Patent ID: 11884705
Assignee: JSR LIFE SCIENCES CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  G | IPC B  C  G

Claim 0:
1. An immunoglobulin binding protein, comprising at least one mutant of an immunoglobulin binding domain,
wherein the at least one mutant of the immunoglobulin binding domain consists of an amino acid sequence having an identity of at least 95% with the sequence set forth in SEQ NO:9, the amino acid sequence having substitution of lysine at a position corresponding to the 26th position of the amino acid sequence set forth in SEQ ID NO:9 with arginine, substitution of glycine at a position corresponding to the 34th position of the amino acid sequence set forth in SEQ ID NO:9 with histidine, and optionally at least one of substitution of threonine at a position corresponding to the 35th position of the amino acid sequence set forth in SEQ ID NO:9 with arginine, substitution of glycine at a position corresponding to the 42nd position of the amino acid sequence set forth in SEQ ID NO:9 with lysine, and substitution of asparagine at a position corresponding to the 54th position of the amino acid sequence set forth in SEQ ID NO:9 with glutamine.