Column : Shodex AFpak APE-894 (8.0mmID*50mm) Eluent : (A); Tris-HCl(pH7.0) + 0.15M NaCl + 1mM CaCl2 (B); (A) + 0.2M Phosphorylcholine Step gradient: (A) to (B) Flow rate : 1.0mL/min Detector : UV(280nm) Column temp. : Room temp.