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Chromatographic Characterization of Affinity and Pseudoaffinity Columns for The Depletion of IgG and HSA from Plasma Samples

Human plasma is a rich and readily accessible source for the detection of diagnostic markers and therapeutic targets for various human diseases. These are usually proteins that are present in human plasma in extremely low concentrations and are often masked by the high abundance proteins like immunoglobulin G (IgG) and human serum albumin (HSA), which represent over 75 % of all proteins. In order to enable the detection of potential biomarkers, IgG and HSA should be efficiently removed from the starting sample. In this work an affinity and a pseudoaffinity chromatographic column, used for an efficient removal of IgG and HSA from human plasma, were thoroughly characterized. A CIM monolithic column bearing Protein G ligands was
used for the removal of IgG, and a column bearing an anti-HSA dye was used for the depletion of HSA.

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