title: Immunoassay using 125I- or enzyme-labeled protein A and antigen-coated tubes.
mesh_terms: D000327:Adsorption; D000469:Alkaline Phosphatase; D006801:Humans; D007124:Immunoenzyme Techniques; D007136:Immunoglobulins / Q000032:analysis*; D007457:Iodine Radioisotopes; D008727:Methotrexate / Q000032:analysis*; D010969:Plastics; D011107:Polylysine; D011863:Radioimmunoassay / Q000379:methods*; D013205:Staphylococcal Protein A; D013763:Tetrahydrofolates / Q000032:analysis*
chemical_list: D007136:Immunoglobulins; D007457:Iodine Radioisotopes; D010969:Plastics; D013205:Staphylococcal Protein A; D013763:Tetrahydrofolates; D011107:Polylysine; D000469:Alkaline Phosphatase; C005984:5-methyltetrahydrofolate; D008727:Methotrexate