title: Structural assignment of a heteropolysaccharide isolated from the gum of Cochlospermum religiosum (Katira gum).
abstract: A heteropolysaccharide isolated from the gum (Katira) of Cochlospermum religiosum was found to consist of D-galactose, D-galacturonic acid and L-rhamnose in a molar ratio 2:1:3. Structural assignment of the polysaccharide was carried out using total acid hydrolysis, methylation analysis, periodate oxidation, Smith degradation and NMR studies (1H, 13C, DQF-COSY, TOCSY, NOESY, HMBC and HSQC) and the repeating unit of the polysaccharide was established as [Formula: see text].
authors: Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore, 721 102 West Bengal, India.
authors: Arnab K
authors: AK
authors: Ojha
authors: Debabrata
authors: D
authors: Maiti
authors: Krishnendu
authors: K
authors: Chandra
authors: Subhas
authors: S
authors: Mondal
authors: Debsankar
authors: D
authors: Das Sadhan K Roy
authors: Kaushik
authors: K
authors: Ghosh
authors: Syed S
authors: SS
authors: Islam
mesh_terms: D031212:Bixaceae / Q000737:chemistry*; D002240:Carbohydrate Sequence; D005690:Galactose / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D006868:Hydrolysis; D008745:Methylation; D008969:Molecular Sequence Data; D019906:Nuclear Magnetic Resonance, Biomolecular; D010084:Oxidation-Reduction; D010504:Periodic Acid / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification*; D012210:Rhamnose / Q000737:chemistry
chemical_list: D006603:Hexuronic Acids; D011134:Polysaccharides; D010504:Periodic Acid; C007819:galacturonic acid; C009288:metaperiodate; D012210:Rhamnose; D005690:Galactose