Method of Preparing Galactolligosaccharides

摘要

A method of preparing a mixture of galactooligosaccharides having the following formula: Gal-(Gal)n-Glc where Gal represents a galactose residue, Glc represents a glucose residue, and n represents an integer between 1 and 4, and monosaccharides by having microorganisms containing beta -galactosidase or beta -galactosidase act on lactose, the method comprising: having glucose isomerase coexist in a liquid to be reacted or adding glucose isomerase after completion of the reaction, whereby a portion of glucose prepared by the beta -galactosidase processing is converted into fructose. Then, sweetener is prepared by separating monosaccharides from the mixture.