title: Sulfated xylomannans isolated from red seaweeds Chondrophycus papillosus and C. flagelliferus (Ceramiales) from Brazil.
abstract: Sulfated xylomannans were isolated from two species of genus Chondrophycus by aqueous extraction followed by KCl fractionation. Structural determination of the native, desulfated and Smith-degraded KCl-precipitated polysaccharides carried out by composition and methylation analysis and NMR spectroscopy (1D and 2D experiments) showed the following general structure: [see text] These xylomannans present different degrees of branching (15-25%) by beta-D-Xylp (70-80%) and beta-D-Manp-2-S (20-30%) and molecular weights (33-222kDa). This is the first report of the presence of a sulfated xylomannan in species of order Ceramiales.
authors: Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, PO Box 19046, CEP 81531-990, Curitiba, Paraná, Brazil.
authors: Marco A
authors: MA
authors: Cardoso
authors: Miguel D
authors: MD
authors: Noseda
authors: Mutue T
authors: MT
authors: Fujii
authors: Rosiane G M
authors: RG
authors: Zibetti
authors: Maria E R
authors: ME
authors: Duarte
mesh_terms: D001938:Brazil; D002240:Carbohydrate Sequence; D005591:Chemical Fractionation; D002850:Chromatography, Gel; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D008969:Molecular Sequence Data; D009005:Monosaccharides / Q000032:analysis; D055095:Optics and Photonics; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification*; D000461:Rhodophyta / Q000737:chemistry*; D013431:Sulfates / Q000737:chemistry*
chemical_list: D009005:Monosaccharides; D011134:Polysaccharides; D013431:Sulfates