Structural features, antioxidant and acetylcholinesterase inhibitory activities of polysaccharides from stem of Physalis alkekengi L.

Physalis alkekengi L. (P. alkekengi) is an important medicinal plant in China. In this study, two polysaccharides (SPAP-1 and SPAP-2) were isolated from the stem of P. alkekengi using hot water extraction method. The extract was further purified by DEAE-cellulose and Sephadex G-200 chromatography. The chemical characteristics, surface features and thermal stability of SPAP-1 and SPAP-2 were evaluated. For the first time, high-performance liquid...