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Abstract:

The water extracts from red seaweeds Laurencia obtusa and Laurencia filiformis comprise complex sulfated agarans. Those from L. obtusa have 3-linked β-d-galactose units in part sulfated on 2-position or methylated on 6-position, while the 4-linked units are mostly 3,6-anhydro-α-l-galactose and α-l-galactose 6-sulfate, some of the latter units are substituted with β-d-xylose on 3-position, precluding alkaline cyclization. The 3-linked β-d-galactose units of the agarans from L. filiformis are mostly sulfated on 2-position, but approximately half of these residues also carry the 4,6-O-(1-carboxyethylidene) group. The 4-linked 3,6-anhydro-α-l-galactose units are methylated or substituted in part with single stubs of β-d-xylose on 2-position. This is the first time that substitution with xylose of 3,6-anhydro-α-l-galactose is reported. Besides, α-l-galactose 2-sulfate carrying single stubs of β-d-xylose on 3-position was also detected. These galactans have some common structural characteristics with those of other species of this genus, but also others that are specific for these species. © 2013 Elsevier Ltd.

Registro:

Documento: Artículo
Título:Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis
Autor:Canelón, D.J.; Ciancia, M.; Suárez, A.I.; Compagnone, R.S.; Matulewicz, M.C.
Filiación:Escuela de Bioanálisis, Facultad de Medicina, Universidad Central de Venezuela, Av. Carlos Raúl Villanueva, 1051 Caracas, Venezuela
Cátedra de Química de Biomoléculas, Departamento de Biología Aplicada y Alimentos, Universidad de Buenos Aires, Av. San Martín 4453, 1417 Buenos Aires, Argentina
Departamento de Química Orgánica - CIHIDECAR (CONICET-UBA), Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 2, 1428 Buenos Aires, Argentina
Facultad de Farmacia, Universidad Central de Venezuela, Av. Paseo de los Ilustres, Los Chaguaramos, 1051 Caracas, Venezuela
Escuela de Química, Facultad de Ciencias, Universidad Central de Venezuela, Av. Paseo de los Ilustres, Los Chaguaramos, 1450 Caracas, Venezuela
Idioma: Inglés
Palabras clave:Agaran; Galactan structure; Laurencia; Red seaweed polysaccharide; Sulfated polysaccharide; Agaran; Galactans; Laurencia; Red seaweeds; Sulfated polysaccharides; Polysaccharides; Xylose; Seaweed; Laurencia; Laurencia filiformis; Laurencia obtusa
Año:2014
Volumen:101
Número:1
Página de inicio:705
Página de fin:713
DOI: http://dx.doi.org/10.1016/j.carbpol.2013.09.089
Título revista:Carbohydrate Polymers
Título revista abreviado:Carbohydr Polym
ISSN:01448617
CODEN:CAPOD
Registro:http://digital.bl.fcen.uba.ar/collection/paper/document/paper_01448617_v101_n1_p705_Canelon

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Citas:

---------- APA ----------
Canelón, D.J., Ciancia, M., Suárez, A.I., Compagnone, R.S. & Matulewicz, M.C. (2014) . Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis. Carbohydrate Polymers, 101(1), 705-713.
http://dx.doi.org/10.1016/j.carbpol.2013.09.089
---------- CHICAGO ----------
Canelón, D.J., Ciancia, M., Suárez, A.I., Compagnone, R.S., Matulewicz, M.C. "Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis" . Carbohydrate Polymers 101, no. 1 (2014) : 705-713.
http://dx.doi.org/10.1016/j.carbpol.2013.09.089
---------- MLA ----------
Canelón, D.J., Ciancia, M., Suárez, A.I., Compagnone, R.S., Matulewicz, M.C. "Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis" . Carbohydrate Polymers, vol. 101, no. 1, 2014, pp. 705-713.
http://dx.doi.org/10.1016/j.carbpol.2013.09.089
---------- VANCOUVER ----------
Canelón, D.J., Ciancia, M., Suárez, A.I., Compagnone, R.S., Matulewicz, M.C. Structure of highly substituted agarans from the red seaweeds Laurencia obtusa and Laurencia filiformis. Carbohydr Polym. 2014;101(1):705-713.
http://dx.doi.org/10.1016/j.carbpol.2013.09.089