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1.1.1.140
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constitutive expression of the two sorbitol-6-phosphate dehydrogenase genes srlD1 and srlD2 in a mutant strain deficient for both L- and D-lactate dehydrogenase activities. Both Stl6PDH enzymes are active, and high specific activity can be detected in the overexpressing strains. Using resting cells under pH control with glucose as a substrate, both Stl6PDHs are capable of rerouting the glycolytic flux from fructose-6-phosphate toward sorbitol production with a remarkably high efficiency of 61 to 65% glucose conversion
684551
1.1.1.140
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mutant with a frameshift in gutR (strain BL285). The mutant loses the ability to ferment sorbitol, and transcription of the gut operon in cells grown with a mixture of ribose plus sorbitol is abolished. Sorbitol uptake rate in strain BL285 is 88fold lower than in the wild-type. GutB mutant (strain BL282) constitutively expresses the gut operon but is impaired in sorbitol uptake. GutM mutant (strain BL286) shows lower levels of gutFRMCBA transcription than the wild-type strain
695750
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