Structural studies on the extracellular polysaccharide of the red alga, Porhyridium.
Carbohydr Res
; 52: 169-77, 1976 Dec.
Article
em En
| MEDLINE
| ID: mdl-1035134
ABSTRACT
Partial acid hydrolyzates of the extracellular polysaccharide from Porphyridium cruentum yield three disaccharides and two uronic acids. These constitute all of the uronic acid in the polymer. The novel disaccharides are 3-O(alpha-D-glucopyranosyluronic acid)-L-galactose, 3-O-(2-O-methyl-alpha-D-glucopyranosyluronic acid)-D-galactose, and 3-O-(2-O-methly-alpha-D-glucopyranosyluronic acid)-D-glucose. The polyanion of high molecular weight contains D- and L-galactose, xylose, D-glucose, D-glucuronic acid and 2-O-methyl-D-glucuronic acid, and sulfate in molar ratio (relative to D-glucose) of 2.122.421.001.222.61. Preliminary periodate-oxidation studies suggest that the hexose and uronic acids are joined to other residues by (1 leads to 3) glycosidic linkages. About one-half of the xylose residues are (1 leads to 3)-linked.
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Base de dados:
MEDLINE
Assunto principal:
Polissacarídeos
/
Rodófitas
Limite:
Animals
Idioma:
En
Ano de publicação:
1976
Tipo de documento:
Article