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dc.contributor.authorRuggiero, J.
dc.contributor.authorFossey, Marcelo Andrés [UNESP]
dc.contributor.authorSantos, J. A.
dc.contributor.authorMourao, P. A. S.
dc.identifier.citationCarbohydrate Research. Oxford: Elsevier B.V., v. 306, n. 4, p. 545-550, 1998.
dc.description.abstractCalcium binding and charge distribution on highly branched and linear sulfated L-galactans from ascidians have been studied using a metallochromic indicator and conductimetric titrations. The distance between charged groups of the linear and highly branched galactans does not vary despite their marked differences in sulfate/total sugar molar ratios. These results indicate that the sulfated L-galactose units are concentrated in the central polysaccharide core and not intercalated among non-sulfated units. This inference is consistent with the chemical studies of these galactans. Surprisingly, calcium affinity increases with increasing amounts of non-sulfated sugar branches in the molecule. Thus, calcium binding in these polymers is not a simple function of availability of anion binding sites but a more complex calcium-polysaccharide interaction. (C) 1998 Elsevier B.V. Ltd. All rights reserved.en
dc.publisherElsevier B.V.
dc.relation.ispartofCarbohydrate Research
dc.sourceWeb of Science
dc.titleCharge distribution and calcium affinity of sulfated alpha-L-galactans from ascidians. Comparison between linear and highly branched polymersen
dcterms.rightsHolderElsevier B.V.
dc.contributor.institutionUniversidade Federal do Rio de Janeiro (UFRJ)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.description.affiliationUniv Fed Rio de Janeiro, Inst Ciências Biomed, Dept Bioquim, BR-21941590 Rio de Janeiro, Brazil
dc.description.affiliationUniv Estadual Julio de Mesquita Filho, Inst Biol Letras & Ciências Exatas, Dept Fis, BR-15054000 Sao Jose do Rio Preto, SP, Brazil
dc.description.affiliationUniv Fed Rio de Janeiro, Fac Farm, Dept Anal Clin & Toxicol, BR-21951590 Rio de Janeiro, Brazil
dc.description.affiliationUnespUniv Estadual Julio de Mesquita Filho, Inst Biol Letras & Ciências Exatas, Dept Fis, BR-15054000 Sao Jose do Rio Preto, SP, Brazil
dc.rights.accessRightsAcesso restrito
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências Letras e Ciências Exatas, São José do Rio Pretopt
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