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Structural components of alginic acid. II. The crystalline structure of poly‐α‐L‐guluronic acid. Results of X‐ray diffraction and polarized infrared studies

Atkins, E. D. T., Nieduszynski, I. A., Mackie, W., Parker, K. D., Smolko, E. E.·1973·Biopolymers

Abstract

A structural investigation of the marine algal polysaccharide poly‐α‐L‐guluronic acid is described. The molecular chains consist of 1 → 4 diaxially linked L‐guluronic acid residues in the 1C chair conformation and are stabilized in a twofold helix conformation by an intra‐molecular O(2)H … O(6)D hydrogen‐bond. The X‐ray fiber diffraction photograph has been indexed to an orthorhombic unit cell in which a = 8.6 Å, b (fiber axis) = 8.7 Å, c = 10.7 Å. A structure corresponding to the space group P2 1 2 1 2 1 is proposed, in which all intermolecular hydrogen bonds interact with water molecules and in which all oxygen atoms except for the inaccessible bridge oxygens are involed. The relationship between the shape and structure of the polyguluronic acid molecule and its biological function is discussed.

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Metadata

Authors
Atkins, E. D. T., Nieduszynski, I. A., Mackie, W., Parker, K. D., & Smolko, E. E.
Venue
Biopolymers
Publisher
Wiley
Published
1973-08
Volume
12
Issue
8
Pages
1879-1887
ISSN
  • 0006-3525 (ISSN-L)
  • 1097-0282
OpenAlex
W4240172470
Cited by
182
References
0
FWCI
2.00
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Structural components of alginic acid. II. The crystalline structure of poly‐α‐L‐guluronic acid. Results of X‐ray diffraction and polarized infrared studies. https://app.cochat.ai/papers/10.1002/bip.1973.360120814
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Atkins, E. D. T., Nieduszynski, I. A., Mackie, W., Parker, K. D., & Smolko, E. E. (1973). Structural components of alginic acid. II. The crystalline structure of poly‐α‐L‐guluronic acid. Results of X‐ray diffraction and polarized infrared studies. Biopolymers. https://doi.org/10.1002/bip.1973.360120814

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