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  • Title: The heterogeneity of protein AA in secondary (reactive)systemic amyloidosis.
    Author: Westermark P.
    Journal: Biochim Biophys Acta; 1982 Feb 04; 701(1):19-23. PubMed ID: 6173073.
    Abstract:
    In secondary systemtic amyloidosis, amyloid fibrils have protein AA as a main subunit protein. As judged from gel chromatography and electrophoresis, this protein is rather homogeneous. In the present paper it is shown, however, that protein AA is very heterogeneous and composed of many peptides with different isoelectric points. However, their antigenic properties and amino acid compositions vary only little. It is concluded that protein AA is as heterogeneous as its postulated precursor, the acute phase reactant serum AA and that a theory that only one or a few serum protein AA's can give rise to amyloid fibrils, might be wrong.
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