2.8.3.5 - 2.8.3.5 4 isozymes, separable by isoelectric focusing 2.8.3.5 as described in literature 2.8.3.5 BioSep-SEC-S 3000 gel filtration 2.8.3.5 gel filtration 2.8.3.5 HisTrap column chromatography, and Superdex 200 gel filtration 2.8.3.5 homogeneity 2.8.3.5 N-terminal and C-terminal domain, a mixture of the domains is only active when domains are isolated in the presence of 2-mercaptoethanol 2.8.3.5 native enzyme from mitochondria by chromatofocusing and gel filtration to over 75% purity 2.8.3.5 native enzyme from mitochondria by chromatofocusing and gel filtration to over 85% purity 2.8.3.5 Ni-NTA agarose column chromatography and Ultrogel AcA 44 column chromatography 2.8.3.5 Ni-NTA column chromatography and Superdex 200 gel filtration 2.8.3.5 partial 2.8.3.5 recombinant ScoA and ScoB by metal affinity chromatography and gel filtration 2.8.3.5 recombinant wild-type and mutant enzymes from Escherichia coli strain BL21(DE3) to homogeneity 2.8.3.5 two subunits A and B, both subunits are necessary for enzyme activity