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Alinearwater-insoluble(1→3)--D-glucan,codedasGL-IV-I,wasisolatedfromthefruitbodyofGanodermalucidumbyextractingwithsodiumhydroxidesolution.Itsderivativeswerepreparedbyusingsulfation,carboxymethylation,hydroxyethlation,hydroxypropylationandmethylation,respectively,namedasS-GL,CM-GL,HE-GL,HP-GLandM-GL.Fivederivativesexhibitedwellwater-solubility.GL-IV-Iexistedasacompactcoilchainindimethylsulfoxide,whereasfivederivativesasslightlyexpandedflexiblechainconformationin0.9%NaClaqueoussolution. |
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