The structure of a galactomannan from the seed of Gleditsia triacanthos

A homogeneous galactomannan composed of d-mannose and d-galactose in a molar ratio of 3.2-3.5:1 was isolated in 15-20% yield from the seeds of Gleditsia triacanthos. On periodate oxidation, all of the d-mannose and d-galactose residues were attacked, as hydrolysis of the reduced, oxidized polysaccha...

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Autores principales: Leschziner, C., Cerezo, A.S.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00086215_v15_n2_p291_Leschziner
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00086215_v15_n2_p291_Leschziner
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spelling todo:paper_00086215_v15_n2_p291_Leschziner2023-10-03T14:06:24Z The structure of a galactomannan from the seed of Gleditsia triacanthos Leschziner, C. Cerezo, A.S. A homogeneous galactomannan composed of d-mannose and d-galactose in a molar ratio of 3.2-3.5:1 was isolated in 15-20% yield from the seeds of Gleditsia triacanthos. On periodate oxidation, all of the d-mannose and d-galactose residues were attacked, as hydrolysis of the reduced, oxidized polysaccharide gave only glycerol and erythritol. The periodate consumption was 4.7 molecules per four hexose residues, and 1 molecule of formic acid was produced. Hydrolysis of the methylated polysaccharide (1 mole) yielded 2,3,4,6-tetra-O-methyl-d-galactose (1 mole), 2,3,6-tri-O-methyl-d-mannose (2.5 moles), and 2,3-di-O-methyl-d-mannose (1 mole). Traces of two other compounds (which, according to their chromatographic behavior, could be 2,3,4- and 2,3,6-tri-O-methyl-galactose) were also found. © 1970. Fil:Cerezo, A.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00086215_v15_n2_p291_Leschziner
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description A homogeneous galactomannan composed of d-mannose and d-galactose in a molar ratio of 3.2-3.5:1 was isolated in 15-20% yield from the seeds of Gleditsia triacanthos. On periodate oxidation, all of the d-mannose and d-galactose residues were attacked, as hydrolysis of the reduced, oxidized polysaccharide gave only glycerol and erythritol. The periodate consumption was 4.7 molecules per four hexose residues, and 1 molecule of formic acid was produced. Hydrolysis of the methylated polysaccharide (1 mole) yielded 2,3,4,6-tetra-O-methyl-d-galactose (1 mole), 2,3,6-tri-O-methyl-d-mannose (2.5 moles), and 2,3-di-O-methyl-d-mannose (1 mole). Traces of two other compounds (which, according to their chromatographic behavior, could be 2,3,4- and 2,3,6-tri-O-methyl-galactose) were also found. © 1970.
format JOUR
author Leschziner, C.
Cerezo, A.S.
spellingShingle Leschziner, C.
Cerezo, A.S.
The structure of a galactomannan from the seed of Gleditsia triacanthos
author_facet Leschziner, C.
Cerezo, A.S.
author_sort Leschziner, C.
title The structure of a galactomannan from the seed of Gleditsia triacanthos
title_short The structure of a galactomannan from the seed of Gleditsia triacanthos
title_full The structure of a galactomannan from the seed of Gleditsia triacanthos
title_fullStr The structure of a galactomannan from the seed of Gleditsia triacanthos
title_full_unstemmed The structure of a galactomannan from the seed of Gleditsia triacanthos
title_sort structure of a galactomannan from the seed of gleditsia triacanthos
url http://hdl.handle.net/20.500.12110/paper_00086215_v15_n2_p291_Leschziner
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AT cerezoas structureofagalactomannanfromtheseedofgleditsiatriacanthos
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