A schematic of metabolic pathways present within a bran tumor cell with emphasis on transport proteins (GLUT3), and enzymatic effectors (IDH1/2 mutations, ACSS2, and ACLY (ATP citrate lyase)), which alter tumor metabolism and ultimately epigenetic programs. The result of the IDH1 mutation is emphasized, which results in the accumulation of 2-hydroxyglutarate, a metabolite that inhibits the function of iron, oxygen, and α-ketoglutarate dependent demethylase enzymes, thus leading to aberrant accumulation of both DNA and histone methylation.