WASHING COMPOSITION, PROTEIN PURIFICATION METHOD, AND PROTEIN

摘要

The purpose of the present invention is to provide a washing composition with excellent impurity-removing capacity to be used in processes for separating and purifying a target protein. A washing composition to be used in processes for separating and purifying a target protein from a mixed solution containing the target protein and impurities, the washing composition being characterized in containing at least one selected from the following component (A), component (B) and component (C). (A) A cationic surfactant selected from quaternary ammonium salt cationic surfactants having an organic group of at least five carbons and amine salt cationic surfactants having an organic group of at least five carbons (B) A hydroxyl acid ester (C) An amide solvent