title: Degradation of human IgM anti-gamma-globulin by pepsin provides evidence of an active fragment.
mesh_terms: D000888:Antibodies, Anti-Idiotypic / Q000032:analysis*; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D002499:Centrifugation, Density Gradient; D006801:Humans; D007120:Immunochemistry; D005779:Immunodiffusion; D007075:Immunoglobulin M; D010434:Pepsin A / Q000378:metabolism*
chemical_list: D000888:Antibodies, Anti-Idiotypic; D007075:Immunoglobulin M; D010434:Pepsin A