CD81 and neoplasm: For example, MES GBMs (red arrows) were enriched for CAV1, CD44, CD63, RAB27A, SDCBP and SMPDL3A, while PN (blue arrows) tumours contained higher levels of transcripts for ANXA6, CD81, hnRNPA2B1, YBX1 (RNA binding proteins) and RAB35 (Figures S1 and S2).