| abstract |
Disclosed is a fusion polypeptide containing a target polypeptide and a tag polypeptide, wherein the tag polypeptide is present on a N-terminal side and/or a C-terminal side of the target polypeptide and has a structure represented by Xaa-Cys-Zaa, Xaa being Asp or Glu, and Zaa being Asp or Glu, or Xaa being Lys or Arg, and Zaa being Lys or Arg. |