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The effect of crude extract and purified oligosaccharide on the islets of Langerhans. (A-C) immunohistochemical and (D-F) hematoxylin and eosin staining of the islets of Langerhans treatment by streptozotocin, crude extract, and purified oligosaccharide, respectively, and (G and H) columns of the number of the pancratic islets of immunohistochemical and hematoxylin and eosin staining. **P < 0.01 Indicates significant differences compared with STZ group.
