1.3.1.29 - 390641, 763456 1.3.1.29 by Co2+-loaded immobilized metal affinity chromatography 671464 1.3.1.29 HisTrap column chromatography and Superdex 200 gel filtration 741363 1.3.1.29 partial 762618 1.3.1.29 to homogeneity by ion exchange chromatography and gel filtration 654397