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Schematic representation of the reaction mechanisms of the mevalonate (MVA) and the methylerythritol phosphate (MEP) pathways for isoprenoid biosynthesis. Both pathways possess the final key enzyme isopentenyl diphosphate (IPP) isomerase, which converts the two products, IPP and dimethylallyl diphosphate (DMAPP), into each other (modified according to reference 47).
