This study evaluates the effect of methanol extracts of three Brazilian medicinal plants on in vitro proliferation of human mononuclear cells. Lymphoproliferation assay was carried out by incubating human peripheral blood mononuclear cells from healthy donors (1 x 10(6) cells/mL) with extracts of
The polysaccharide PSPP (purified sweet potato polysaccharide), isolated and purified from the roots of Ipomoea batatas, was found to be a glucan with a molecular weight of 53.2 kDa and specific rotation of +115.0 degrees (ca. 0.80, H(2)O). On the basis of methylation analysis, periodate oxidation,
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