title: Low molecular weight rheumatoid factors in rheumatoid arthritis sera.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000276:immunology*; D001666:Binding Sites, Antibody; D011232:Chemical Precipitation; D002850:Chromatography, Gel; D006801:Humans; D007106:Immune Sera; D007141:Immunoglobulin Fc Fragments; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D008970:Molecular Weight; D012217:Rheumatoid Factor / Q000032:analysis* / Q000302:isolation & purification; D014461:Ultracentrifugation
chemical_list: D007106:Immune Sera; D007141:Immunoglobulin Fc Fragments; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D012217:Rheumatoid Factor