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논문 기본 정보

자료유형
학술저널
저자정보
Ji-Hye Choi (서울대학교) Myo-Jeong Kim (인제대학교) Young-Wan Kim (고려대학교) Heeseob Lee (부산대학교) Jong-Tae Park (서울대학교) Byong-Hoon Lee (McGill University) Kwan-Hwa Park (서울대학교)
저널정보
한국식품과학회 Food Science and Biotechnology Food Science and Biotechnology vol 18. no 2
발행연도
2009.4
수록면
570 - 573 (4page)

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The debranching enzyme of Nostoc punctiforme (NPDE) is a novel enzyme that catalyzes the hydrolysis of α-1,6-glycosidic linkages in starch, followed by the sequential hydrolysis of α-1,4-glycosidic linkages. The debranching activity of NPDE is highly specific for branched chains with a degree of polymerization (DP)>8. Moreover, the rate of hydrolysis of α-1,4-linkages by NPDE is greatly enhanced for maltooligosaccharides (MOs) with a DP>8. An analysis of reaction mixtures containing various starches revealed the accumulation of maltooctaose (G8) with glucose and maltose. Based on the novel enzymatic properties of NPDE, an MO mixture containing more than 60% G8 with yield of 18 g G8 for 100 g starch was prepared by the reaction of NPDE with soluble starch, followed by ethanol precipitation and gel permeation chromatography (GPC). The yield of the G8-rich mixture was significantly improved by the addition of isoamylase. In summary, a 4-step process for the production of a G8-rich mixture was developed involving the enzymatic hydrolysis of starch by NPDE.

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Abstract
Introduction
Materials and Methods
Results and Discussion
Acknowledgments
References

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