You can try DEAE-Sephacel or DEAE-Sephadex A-50. However, a one step purification on IEX chromatography might not give an homogenous pure enzyme unless coupled with GF or Affinity chromatography.
Well Peramachi Palanivelu , I will read about Pi of my concern protein.
Sir, Molecular weight of my concern protein is about 41kDa, so can I choose column on the basis of MW ? If yes, then which column will be compatible for mentioned kDa protein ?