4.2.3.104	Ni-NTA column chromatography, gel filtration	718244	
4.2.3.104	nickel affinity column chromatography	718233	
4.2.3.104	recombinant His-tagged enzyme from Escherichia coli strain BL21(DE3) by cobalt affinity chromatography	747656	
4.2.3.104	recombinant His-tagged enzyme from Escherichia coli strain BL21(DE3)by cobalt affinity chromatography, dialysis, and ultrafiltration, to homogeneity	746789