2.6.1.4 - 731270 2.6.1.4 191fold to homogeneity 639991 2.6.1.4 290fold 639987 2.6.1.4 84fold 639989 2.6.1.4 partial, 5 isoforms 636731 2.6.1.4 partial, about 30fold 639986 2.6.1.4 using a DE52 column, butyl-Toyopearl column, DEAE-Toyopearl column, CHT ceramic hydroxyapatite column and MonoQ column 703680