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Isoprenoid and carotenoid pathway in plants. A simplified schematic representation of the plastidial methylerythritol 4-phosphate (MEP; 2-C-methyl-D-erythritol-4-P) and carotenoid pathways. DXS, deoxyxylulose 5-phosphate synthase; DXR, deoxyxylulose 5-phosphate reductoisomerase; IPP, isopentenyl pyrophosphate; DMAPP, dimethylallyl pyrophosphate; GGPP, geranylgeranyl pyrophosphate; PSY, phytoene synthase.
