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Article: Some structural features of citrus limonia gum (lemon gum)
Title | Some structural features of citrus limonia gum (lemon gum) |
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Authors | |
Issue Date | 1968 |
Citation | Carbohydrate Research, 1968, v. 8, n. 1, p. 29-42 How to Cite? |
Abstract | Lemon gum contains residues of D-galactose, L-arabinose, L-rhamnose, D-glucuronic acid, and 4-O-methyl-D-glucuronic acid. Graded, acid hydrolysis affords 3-O-β-L-arabinopyranosyl-L-arabinose, 5-O-α-L-arabinopyranosyl-L-arabinose, 4-O-(4-O-methyl-α-D-glucopyranosyluronic acid)-L-arabinose, three acidic trisaccharides [including O-(4-O-methyl-α-D-glucopyranosyluronic acid)-(1→4)-O-α-L-arabinopyranosyl-(1→5)-L-arabinosel, and higher acidic oligosaccharides. The methylated gum yields 2,3,4-tri-O-methyl-L-rhamnose, 2,3,5- and 2,3,4-tri-, and 2,3-, 2,5-, and 3,5-di-O-methyl-L-arabinose, 2,4-di-O-methyl-D-galactose, and 2,3,4-tri- and 2,3-di-O-methyl-D-glucuronic acid, together with small proportions of 2,3,4,6-tetra-, and 2,3,6-, 2,4,6-, and 2,3,4-tri-O-methyl-D-galactose. Partial, acid hydrolysis of the degraded gum, obtained after graded, acid hydrolysis, affords the β-(1→3)- and β-(1→6)-linkid D-galactose disaccharides, 4-O-(4-O-methyl-α-D-glucopyranosyluronic acid)-D-galactose, 6-O-(β-D-glucopyranosyluronic acid)-D-galactose, and 4-O-(α-D-glucopyranosyluronic acid)-D-galactose. Its O-methyl derivative yields 2,3,4-tri- and 2,3-di-O-methyl-L-arabinose, 2,3,4,6-tetra-, 2,3,6- 2,4,6-, and 2,3,4-tri-, 2,6- and 2,4-di-, and 2-O-methyl-D-galactose, and 2,3,4-tri-O-methyl-D-glucuronic acid. The degraded gum was subjected to a Smith-degradation, and lemon gum to two successive Smith-degradations, and the products were examined by linkage and methylation analysis. It is concluded that the molecules of lemon gum are based on galactan frameworks of a branch-on-branch type, to which are attached rhamnose-, arabinose-, and uronic acid-containing side-chains. © 1968. |
Persistent Identifier | http://hdl.handle.net/10722/332847 |
ISSN | 2023 Impact Factor: 2.4 2023 SCImago Journal Rankings: 0.509 |
DC Field | Value | Language |
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dc.contributor.author | Stoddart, S. F. | - |
dc.contributor.author | Jones, J. K.N. | - |
dc.date.accessioned | 2023-10-06T05:14:44Z | - |
dc.date.available | 2023-10-06T05:14:44Z | - |
dc.date.issued | 1968 | - |
dc.identifier.citation | Carbohydrate Research, 1968, v. 8, n. 1, p. 29-42 | - |
dc.identifier.issn | 0008-6215 | - |
dc.identifier.uri | http://hdl.handle.net/10722/332847 | - |
dc.description.abstract | Lemon gum contains residues of D-galactose, L-arabinose, L-rhamnose, D-glucuronic acid, and 4-O-methyl-D-glucuronic acid. Graded, acid hydrolysis affords 3-O-β-L-arabinopyranosyl-L-arabinose, 5-O-α-L-arabinopyranosyl-L-arabinose, 4-O-(4-O-methyl-α-D-glucopyranosyluronic acid)-L-arabinose, three acidic trisaccharides [including O-(4-O-methyl-α-D-glucopyranosyluronic acid)-(1→4)-O-α-L-arabinopyranosyl-(1→5)-L-arabinosel, and higher acidic oligosaccharides. The methylated gum yields 2,3,4-tri-O-methyl-L-rhamnose, 2,3,5- and 2,3,4-tri-, and 2,3-, 2,5-, and 3,5-di-O-methyl-L-arabinose, 2,4-di-O-methyl-D-galactose, and 2,3,4-tri- and 2,3-di-O-methyl-D-glucuronic acid, together with small proportions of 2,3,4,6-tetra-, and 2,3,6-, 2,4,6-, and 2,3,4-tri-O-methyl-D-galactose. Partial, acid hydrolysis of the degraded gum, obtained after graded, acid hydrolysis, affords the β-(1→3)- and β-(1→6)-linkid D-galactose disaccharides, 4-O-(4-O-methyl-α-D-glucopyranosyluronic acid)-D-galactose, 6-O-(β-D-glucopyranosyluronic acid)-D-galactose, and 4-O-(α-D-glucopyranosyluronic acid)-D-galactose. Its O-methyl derivative yields 2,3,4-tri- and 2,3-di-O-methyl-L-arabinose, 2,3,4,6-tetra-, 2,3,6- 2,4,6-, and 2,3,4-tri-, 2,6- and 2,4-di-, and 2-O-methyl-D-galactose, and 2,3,4-tri-O-methyl-D-glucuronic acid. The degraded gum was subjected to a Smith-degradation, and lemon gum to two successive Smith-degradations, and the products were examined by linkage and methylation analysis. It is concluded that the molecules of lemon gum are based on galactan frameworks of a branch-on-branch type, to which are attached rhamnose-, arabinose-, and uronic acid-containing side-chains. © 1968. | - |
dc.language | eng | - |
dc.relation.ispartof | Carbohydrate Research | - |
dc.title | Some structural features of citrus limonia gum (lemon gum) | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/S0008-6215(00)81688-2 | - |
dc.identifier.scopus | eid_2-s2.0-49949128956 | - |
dc.identifier.volume | 8 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | 29 | - |
dc.identifier.epage | 42 | - |