title: Absence of acetylcholine receptor antibody in relatives of myasthenic patients.
mesh_terms: D000109:Acetylcholine; D001323:Autoantibodies / Q000032:analysis*; D006680:HLA Antigens / Q000235:genetics; D006801:Humans; D009157:Myasthenia Gravis / Q000235:genetics / Q000276:immunology*; D011950:Receptors, Cholinergic / Q000276:immunology*; D011978:Receptors, Nicotinic / Q000235:genetics / Q000276:immunology*
chemical_list: D001323:Autoantibodies; D006680:HLA Antigens; D011950:Receptors, Cholinergic; D011978:Receptors, Nicotinic; D000109:Acetylcholine