furthermore , it has been shown by using the double antibody radioimmunoprecipitation assay with detergent-solubilized [ 35s ] methionine-labelled treponema pallidum as antigen followed by sodium dodecyl sulphate polyacrylamide gel electrophoresis and autoradiography , that igm and igg antibodies in all stages of infection are directed against eight major antigenic proteins of treponema pallidum with a mr of 15,500 , 33,000 , 34,500 , 37,000 , 41,000 , 44,500 , 47,000 and 71,000 .
C0003241
antibody
C0020861
igm