PROCESSES FOR SEPARATING AGGREGATED PROTEINS FROM MONOMERIC PROTEINS IN A BIOLOGICAL SOLUTION

摘要

A process for separating aggregated proteins from monomeric proteins in a biological solution, the process including: providing at least one filter element having a contacting surface, wherein the filter element comprises filter media comprising: a porous substrate; and disposed on the porous substrate, a polymer comprising a hydrocarbon backbone and a plurality of pendant groups attached to the hydrocarbon backbone, wherein each of a first plurality of pendant groups comprises: (1) at least one acidic group or salt thereof; and (2) a spacer group that directly links the at least one acidic group or salt thereof to the hydrocarbon backbone by a chain of at least 6 catenated atoms; and allowing an initial biological solution to contact the contacting surface of the filter element N under conditions effective to separate the aggregated proteins from the monomeric proteins such that a final biological solution includes purified monomeric proteins.