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  • Title: Molecular forms of myeloperoxidase in human plasma.
    Author: Olsen RL, Steigen TK, Holm T, Little C.
    Journal: Biochem J; 1986 Jul 15; 237(2):559-65. PubMed ID: 3026323.
    Abstract:
    A radioimmunoassay for myeloperoxidase was established with the use of affinity-purified anti-(human myeloperoxidase) immunoglobulins. By the use of ion-exchange followed by immunoaffinity chromatography a preparation of immunoreactive, catalytically active myeloperoxidase was obtained from fresh human plasma. In non-denaturing gel electrophoresis, the plasma preparation showed about four catalytically active components of mobility very similar to that of the granulocyte enzyme. SDS/polyacrylamide-gel electrophoresis combined with protein blotting showed that the two polypeptides of strongest antigenicity in the plasma preparation corresponded in Mr to the large and the small subunits of the granulocyte enzyme. In addition, the plasma preparation contained a higher-Mr immunoreactive polypeptide, possibly a precursor form of the enzyme, together with another of Mr similar to that of the large subunit of eosinophil peroxidase.
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