4.2.1.96 - 4.2.1.96 at 4°C 4.2.1.96 by affinity chromatography over a HisTrap nickel chelating column, followed by TEV cleavage/dialysis at 4°C overnight and then further passage over the a HisTrap nickel column to remove the tag, contaminants and the His-tagged TEV protease. A final purification step using a Superdex 75 size-exclusion column is performed 4.2.1.96 DcoH2 (dimerization cofactor of HNF1alpha) 4.2.1.96 recombinant 4.2.1.96 recombinant enzyme 4.2.1.96 recombinant GST-tagged enzyme from Escherichia coli by glutathione affinity chromatography, tag cleavage by thrombin, and p-aminobenzamidine affinity chromatography 4.2.1.96 wild type and mutant enzymes Cys81Ser and Cys81Arg 4.2.1.96 wild type and mutant enzymes E69A, D100N, H73A, H74A, H91A, W81A, and G72S and double-mutant H73A,H74A expressed in Escherichia coli