A U.S. Patent for “Methods for Purifying Antibodies” was awarded to GSK on June 9th, 2020. The present invention is a method for purifying a protein, from a solution containing at least one contaminant by superantigen chromatography comprising: a) adsorbing the protein to the superantigen immobilized on a solid support; b) removing the at least one contaminant by contacting the immobilized superantigen containing the adsorbed protein with a first wash buffer comprising 10 mM to 125 mM sodium caprylate; and c) eluting the protein from the superantigen immobilized on the solid support, wherein the solution is a cell culture feed stream… Learn More