Methods of purifying Fc region containing proteins
First Claim
1. A method for purifying a protein having an Fc region from a source liquid comprising the protein and one or more impurities, comprising the steps of:
- adsorbing the protein to an Fc binding agent;
washing the Fc binding agent with a buffer solution containing a divalent cation salt to remove one or more impurities; and
recovering the protein from the Fc binding agent in an elution solution.
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Accused Products
Abstract
The present application provides methods of purifying polypeptides having a Fc region, for example, antibodies or antibody fusions, by adsorbing the polypeptides to a Fc binding agent, such as, for example, Protein A or Protein G, followed by a wash with a divalent cation salt buffer to remove impurities and subsequent recovery of the adsorbed polypeptides. The present application also features methods of eluting the purified polypeptide as well as the incorporation of the methods within a purification train. Kits comprising components for carrying out the methods and instructions for use are also provided.
170 Citations
45 Claims
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1. A method for purifying a protein having an Fc region from a source liquid comprising the protein and one or more impurities, comprising the steps of:
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adsorbing the protein to an Fc binding agent;
washing the Fc binding agent with a buffer solution containing a divalent cation salt to remove one or more impurities; and
recovering the protein from the Fc binding agent in an elution solution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A kit comprising reagents for purifying a protein having an Fc region from impurities, the kit comprising,
a reagent selected from the group consisting of: - a divalent cation salt, and a Fc binding agent, and
instructions for use.
- a divalent cation salt, and a Fc binding agent, and
Specification