PSME3 and neoplasm: Given the discriminatory role of K1 and Ki, we investigated transporters and enzymes involved in SCFA uptake and carnitine-related metabolic transformation [22] by immunohistochemistry in a distinct archival cohort of LGGs (n = 7) and HGGs (n = 22) from our brain tissue bank to see if these tumour types expressed different levels of these transporters or enzymes.