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β-1,3-d-xylan and β-1,3-d-glucans take the similar 6-hold right-handed triple helix. According to the classical model, three second hydroxyl groups form a hexagonal shape inter-chain hydrogen bond. Recent progress in computational chemistry proposed two other possibilities for the hydrogen bonds. Both models proposed formation of a hydrogen-bond array along the helix. The difference between them is...
The water solubility of curdlan was enhanced by partial sulfation at O-6. Circular dichroism measurements suggest that the sulfated curdlan with the degree of substitution (DS) from 0 to 8.7mol% forms macromolecular complexes with polycytidylic acid (poly(C)). Although the thermal stability of the complexes decreased with increase in DS, this could be overlapped by addition of NaCl in the concentration...
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