title: Lactone formation of N-acetylneuraminic acid oligomers and polymers as examined by capillary electrophoresis.
abstract: We examined lactone-formation reaction of oligomers and polymers of N-acetylneuraminic acid in diluted hydrochloric acid solution and found that the time course of the lactonization reaction was easily traced by capillary electrophoresis. The reaction proceeded more rapidly with increasing the molecular mass of oligomers because the conformation of inner units became rigid and more favorable for the formation of lactone linkage. Present results obtained using capillary electrophoresis will be useful in understanding of physical and chemical properties of oligo/polysialic acids.
authors.affiliation: Faculty of Pharmaceutical Sciences, Kinki University, Higashi-osaka, Japan. k_kakehi@phar.kindai.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Kakehi
authors.forename: M
authors.initials: M
authors.lastname: Kinoshita
authors.forename: K
authors.initials: K
authors.lastname: Kitano
authors.forename: M
authors.initials: M
authors.lastname: Morita
authors.forename: Y
authors.initials: Y
authors.lastname: Oda
mesh_terms: D002240:Carbohydrate Sequence; D019075:Electrophoresis, Capillary / Q000379:methods*; D007783:Lactones / Q000737:chemistry*; D008969:Molecular Sequence Data; D019158:N-Acetylneuraminic Acid / Q000737:chemistry*; D011108:Polymers
chemical_list: D007783:Lactones; D011108:Polymers; D019158:N-Acetylneuraminic Acid