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A) Biosynthesis of lovastatin. The polyketide products produced from an iterative PKS are highlighted in blue and oxidative tailoring produced from an iterative oxygenase are highlighted in red. The portions of the polyketide chain reflected by intermediates 6 and 7 are shown in the dashed boxes. B) The natural triketide and tetraketide intermediates and the offloaded polyketide pyrone shunt products.
