Column : Shodex IEC DEAE-420N (4.6mmID*35mm) Eluent : (A); 20mM Tris-HCl buffer(pH8.0) (B); (A) + 0.5M NaCl Linear gradient: 0min to 10min, (A) to (B) Flow rate : 1.5mL/min Detector : UV(280nm) Column temp. : Room temp.