| abstract |
Disclosed is a method for purifying a recombinant protein from a recombinant cell in which a target recombinant protein is expressed within the cell as an insoluble body, said method characterized in that said recombinant cell is treated under conditions in which a protein derived from a host cell would dissolve, but said recombinant protein would not dissolve, in a first aprotic polar solvent to which an inorganic salt has been added or not added, a first soluble fraction is removed, and then an obtained first insoluble fraction is treated under conditions in which the recombinant protein would dissolve in a second aprotic polar solvent to which an inorganic salt has been added. |