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자료유형
학술저널
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한국식품영양과학회 Journal of Food Science and Nutrition Journal of Food Science and Nutrition Vol.6 No.3
발행연도
2001.9
수록면
180 - 186 (7page)

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Bone marrow cell proliferating arabinogalactan-like polysaccharide (ALR-3Ha-l-l) has been purified from rhizomes of Atractylodes lancea DC. In order to characterize the essential structure of ALR-3Ha-l-l for expression of the activity, sequential enzymatic digestion using exo-α-L-arabinofuranosidase (AFase) and exo-β-D- (1→3)-galactanase (GNase) was employed. After ALR-3Ha-l-l was digested with the AFase, the GNase digestion cleaved only 10% and 23% of 3-linked and 3,6-branched galactose, respectively, from arabinose-trimmed ALR-3Ha-1-1 (AT-ALR- 3Ha-1-1), and gave small amounts of intermediate size (AT-G-2) and shorter oligosaccharides (AT-G-3) fractions in addition to a large amount of the GNase resistant fraction (AT-G-1). When AT-G-1 was redigested gradually with the AFase and GNase, it released trace amounts of oligosaccharides in addition to a large amount of the resistant fraction. When the final enzyme-resistant fraction from AT-G-1 was digested simultaneously with both AFase and GNase, the resistant fraction was significantly degraded into two long fragments (3AT-3G-l and 2). The mixture of digestion products from the first GNase digestion of AT-ALR-3Ha-1-1 showed a significantly decreased bone marrow cell proliferation activity to about 30% of the activity of ALR-3Ha-1-1, but the GNase resistant fraction (AT-G-1) still had significant activity. Although the second gradual enzymatic digestion of AT-G-l showed a marginal decrease in activity, the resulting fragments (3AT-3G-1 and 2) by the final simultaneous enzymatic digestion lost most of the activity. Component sugar, methylation and FAB-MS analyses indicated that the digestion products (AT-G-2, AT-G-3, 2AT-2G-2 and 2AT-2G-3) released from AT-ALR-3Ha-1-1 by the sequential enzymatic digestion contained galactose-containing oligosaccharides mainly comprising 6-linked galactose, that some of which were partially arabinosylated, and these oligosaccharides were attached to β-D-(1→3)-galactan backbone in its non-reducing terminal side as side chains.

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Abstract

INTRODUCTION

MATERIALS AND METHODS

RESULTS AND DISCUSSION

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