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Related Experiment Videos

Oligosaccharide microanalysis by c.d. spectroscopy. Reference curves for D-mannose derivatives.

H V Meyers1, M Ojika, W T Wiesler

  • 1Department of Chemistry, Columbia University, New York, New York 10027.

Carbohydrate Research
|March 25, 1990
PubMed
Summary

This study introduces a novel method for analyzing oligosaccharides using circular dichroic spectroscopy. The technique employs unique spectral fingerprints to identify sugars and their linkages, offering an alternative to traditional methylation analysis.

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Area of Science:

  • Carbohydrate Chemistry
  • Spectroscopy
  • Analytical Chemistry

Background:

  • Oligosaccharide analysis is crucial for understanding biological processes.
  • Existing methods like methylation analysis have limitations.
  • A need exists for alternative, precise analytical techniques.

Purpose of the Study:

  • To establish the spectroscopic foundation for a new oligosaccharide microanalytical method.
  • To develop a method utilizing circular dichroic spectroscopy for sugar identification.
  • To provide an alternative to methylation analysis that does not require synthetic standards.

Main Methods:

  • Synthesized 24 derivatives of methyl alpha-D-mannopyranoside with specific chromophore and acetate groups.
  • Recorded circular dichroic (c.d.) spectra for these derivatives.

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  • Calculated c.d. curves for tetrachromophoric derivatives using the pairwise additivity rule.

    • Main Results:

    • Successfully prepared and characterized bichromophoric derivatives.
    • Demonstrated accurate calculation of tetrachromophoric c.d. curves.
    • Generated a set of 42 unique spectra for D-mannose, D-glucose, and D-galactose derivatives.

    Conclusions:

    • The developed spectroscopic method provides unique spectral fingerprints for oligosaccharide identification.
    • This technique offers a viable alternative to methylation analysis.
    • The method accurately identifies sugars and their linkage patterns without synthetic standards.