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Corynebacterium glutamicum SNK 118 was metabolically engineered with improved l-arginine titer. Considering the crucial role of NADPH level in l-arginine production, pntAB (membrane-bound transhydrogenase) and ppnK (NAD+ kinase) were co-expressed to increase the intracellular NADPH pool. Expression of pntAB exhibited significant effects on NADPH supply and l-arginine synthesis. Furthermore, argR and...