Antibodies to erythrocytes or leukocytes could not be found, but a precipitating antibody reactive with IgA in donor and normal human serum was discovered in the patient's serum. This antibody ...

mouse IgM), and monoclonal antibodies to DX18 (mouse IgM), M18-254 (mouse IgA), DX5 (rat IgM), TX2 (rat IgM), TX1 (rat IgA) as well as human IgM (obtained from a patient with macroglobulinemia ...