Column : Shodex IEC DEAE-420N (4.6mmID*35mm) Eluent : (A); 25mM Tris-HCl(pH7.5) (B); (A) + 1M NaCl Linear gradient: 20%(B) to 50%(B), 0 to 20min Flow rate : 0.5mL/min Detector : UV(260nm) Column temp. : 60deg-C