4.2.3.135 recombinant His6-tagged Stehi25180 enzyme from Escherichia coli by affinity chromatography and dialysis against EDTA to eliminate metal ions 747535 4.2.3.135 recombinant His6-tagged Stehi64702 enzyme from Escherichia coli by affinity chromatography and dialysis against EDTA to eliminate metal ions 747535 4.2.3.135 recombinant wild-type and mutant His6-tagged Omp6 enzymes from Escherichia coli by affinity chromatography and dialysis against EDTA to eliminate metal ions 747535 4.2.3.135 recombinant wild-type and mutant His6-tagged Omp7 enzymes from Escherichia coli by affinity chromatography and dialysis against EDTA to eliminate metal ions 747535 4.2.3.135 recombinant wild-type and mutant His6-tagged Stehi73029 enzymes from Escherichia coli by affinity chromatography and dialysis against EDTA to eliminate metal ions 747535