Structural characterisation of a new O-methylated heteroglycan, colleman, from the cyanolichen Collema flaccidum

J.S.R.E. Jensen, B.O. Petersen, T. Veselinovic, E.S. Olafsdottir, Jens Øllgaard Duus, S. Omarsdottir

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An alkali-extractable heteroglycan, colleman, was isolated from the cyanolichen Collema flaccidum, using ethanol fractionation and anion-exchange chromatography. The average molecular weight was estimated to be 360kDa. Structural characterisation of the heteroglycan was performed by high-field NMR spectroscopy (1D proton, 2D-COSY, NOESY, 2D-TOCSY, 1H 13C-HSQC, HMBC, H2BC and HSQC-NOESY).

Original languageEnglish
JournalCarbohydrate Polymers
Issue number3
Pages (from-to)799-807
Publication statusPublished - 2010
Externally publishedYes


  • Cyanolichen
  • Collema flaccidum
  • Colleman
  • Heteroglycan
  • NMR

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