Column : Shodex Asahipak ES-502N 7C (7.5mmID*100mm) Eluent : (A); 20mM Piperazine(pH5.0) (B); (A) + 300mM NaCl Linear gradient: 0min to 12min, (A) to (B) Flow rate : 1.0mL/min Detector : UV(280nm) Column temp. : 30deg-C