1.14.12.22 - 709526 1.14.12.22 glutathione bead chromatography 742172 1.14.12.22 HiTrap chelation column chromatography and Superdex 200 gel filtration 741682 1.14.12.22 metal-chelation column chromatography and gel filtration 741525 1.14.12.22 recombinant enzyme 706986, 706994 1.14.12.22 recombinant protein 707219