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  • Title: Evaluation of monomethoxypolyethyleneglycol derivatized superoxide dismutase in blood and evidence for its binding to blood cells.
    Author: Caliceti P, Schiavon O, Mocali A, Veronese FM.
    Journal: Farmaco; 1989; 44(7-8):711-20. PubMed ID: 2590369.
    Abstract:
    A method to evaluate in blood free superoxide dismutase (SOD) and SOD covalently bound to monomethoxypolyethylene glycol (MPEG-5000) is reported. The method takes advantage of gel filtration and cationic exchange chromatography to remove substances present in plasma which can interfere with the SOD enzymatic assay. Using this methodology, it was demonstrated that, contrary to free SOD, MPEG-SOD, when added to blood, was not completely recovered in plasma. Binding of MPEG-SOD to blood cell components takes place involving interactions of MPEG chains with cell membranes.
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