Cation exchange resins

Abstract

In some embodiments, the present invention provides a method of purifying a protein of interest with a reduced level of aggregation formation in cation exchange (CEX) chromatography, comprising: (a) providing a mixture comprising the protein of interest and one or more contaminants; (b) loading the mixture onto a CEX resin coupled with arginine; and (c) eluting the protein of interest from the resin, thereby purifying the protein of interest with a reduced level of aggregation formation in CEX chromatography.

Dependencies are inferred from the claim text.