title: [Studies on the polysaccharide H3 of Cuscuta chinensis Lam].
abstract: OBJECTIVE
  To study the structural characterization of an acidic polysaccharide, H3, isolated from the seeds of Cuscuta chinensis Lam.
  
  
  METHODS
  Both chemical (such as sugar component analysis, methylation analysis, reduction of uronic acid, partial acidic hydrolysis, etc.) and spectral analysis (1HNMR, 13CNMR, IR, etc.) were used to investigate the structural characterization of H3.
  
  
  RESULTS
  The molecular weight of H3 was estimated to be more than 1.0 x 10(6). The analytical results of sugar components indicated that H3 composed of Rha, Ara, Gal, and Gal A. Methylation analysis, partial acidic hydrolysis and 1H, 13CNMR further identified the linkages and sequence of the residues of H3.
  
  
  CONCLUSIONS
  These results suggest that H3 is a highly branched heteropolysaccharide with structure elucidation for the first time.
authors.affiliation: Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031, China.
authors.forename: Z
authors.initials: Z
authors.lastname: Wang
authors.forename: J N
authors.initials: JN
authors.lastname: Fang
mesh_terms: D001089:Arabinose / Q000032:analysis; D034182:Cuscuta / Q000737:chemistry*; D005690:Galactose / Q000032:analysis; D008970:Molecular Weight; D010946:Plants, Medicinal / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification; D012210:Rhamnose / Q000032:analysis; D012639:Seeds / Q000737:chemistry
chemical_list: D011134:Polysaccharides; D001089:Arabinose; D012210:Rhamnose; D005690:Galactose