System for simultaneous isomerization and fermentation of sugars
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United States Patent and Trademark Office
Abstract
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Methods and systems for the isomerization and fermentation of xylose and hexose sugars using an immobilized enzyme system capable of sustaining two different pH microenvironments in a single vessel are disclosed. Bilayer particles are dispersed in a mixture comprising an ionic borate source and xylose. The bilayer particles have a first region with a first enzymatic activity comprising xylose isomerase and a pH of 6 or above, and a second region having a second enzymatic activity at an acidic pH.
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Keywords
C12N11/00, C12M1/00, C12M1/40, C12N1/16, C12N1/18, C12N11/18, C12P7/06, C12P7/14