The polysaccharides from Ulva pertusa Kjellm and Gelidium divaricatum Martens inhibited CoxB_ at the IC_(0) values of .孔石莼多糖、小石花菜多糖可明显抑制CoxB ,IC0分别为.9μg/mL和7.8μg/mL,SI分别为> 0.和。