Abstract
A lot of oligosaccharides such as maltooligosylsucrose, palatinose, fructooligosaccharides, lactosucrose and galactooligosaccharides which are produced by the transglycosylation activity of cyclodextrin glycosyltransferase, α-glucosyltransferase, β-fructofuranosidase and β-galactosidase, respectively, have been utilized as a "functional oligosaccharides ." In this paper, I will describe the synthesis of the functional oligosaccharides by transglycosylation of various microbial enzymes using sucrose as a raw material and their functions.