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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
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pubmed:dateCreated |
1988-5-26
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pubmed:abstractText |
The locations of the O-acetyl substituents on the major nonasaccharide repeating unit of the xyloglucan isolated from sycamore extracellular polysaccharides were determined by a combination of analytical methods, including f.a.b.-m.s. and 1H-n.m.r. spectroscopy. The O-2-linked-beta-D-galactosyl residue of the nonasaccharide was found to be the dominant site of O-acetyl substitution. Both mono-O-acetylated and di-O-acetylated beta-D-galactosyl residues were detected. The degree of O-acetylation of the beta-D-galactosyl residue, was estimated by 1H-n.m.r. spectroscopy to be 55-60% at O-6, 15-20% at O-4, and 20-25% at O-3. 1H-n.m.r. spectroscopy also indicated that approximately 50% of the beta-D-galactosyl residues are mono-O-acetylated, 25-30% are di-O-acetylated, and 20% are not acetylated.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Glucans,
http://linkedlifedata.com/resource/pubmed/chemical/Oligosaccharides,
http://linkedlifedata.com/resource/pubmed/chemical/Polysaccharides,
http://linkedlifedata.com/resource/pubmed/chemical/Xylans,
http://linkedlifedata.com/resource/pubmed/chemical/xyloglucan
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pubmed:status |
MEDLINE
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pubmed:month |
Feb
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pubmed:issn |
0008-6215
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
15
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pubmed:volume |
173
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
113-32
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:3356024-Carbohydrate Conformation,
pubmed-meshheading:3356024-Carbohydrate Sequence,
pubmed-meshheading:3356024-Glucans,
pubmed-meshheading:3356024-Magnetic Resonance Spectroscopy,
pubmed-meshheading:3356024-Mass Spectrometry,
pubmed-meshheading:3356024-Molecular Sequence Data,
pubmed-meshheading:3356024-Oligosaccharides,
pubmed-meshheading:3356024-Plants,
pubmed-meshheading:3356024-Polysaccharides,
pubmed-meshheading:3356024-Xylans
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pubmed:year |
1988
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pubmed:articleTitle |
Location of the O-acetyl substituents on a nonasaccharide repeating unit of sycamore extracellular xyloglucan.
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pubmed:affiliation |
Complex Carbohydrate Research Center, University of Georgia, Athens 30613.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.,
Research Support, Non-U.S. Gov't
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