and glioblastoma: For example, the combined action of CD73 and CD39 generate immunosuppressive adenosine 29; our data show expression of CD73 by the tumour cells (Fig. 3a) and 5'‐nucleotidase ecto (NT5E) (encoding CD39) by the immune fraction (Fig. 3b), with Mohme et al. demonstrating CD39 expression by GBM‐infiltrating T cells 13.