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1. According to NMR, the polysaccharide fractions were not so pure, because they were difficult for separation. But anyway the structure differences between two fractions should be discussed fully. Further discussion about different structures caused different activities should be given.

2. In your determination of molar mass, there are two deficiencies. First, the presentation of SEC data in terms of elution time is not reproducible, and instead the axis needs to be changed to relative molecular weight to that of your standard.  Second, please provide the polydispersity indexs (PDI) of the homogenous polysaccharide fraction.


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