| abstract |
(57) [Summary] [Solution] β1-3 derived from a bacterium belonging to the genus Bacillus Disclosed is a novel β-galactosidase that hydrolyzes a galactoside bond, hardly hydrolyzes a β1-6 galactoside bond and a β1-4 galactoside bond, and has an action of selectively forming a β1-3 galactoside bond. [Effects] Galβ1-3GalNAc, which is a key oligosaccharide important in the structure of glycoproteins and glycolipids, can now be inexpensively synthesized by the enzymatic method. |