title: Secretory piece linked to IgM in individuals deficient in IgA.
mesh_terms: D000361:Agammaglobulinemia / Q000276:immunology*; D000941:Antigens / Q000032:analysis*; D002446:Celiac Disease / Q000276:immunology; D002850:Chromatography, Gel; D003126:Colostrum / Q000276:immunology; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D005779:Immunodiffusion; D007074:Immunoglobulin G; D007075:Immunoglobulin M / Q000032:analysis*; D007136:Immunoglobulins / Q000032:analysis; D007153:Immunologic Deficiency Syndromes / Q000276:immunology*; D012463:Saliva / Q000276:immunology
chemical_list: D000941:Antigens; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D007136:Immunoglobulins