3.2.2.30 - 715607 3.2.2.30 ammonium sulfate precipitation, DEAE-Sephadex gel filtration, hydroxyapatite column chromatography, S-formycinylhomocysteine-Sepharose column chromatography, and Sephacryl S-200 gel filtration 171854 3.2.2.30 HisTrap column chromatography 726595 3.2.2.30 HisTrap column chromatography and Superdex 200 gel filtration 716856, 727008 3.2.2.30 HisTrap column chromatography and Superdex 75 gel filtration 726595 3.2.2.30 Ni-NTA affinity column chromatography and gel filtration 709718 3.2.2.30 Ni-NTA agarose column chromatography 681477 3.2.2.30 Ni-NTA column chromatography and Superdex 200 gel filtration 727044