公开(公告)号：US3941655A

公开(公告)日：1976-03-02

申请号：US513910

申请日：1974-10-10

申请人： Robert E. Heady ,  William A. Jacaway, Jr.

发明人： Robert E. Heady ,  William A. Jacaway, Jr.

IPC分类号： C12N11/14 ,  C12P19/24 ,  C13K11/00 ,  C07G7/028 ,  C12D13/02 ,  C12D13/10

CPC分类号： C12P19/24 ,  C12N11/14 ,  C13K11/00 ,  Y10S435/815 ,  Y10S435/886

摘要： Levulose-bearing syrups are produced by passing a dextrose solution through a column or bed of an immobilized dextrose isomerase enzyme preparation. The useful life of the enzyme preparation is extended by conducting the isomerization initially at a low operating temperature, then increasing the temperature of operation after an initial decrease in enzyme activity has been observed. Also disclosed is an improved immobilized xylose isomerase enzyme preparation which is prepared by contacting a solution of xylose isomerase with particulate basic magnesium carbonate. The novel immobilized enzyme preparation is useful in enzymatically isomerizing dextrose solutions to levulose-bearing syrups.

摘要翻译： 通过将葡萄糖溶液通过固定化的葡萄糖异构酶制剂的柱或床来产生含有左旋糖的糖浆。 酶制剂的使用寿命通过最初在低操作温度下进行异构化来延长，然后观察到在酶活性初始降低后增加操作温度。 还公开了通过使木糖异构酶与颗粒状碱式碳酸镁接触来制备的改进的固定化木糖异构酶制剂。 新型固定化酶制剂可用于将含葡萄糖的糖浆的葡萄糖溶液酶促异构化。