Mutated immunoglobulin-binding polypeptides
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United States of America Patent
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May 30, 2017
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Jul 10, 2014
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Jul 10, 2013
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Abstract
A polypeptide with improved alkaline stability, which polypeptide comprises a mutant of a B or C domain of Staphylococcus Protein A, as specified by SEQ ID NO 1 or SEQ ID NO 2, or of Protein Z, as specified by SEQ ID NO 3, wherein at least the glutamine residue at position 15 has been mutated to an amino acid other than asparagine. The invention also discloses multimers of the polypeptide, as well as separation matrices comprising the multimers or polypeptides.
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