[Immunochemical study of the leukocyte myeloperoxidases from various sources]

The antigenic difference between myeloperoxidases of human, rabbit, guinea pig, horse, dog, sheep and mouse leucocytes and horse radish peroxidase was investigated. By counterimmunoelectrophoresis with antiserum specific for human and mouse myeloperoxidase and horse radish peroxidase, the enzyme catalysing peroxidase reaction in leucocytes from the above sources was shown to possess species specificity and different antigenic composition.