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Article: Some structural features of the mucilage from the bark of Ulmus fulva (slippery elm mucilage)
Title | Some structural features of the mucilage from the bark of Ulmus fulva (slippery elm mucilage) |
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Authors | |
Issue Date | 1969 |
Citation | Carbohydrate Research, 1969, v. 9, n. 4, p. 429-439 How to Cite? |
Abstract | Slippery elm mucilage contains residues of l-rhamnose, d-galactose, 3-O-methyl-d-galactose, and d-galacturonic acid. The methylated polysaccharide yields 3-O- and 4-O-methyl-l-rhamnose, 2,3,4,6-tetra- and 2,3,6-tri-O-methyl-d-galactose, and 2,3,4-tri- and 2,3-di-O-methyl-d-galacturonic acid, in addition to trace amounts of 2,3,4-tri and 3,4-di-O-methyl-l-rhamnose and 2,4,6-tri-O-methyl-d-galactose. Borohydride reduction of the periodate-oxidised polysaccharide yields a polyalcohol, which, on partial hydrolysis with acid, affords O-(3-O-methyl-d-galactopyranosyl)-(1 → 4)-O-(3-O-methyl-d-galactopyranosyl)-(1 → 4)-O-(3-O-methyl-d-galactopyranosyl)-(1 → 4)-l-rhamnose. Mild, acid hydrolysis yields a Smith-degraded polysaccharide. Methylation analyses are reported for the polyalcohol and for the Smith-degraded polysaccharide. It is concluded that the polysaccharide contains chains of 3-O-methyl-d-galactose residues attached to the C-4 positions of certain l-rhamnose residues, and that 3-O-methyl-d-galactose residues occur in some cases as non-reducing end-groups. d-Galactose is attached as single residues or as 4-O-substituted residues to the C-3 positions of some l-rhamnose residues. This evidence indicates that the polysaccharide is more highly branched than was at one time supposed. © 1969. |
Persistent Identifier | http://hdl.handle.net/10722/332553 |
ISSN | 2023 Impact Factor: 2.4 2023 SCImago Journal Rankings: 0.509 |
DC Field | Value | Language |
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dc.contributor.author | Beveridge, R. J. | - |
dc.contributor.author | Stoddart, J. F. | - |
dc.contributor.author | Szarek, W. A. | - |
dc.contributor.author | Jones, J. K.N. | - |
dc.date.accessioned | 2023-10-06T05:12:24Z | - |
dc.date.available | 2023-10-06T05:12:24Z | - |
dc.date.issued | 1969 | - |
dc.identifier.citation | Carbohydrate Research, 1969, v. 9, n. 4, p. 429-439 | - |
dc.identifier.issn | 0008-6215 | - |
dc.identifier.uri | http://hdl.handle.net/10722/332553 | - |
dc.description.abstract | Slippery elm mucilage contains residues of l-rhamnose, d-galactose, 3-O-methyl-d-galactose, and d-galacturonic acid. The methylated polysaccharide yields 3-O- and 4-O-methyl-l-rhamnose, 2,3,4,6-tetra- and 2,3,6-tri-O-methyl-d-galactose, and 2,3,4-tri- and 2,3-di-O-methyl-d-galacturonic acid, in addition to trace amounts of 2,3,4-tri and 3,4-di-O-methyl-l-rhamnose and 2,4,6-tri-O-methyl-d-galactose. Borohydride reduction of the periodate-oxidised polysaccharide yields a polyalcohol, which, on partial hydrolysis with acid, affords O-(3-O-methyl-d-galactopyranosyl)-(1 → 4)-O-(3-O-methyl-d-galactopyranosyl)-(1 → 4)-O-(3-O-methyl-d-galactopyranosyl)-(1 → 4)-l-rhamnose. Mild, acid hydrolysis yields a Smith-degraded polysaccharide. Methylation analyses are reported for the polyalcohol and for the Smith-degraded polysaccharide. It is concluded that the polysaccharide contains chains of 3-O-methyl-d-galactose residues attached to the C-4 positions of certain l-rhamnose residues, and that 3-O-methyl-d-galactose residues occur in some cases as non-reducing end-groups. d-Galactose is attached as single residues or as 4-O-substituted residues to the C-3 positions of some l-rhamnose residues. This evidence indicates that the polysaccharide is more highly branched than was at one time supposed. © 1969. | - |
dc.language | eng | - |
dc.relation.ispartof | Carbohydrate Research | - |
dc.title | Some structural features of the mucilage from the bark of Ulmus fulva (slippery elm mucilage) | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/S0008-6215(00)80028-2 | - |
dc.identifier.scopus | eid_2-s2.0-0343894995 | - |
dc.identifier.volume | 9 | - |
dc.identifier.issue | 4 | - |
dc.identifier.spage | 429 | - |
dc.identifier.epage | 439 | - |