3、furcontent;toexploretheef-fectofchlorosulfonicacidonsulfationinanexcessofpyridineandtheactionofAngelicaSinensispolysaccharidesulfates(APSs)onmousesplenocyteproliferation.METHODSAn-gelicaSinensispolysaccharide(AP-Ⅰ)wassulfatedbychlorosulfonicacid-pyridinemethod;theestersulfatewas e