D glucose isomerase ( GI ) can isomerize D glucose and D xylose into D fructose and D xylulose respectively .

D葡萄糖异构酶（GI）能分别催化D葡萄糖和D木糖异构为D果糖和D 木 酮 糖。

However the yeast can be used to ferment xylulose an isomerized product of xylose to ethanol with high yield and efficiency .

但是，这种酵母能发酵 木 酮 糖 为酒精，产率和 转化率都很高。