Column : Shodex IEC DEAE-825 (8.0mmID*75mm) Eluent : (A); 20mM Sodium phosphate buffer(pH6.6) + 250mM KCl + 5M Urea + 0.5mM EDTA (B); (A) + 250mM KCl Linear gradient: 0min to 150min, (A) to (B) Flow rate : 1.0mL/min Detector : UV(260nm) Column temp. : Room temp.