| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide glucan useful as a water-soluble dietary fiber, a manufacturing method and use therefor. <P>SOLUTION: The branched α-glucan is an α-glucan making glucose as a constitution sugar and has a branched structure with a glucose polymerization degree of 1 or more connected to at least a non-reduction terminal end in a linear glucan with a glucose polymerization degree of 3 or more connected through an α-1,4 bond through a bond other than the α-1,4 bond, specifically is the branched α-glucan having the following characteristic in methylation analysis. The branched α-glucan characterized in that (1) a ratio of 2,3,6-trimethyl-1,4,5-triacetylglucitol to 2,3,4-trimethyl-1,5,6-triacetylglucitol is in a range of 1:0.6 to 1:4, (2) a total of 2,3,6-trimethyl-1,4,5-triacetylglucitol and 2,3,4-trimethyl-1,5,6-triacetylglucitol occupies 60% or more of a partially methylated glucitolacetate, (3) 2,4,6-trimethyl-1,3,5-triacetylglucitol is ≥0.5% and <10% of the partially methylated glucitolacetate, and (4) 2,4-dimethyl-1,3,5,6-tetraacetylglucitol is 0.5% or more of the partially methylated glucitolacetate, the novel α-glucosyl transferase for producing the branched α-glucan, the manufacturing methods and use therefor are provided. <P>COPYRIGHT: (C)2010,JPO&INPIT |
