the relationship between the immunoglobulin kappa light chain allotypes and autoantibodies was studied in a series of seven human monoclonal kappa-bearing igm antibodies with rheumatoid factor ( rf ) activity , two igm anti-low density lipoprotein ( ldl ) antibodies , and one igm anti-intermediate filament ( if ) antibody .
C0004358
autoantibodies
C0035448
rheumatoid factor