Structural Study on Snail Galactans from the Genus Biomphalaria

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概要

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• Galactans from albumen glands and from freshly collected egg masses of intermediary hosts of bilharzia in Brazil (Biomphalaria glabrata, Biomphalaria tenagophila and Biomphalaria straminea) were investigated. All these galactans had D-galactopyranose characterized as the sole sugar component. No evidence was found for the presence of L-galactopyranose in these polymers, using specific enzymes. Methanolysis of the methylated galactans and periodate oxidation data indicated a multibranched structure for these galactans. Yields of O-methyl sugars showed a equimolecular proportion of non-reducing end groups and disubstituted residues linked through positions 3 and 6 and a predominance of β-(l→3)- over β-(l →6)-linkages. In view of the structural identity presently observed in the galactans from all our sources, as compared to the distinctive structure proposed for the galactan after five days of egg masses laying [M. Iacomini et al., Arq. Biol. Tecnol., 23, 329 (1980)], it is inferred that the enzymic system for galactan degradation is still inactive in freshly collected egg masses.

• 社団法人 日本農芸化学会の論文

著者

• Duarte Jose

  Departamento De Biotecnologia Azinhaga Dos Lameiros A Estrada Do Paco Do Lumiar

• Iacomini Marcello

  Departamento De Bioquimica De Universidade Federal Do Parana

• DUARTE José

  Departamento de Bioquímica da Universidade Federal do Paraná and Instituto de Tecnologia do Parana and Instituto de Tecnologia do paraná

• DUARTE Helena

  Departamento de Morfologia e Fisiologia Animal da Universidade Federal Rural de Pernambuco

• DUARTE Eugenia

  Departamento de Ciencias Exatas da Universidade Estadual de Londrina

• DUARTE Gisselia

  Departamento de Bioquímica da Universidade Federal do Paraná and Instituto de Tecnologia do Parana and Instituto de Tecnologia do paraná

• FONTANA José

  Departamento de Bioquímica da Universidade Federal do Paraná and Instituto de Tecnologia do Parana and Instituto de Tecnologia do paraná

• FONTANA José

  Departamento de Bioquímica da Universidade Federal do Paraná and Instituto de Tecnologia do Parana and Instituto de Tecnologia do paraná

関連論文

• Galactomannan and Isolichenan Components of the Carbohydrate-rich Lichen Ramalina ecklonii (Spreng.) Mey. & Flot.(Organic Chemistry)
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• High-Rate Aerobic Treatment of Winery Wastewater Using Bioreactors with Free and Immobilized Activated Sludge
• Repeated Administration of d-Amphetamine Results in a Time-dependent and Dose-independent Sustained Increase in Urinary Excretion of p-Hydroxyamphetamine in Mice
• Structural Study on Snail Galactans from the Genus Biomphalaria

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