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Purification Of Antibody Fragments And Single Domain Antibodies With Amsphere™ A3 Protein A Resin

By Gerald Platteau, et al

Purification Of Antibody Fragments And Single Domain Antibodies With Amsphere™ A3 Protein A Resin

The standard capture purification of full-size, classical antibodies is typically performed with Protein A affinity chromatography. Binding of the Protein A affinity ligand to the “Fc” region of antibodies (Abs) takes place at the juncture of the constant domains 2 and 3 of the Ab heavy chains (Lewis et al. 2008). This high affinity binding primarily involves hydrophobic interactions. Antibodies that belong to the same subclass have greater than 95% homologous Fc-regions, allowing Protein A to be a capture platform for a wide range of antibodies (Ghose et al. 2005).

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