3.4.22.66 - 671000 3.4.22.66 by nickel affinity chromatography or size exclusion chromatography 670097 3.4.22.66 GSTrap FF column chromatography 708950 3.4.22.66 Ni-NTA column chromatography and HiTrap 26/10 QFF column chroamtography 693255 3.4.22.66 purified over chitin beads and by gel filtration 670082