Abstract
C4b-binding protein (C4BP) is a soluble, 570 kDa large glycoprotein, present in plasma at a concentration of approximately 200 mg/L. C4BP is the main inhibitor of the classical and lectin pathways of complement, where it controls C4b-mediated reactions. Here, we describe a method for purification of C4BP from human plasma, which is based on barium chloride precipitation, anion exchange chromatography, and gel filtration. We also describe a functional assay, in which C4BP’s cofactor activity to factor I, in the degradation of C4b, can be assessed.
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Mohlin, F.C., Blom, A.M. (2014). Purification and Functional Characterization of C4b-Binding Protein (C4BP). In: Gadjeva, M. (eds) The Complement System. Methods in Molecular Biology, vol 1100. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-724-2_14
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DOI: https://doi.org/10.1007/978-1-62703-724-2_14
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