A Database of Polysachharide 3D structures
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Diffraction Diagram
Fig.1 The X-ray fibre pattern of (1→3)-α-D-glucan triacetate (GTA I). The fibre axis is vertical.
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Glucan triacetate (1→3-α-glucan triacetate)
Linkage : alpha 1-3    
Space Group : monoclinic P21
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) = 30.17 - b (Å) = 17.42 - c (Å) = 12.11
Helix Type : left-handed, three-fold helix. Six molecular chains pass through the unit cell with alternating polarity and with three independent chains comprising the asymmetric unit. The chain axes are located in a hexagonal packing arrangement.
Method(s) Used For Structure Determination : X-ray diffraction and stereochemical model refinement
Link to the Abstract : http://www.ncbi.nlm.nih.gov/pubmed/1515405
Reference : Molecular and crystal structure of (1 → 3)-?-d-glucan triacetate Toshifumi Yui and Anatole Sarko , International Journal of Biological Macromolecules 1992, 14(2), 87-96
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Unit glucan-triacetate_expanded