title: A nearly idealized 6'-O-methylated iota-carrageenan from the Australian red alga Claviclonium ovatum (Acrotylaceae, Gigartinales).
abstract: The polysaccharides extracted from Claviclonium ovatum were studied by a combination of compositional assays, reductive partial hydrolysis, linkage analysis, Fourier Transform infrared (FTIR) spectroscopy, and 13C, 1H, and 13C/1H heteronuclear multiple quantum correlation (HMQC) two-dimensional nuclear magnetic resonance (NMR) spectroscopy. The chemical and spectroscopic data showed that the alkali-modified C. ovatum polysaccharides are composed of a nearly idealized repeating unit of 6'-O-methylcarrabiose 2,4'-disulfate (the repeating unit of 6'-O-methylated iota-carrageenan), although some minor components were also present. The C. ovatum galactans are the most highly methylated carrageenans reported.
authors.affiliation: School of Botany, University of Melbourne, Victoria 3010, Australia.
authors.forename: Anthony
authors.initials: A
authors.lastname: Chiovitti
authors.forename: Antony
authors.initials: A
authors.lastname: Bacic
authors.forename: David J
authors.initials: DJ
authors.lastname: Craik
authors.forename: Gerald T
authors.initials: GT
authors.lastname: Kraft
authors.forename: Ming-Long
authors.initials: ML
authors.lastname: Liao
mesh_terms: D001315:Australia; D002236:Carbohydrate Conformation; D002351:Carrageenan / Q000737:chemistry* / Q000302:isolation & purification; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D000461:Rhodophyta / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: C494564:6'-O-methylated iota-carrageenan; C068277:methylcarrabioside 2,4'-disulfate; D002351:Carrageenan