title: [Physical-chemical properties and structure elucidation of abPS isolated from the root of Achyranthes bidentata].
abstract: OBJECTIVE
  To study the physicochemical properties and the structure of Achyranthes bidentata polysaccharide (AbPS).
  
  
  METHODS
  AbPS was isolated from the roots of Achyranthes bidentata Bl., and purified by gel filtration chromatography. The distribution of the molecular weight of AbPS was determined by ESI-MS. The structure of AbPS was deduced by methylation analysis, reductive-cleavage and 13CNMR spectroscopy.
  
  
  RESULTS
  AbPS was shown to compose of fructose residues and glucose residues and the molar ratio was 8:1. AbPS contain 2,1-linked fructose residue, 2,1-linked fructose residue, 1,2,6-linked fructose residue, terminal fructose residue and terminal glucose residue.
  
  
  CONCLUSIONS
  AbPS is a fructan and belong to graminan.
authors.affiliation: State Key Laboratory of Bio-organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Academia Sinica, Shanghai 200032, China.
authors.forename: Xiao-ming
authors.initials: XM
authors.lastname: Chen
authors.forename: Yuan-jian
authors.initials: YJ
authors.lastname: Xu
authors.forename: Geng-yuan
authors.initials: GY
authors.lastname: Tian
mesh_terms: D029044:Achyranthes / Q000737:chemistry*; D005630:Fructans / Q000737:chemistry / Q000302:isolation & purification*; D008745:Methylation; D015394:Molecular Structure; D008970:Molecular Weight; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D005630:Fructans