title: Studies on the conformational aspects of inulin oligomers.
abstract: The conformational studies of inulin oligomers from G-F2 to G-F9, which isolated from Platycodon grandiflorum, suggested a plausible conformational change between G-F7 and G-F8 from the trends in their chemical shift patterns and molecular rotation; the oligomers higher than G-F8 would form some secondary conformations more rigid than shorter oligomers. On the other hand, spin-lattice relaxation (T1) studies of the protons proposed through-space interactions of 2- and 4-H's of glucose moiety in G-F5, presumably with some atom(s) of the terminal fructose moiety. This would reflect that the inulin molecule adopts a 5/1 helix.
authors.affiliation: Osaka University of Pharmaceutical Sciences, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Oka
authors.forename: N
authors.initials: N
authors.lastname: Ota
authors.forename: Y
authors.initials: Y
authors.lastname: Mino
authors.forename: T
authors.initials: T
authors.lastname: Iwashita
authors.forename: H
authors.initials: H
authors.lastname: Komura
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D007444:Inulin / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008969:Molecular Sequence Data; D009844:Oligosaccharides / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods
chemical_list: D009844:Oligosaccharides; D007444:Inulin