Abstract:Alpha-transglucosidase plays a critical role in producing isomalto oligosaccharide. In the paper, A stable mutant strain A.nigerC-1 producing alpha-transglucosidase was obtained by 60Co, UV and UV- LiCl mutant experiments. The productivity of the Alpha-transglucosidase of the mutagenesis is 2.7 times higher than that of the wild strain A.niger M-1.The strain would be applied in the production of isomaltooligosaccharide in the future.
