title: [Isolation of normal human serum IgG subclasses].
mesh_terms: D002847:Chromatography, Agarose; D006801:Humans; D007074:Immunoglobulin G / Q000145:classification / Q000302:isolation & purification*; D013205:Staphylococcal Protein A
chemical_list: D007074:Immunoglobulin G; D013205:Staphylococcal Protein A