呋喃果聚糖，呋喃型果聚糖具有葡聚糖、淀粉、齿斑葡聚糖、菊糖和呋喃果聚糖水解活性的蛋白 ，编码该蛋白的基因 ，表达该蛋白的细胞。A homogeneous water-soluble polysaccharide APS-W1， (2→1)-β-d-fructofuranosan， with an average molecular weight of 3.9kDa， was isolated and characterized from the roots of Saussurea costus. Five sulfated derivatives of APS-W1 with different degrees of sulfation were prepared and they showed strong inhibitory effect on the complement activation through the classical pathway (CP50: 2.2-18.9μg/mL; 8.3μg/mL for heparin) and alternative pa