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Abstract:

The main acidic polysaccharides from the red seaweed Jania rubens share the general characteristics of corallinans (agar-like xylogalactans). After fractionation by ion-exchange chromatography, ten fractions were separated and characterized by sugar composition, other components, methylation, ethylation, desulfation-methylation, and NMR analyses. The main group of fractions carry the agaran disaccharidic repeating unit [→3)-β-d-Gal-(1→4)-α-l-Gal-(1→] substituted mainly on O-6 of the β-d-Gal unit by β-xylosyl side stubs, and less with sulfate or methoxyl groups, and also on O-2 of the α-l-Gal unit with methoxyl or sulfate, or less on O-3 of the same unit with methoxyl groups. These features are somehow common to the four members of the order already studied. However, a sugar uncommon to the order appears in moderate proportions for all the fractions: it is 3,6-anhydro-l-galactose (partly sulfated or methoxylated on O-2) replacing the l-Gal unit. Besides, several other structural features never found in the order (and uncommon in any polysaccharide) appear in some minor fractions: the presence of side stubs of 2,3-di- and 3-O-methyl-d-galactose, and also part of the 3-O-methyl-l-galactose acting as side stubs. These results show that, although the main features of the corallinean xylogalactans are common to all the species studied, each one has minor characteristics of its own. © 2008 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta)
Autor:Navarro, D.A.; Stortz, C.A.
Filiación:Departamento de Química Orgánica-CIHIDECAR, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:3,6-Anhydrogalactose; Agaran; Corallinales; Jania; Sulfated galactans; Xylogalactans; Acids; Alkylation; Biopolymers; Chromatographic analysis; Chromatography; Computer networks; Ion chromatography; Ion exchange; Methylation; Nuclear magnetic resonance; Polysaccharides; Seaweed; Sugar (sucrose); 3,6-Anhydrogalactose; Agaran; Corallinales; Jania; Sulfated galactans; Xylogalactans; Sugars; disaccharidase; galactan; polysaccharide; sugar; unclassified drug; xylogalactan; article; chemical structure; coralline alga; extraction; fractionation; ion exchange chromatography; jania rubens; methylation; nuclear magnetic resonance; nuclear magnetic resonance spectroscopy; priority journal; red alga; seaweed; solvolysis; Algae, Red; Carbohydrates; Chromatography, Ion Exchange; Disaccharides; Galactans; Magnetic Resonance Spectroscopy; Methylation; Models, Chemical; Molecular Conformation; Molecular Structure; Polysaccharides; Protons; Seaweed; Xylose; Corallinales; Jania; Jania rubens; Rhodophyta
Año:2008
Volumen:343
Número:15
Página de inicio:2613
Página de fin:2622
DOI: http://dx.doi.org/10.1016/j.carres.2008.06.015
Título revista:Carbohydrate Research
Título revista abreviado:Carbohydr. Res.
ISSN:00086215
CODEN:CRBRA
CAS:disaccharidase, 52232-46-9, 9068-06-8; galactan, 39300-87-3, 9037-55-2; Carbohydrates; Disaccharides; Galactans; Polysaccharides; Protons; Xylose
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00086215_v343_n15_p2613_Navarro

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Citas:

---------- APA ----------
Navarro, D.A. & Stortz, C.A. (2008) . The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta). Carbohydrate Research, 343(15), 2613-2622.
http://dx.doi.org/10.1016/j.carres.2008.06.015
---------- CHICAGO ----------
Navarro, D.A., Stortz, C.A. "The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta)" . Carbohydrate Research 343, no. 15 (2008) : 2613-2622.
http://dx.doi.org/10.1016/j.carres.2008.06.015
---------- MLA ----------
Navarro, D.A., Stortz, C.A. "The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta)" . Carbohydrate Research, vol. 343, no. 15, 2008, pp. 2613-2622.
http://dx.doi.org/10.1016/j.carres.2008.06.015
---------- VANCOUVER ----------
Navarro, D.A., Stortz, C.A. The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta). Carbohydr. Res. 2008;343(15):2613-2622.
http://dx.doi.org/10.1016/j.carres.2008.06.015