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The system of galactans of the red seaweed, Kappaphycus alvarezii, with emphasis on its minor constituents.
Carbohydr Res. 2004 Oct 20; 339(15):2575-92.CR

Abstract

The galactans extracted with hot water from Kappaphycus alvarezii, after previous extraction at room temperature, are mainly composed of kappa-carrageenans (approximately 74%) and micro-carrageenans (approximately 3%). However, a significant percentage of these galactans (at least 14%) is composed of sulfated agarans and, possibly, agaran-type sulfated DL-hybrid galactans. These agarans are partially substituted on C-2 or C-4 or disubstituted on both positions of the beta-D-galactose units and on C-3 or C-2 and C-3 of the alpha-L-galactose residues with sulfate groups or single stubs of beta-D-xylopyranose, D-glucopyranose, and galactose or with D-glucopyranosyl-(1-->4)-D-glucopyranose side chains. Significant quantities of 2-O-methyl- and 3-O-methyl-L-galactose units are also present. A great tendency to retain Ca2+ and Mg2+, in spite of massive treatments with Na+ and K+ salts, was observed. The complexation between agarans and agarans-kappa-carrageenans through divalent cations and the possible zipper-type carbohydrate-carbohydrate interactions would be two complementary mechanisms of interactions.

Authors+Show Affiliations

Departamento de Quimica Orgánica (CIHIDECAR-CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria-Pabellón 2, 1428 Buenos Aires, Argentina.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15476719

Citation

Estevez, José M., et al. "The System of Galactans of the Red Seaweed, Kappaphycus Alvarezii, With Emphasis On Its Minor Constituents." Carbohydrate Research, vol. 339, no. 15, 2004, pp. 2575-92.
Estevez JM, Ciancia M, Cerezo AS. The system of galactans of the red seaweed, Kappaphycus alvarezii, with emphasis on its minor constituents. Carbohydr Res. 2004;339(15):2575-92.
Estevez, J. M., Ciancia, M., & Cerezo, A. S. (2004). The system of galactans of the red seaweed, Kappaphycus alvarezii, with emphasis on its minor constituents. Carbohydrate Research, 339(15), 2575-92.
Estevez JM, Ciancia M, Cerezo AS. The System of Galactans of the Red Seaweed, Kappaphycus Alvarezii, With Emphasis On Its Minor Constituents. Carbohydr Res. 2004 Oct 20;339(15):2575-92. PubMed PMID: 15476719.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The system of galactans of the red seaweed, Kappaphycus alvarezii, with emphasis on its minor constituents. AU - Estevez,José M, AU - Ciancia,Marina, AU - Cerezo,Alberto S, PY - 2004/04/27/received PY - 2004/08/25/accepted PY - 2004/10/13/pubmed PY - 2005/4/6/medline PY - 2004/10/13/entrez SP - 2575 EP - 92 JF - Carbohydrate research JO - Carbohydr Res VL - 339 IS - 15 N2 - The galactans extracted with hot water from Kappaphycus alvarezii, after previous extraction at room temperature, are mainly composed of kappa-carrageenans (approximately 74%) and micro-carrageenans (approximately 3%). However, a significant percentage of these galactans (at least 14%) is composed of sulfated agarans and, possibly, agaran-type sulfated DL-hybrid galactans. These agarans are partially substituted on C-2 or C-4 or disubstituted on both positions of the beta-D-galactose units and on C-3 or C-2 and C-3 of the alpha-L-galactose residues with sulfate groups or single stubs of beta-D-xylopyranose, D-glucopyranose, and galactose or with D-glucopyranosyl-(1-->4)-D-glucopyranose side chains. Significant quantities of 2-O-methyl- and 3-O-methyl-L-galactose units are also present. A great tendency to retain Ca2+ and Mg2+, in spite of massive treatments with Na+ and K+ salts, was observed. The complexation between agarans and agarans-kappa-carrageenans through divalent cations and the possible zipper-type carbohydrate-carbohydrate interactions would be two complementary mechanisms of interactions. SN - 0008-6215 UR - https://www.unboundmedicine.com/medline/citation/15476719/The_system_of_galactans_of_the_red_seaweed_Kappaphycus_alvarezii_with_emphasis_on_its_minor_constituents_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0008-6215(04)00366-0 DB - PRIME DP - Unbound Medicine ER -