الفهرس 
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Abstract
D.glucose/xylose isomerase;ec 5.3.1.5),commonly referred to as glucose isomerase (gi),is one of the three highest tonnage value enzymes,.gi may be the most important of all industrial enzymes of the future,it catalyzes the reversible isomerization of dglucose and d-xylose to d-fructose and d-xylulose,respectively interconversion of xylose to xylulose serves a nutritional requirement in saprophytc baceria that thrive on decaying plant material and as also aid in the bioconversion of hemicelllulose to ethanol.