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Fermentation of galacturonic acid and other sugars in orange peel hydrolysates by the ethanologenic strain of Escherichia coli |
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| Authors: | K Grohmann E A Baldwin B S Buslig L O'Neal Ingram |
| Institution: | (1) U.S. Citrus and Subtropical Products Laboratory, 600 Avenue S, N.W., P.O. Box 1909, 33883-1909 Winter Haven, Florida, USA;(2) Florida Department of Citrus, 600 Avenue S, N.W., P.O. Box 1909, 33883-1909 Winter Haven, Florida, USA;(3) Department of Microbiology and Cell Science, University of Florida, 32611 Gainesville, Florida, USA |
| Abstract: | Summary Enzymatic hydrolysates of orange peel contain relatively high levels of galacturonic acid and arabinose which are not fermentable to ethanol by yeasts. We observed complete utilization of both sugars during fermentation of peel hydrolysates by the ethanologenic construct of E. coli KO11. The bacterium exhibits a novel pattern of galacturonic acid fermentation producing equimolar amounts of acetate and ethanol accompanied by carbon dioxide. |
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