Amino acid replacement: R664A.
Amino acid replacement: K665A.
Amino acid replacement: R737K.
Amino acid replacement: R738K.
Amino acid replacement: R684A.
Amino acid replacement: R685A.
Amino acid replacement: R718K.
Amino acid replacement: R719K.
Amino acid replacement: R722K.
Amino acid replacement: R723K.
Amino acid replacement: R724K.
Amino acid replacement: R736K.