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Pathway of l-valine biosynthesis. EMP pathway, Embden-Meyerhof-Parnas pathway; IivBN, acetolactate synthase I; IlvC, ketol-acid reductoisomerase; IlvD, dihydroxyacid dehydratase; IlvE, branched-chain amino acid aminotransferase; Bcd, leucine dehydrogenase; PntAB, pyridine nucleotide transhydrogenase.
