1.RaymondJR,etal.Adrenergicreceptors:Modelsforregulationofsignaltransductionprocesses.Hyper tension,1990;15∶119 2.DiggesKG,SummersRJ.Characterizationofpostsynapticα‐adrenoceptorsinrataorticstripsandportal veins.BrJPharmacol1983;79∶655 3.PurdyRE,StupeckyGL ......