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Comparative Study on the Polysaccharide Contents and Antioxidant Activities of Hippophae rhamnoides subsp. sinensis and Hippophae gyantsensis
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Structural characterization and antioxidant activity of polysaccharide from ginger.

Yun Wang1, Xuelian Wei2, Fuhou Wang3

  • 1College of Food Science and Engineering, Shandong Agricultural University, Tai'an 271018, PR China.

International Journal of Biological Macromolecules
|January 24, 2018
PubMed
Summary

Researchers characterized two ginger polysaccharides (GP1 and GP2), revealing distinct molecular weights, complex sugar compositions, and unique structural properties, indicating they are not simple homopolysaccharides.

Keywords:
antioxidant activityginger polysaccharidestructural characterization

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Area of Science:

  • Food Science
  • Biochemistry
  • Phytochemistry

Background:

  • Ginger (Zingiber officinale) is widely recognized for its medicinal properties.
  • Polysaccharides are complex carbohydrates with diverse biological activities.
  • Understanding the structural characteristics of ginger polysaccharides is crucial for their application.

Purpose of the Study:

  • To extract and characterize two distinct components of ginger polysaccharides, designated GP1 and GP2.
  • To elucidate the molecular weight, monosaccharide composition, and structural features of GP1 and GP2.
  • To determine if GP1 and GP2 are homopolysaccharides or heteropolysaccharides.

Main Methods:

  • Extraction of ginger polysaccharides GP1 and GP2.
  • Determination of molecular weights using appropriate analytical techniques.
  • Analysis of monosaccharide composition and molar ratios using chromatography.
  • Structural analysis to identify specific structural features like helix formation and functional groups.

Main Results:

  • Two ginger polysaccharides, GP1 (6128 Da) and GP2 (12,619 Da), were successfully extracted.
  • GP1 comprised mannose, glucose, and galactose (4.96:92.24:2.80 molar ratio).
  • GP2 consisted of arabinose, mannose, glucose, and galactose (4.78:16.70:61.77:16.75 molar ratio), confirming they are heteropolysaccharides.
  • GP1 exhibited a tightly linked three-helix structure.
  • GP2 contained sulfuric acid groups, demonstrating high oxidation resistance and a more disordered structure.

Conclusions:

  • GP1 and GP2 are distinct heteropolysaccharides from ginger, not homopolysaccharides.
  • The unique structures of GP1 and GP2 suggest varied functional properties.
  • Further research into the biological activities of these characterized ginger polysaccharides is warranted.