| Anhydro sugar and linkage contributions to circular dichroism of agarose and carrageenan, with conformational implications. | |
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MedLine Citation:
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PMID: 9345754 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The geometry-dependent linkage contributions to the circular dichroism (CD) of agarose and carrageenan were determined by subtracting the monomeric CD from the CD of the polymers. For this purpose, the CD of methyl 3,6-anhydro-alpha-D-galactopyranoside, and of other anhydro sugars, was measured. Application of empirical quadrant rules indicates the observed CD to be that expected for the helical conformations of agarose and carrageenan as derived from diffraction data and modeling calculations. The difference in CD sign in the two polymers arises from a translocation of the beta-D-galactose O-2 atom from one quadrant to the neighboring quadrant of the C-5-O-5-C-1 ether chromophore of the preceding anhydro sugar residue, demonstrating the unusually high spatial resolution of conformational analysis that can be achieved with CD under favorable circumstances. |
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Authors:
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E R Arndt; E S Stevens |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Carbohydrate research Volume: 303 ISSN: 0008-6215 ISO Abbreviation: Carbohydr. Res. Publication Date: 1997 Aug |
Date Detail:
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Created Date: 1998-02-04 Completed Date: 1998-02-04 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 0043535 Medline TA: Carbohydr Res Country: NETHERLANDS |
Other Details:
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Languages: eng Pagination: 73-8 Citation Subset: IM |
Affiliation:
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Department of Chemistry, Binghamton University, NY 13902-6016, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Carbohydrate Conformation Carbohydrate Sequence Carbohydrates / chemistry* Carrageenan / chemistry* Circadian Rhythm / physiology* Molecular Sequence Data Sepharose / chemistry* |
| Grant Support | |
ID/Acronym/Agency:
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46465//PHS HHS |
| Chemical | |
Reg. No./Substance:
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0/Carbohydrates; 9000-07-1/Carrageenan; 9012-36-6/Sepharose |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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