A Database of Polysachharide 3D structures
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Diffraction Diagram
Fig.1 Diffraction pattern from a well oriented and polycrystalline fiber of sodium-carrageenan that is almost perpendicular to the incident X-ray beam.
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Carrageenan Iota - Sodium Salt
Linkage : beta 1-4     beta 1-3
Space Group : trigonal P32
Unit Cell Dimensions (a, b, c in Å and α, β, γ in °)
(No values are displayed if no information is available or the value is zero)
a (Å) = 24.02 - b (Å) = 24.02 - c (Å) = 12.93 - γ (°) = 120.00
Helix Type : half-staggered, parallel, three-fold, right-handed double-helix
Method(s) Used For Structure Determination : X-ray diffraction
Link to the Abstract : http://www.ncbi.nlm.nih.gov/pubmed/11578634
Reference : Three-dimensional structure of the sodium salt of iota-carrageenan Srinivas Janaswamy & Rengaswami Chandrasekaran, Carbohydrate Research 2001, 335, 181?194
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Unit carrageenan-iota-Na-salt_expanded