1.8.1.B1 - 1.8.1.B1 2',5'-ADP Sepharose column chromatography and Sephadex G-25 gel filtration 1.8.1.B1 ADP-agarose column chromatography 1.8.1.B1 ammonium sulfate precipitation, Ni-NTA column chromatography, GSH-Sepharose column chromatography, and 2',5'-ADP-Sepharose column chromatography 1.8.1.B1 DEAE-Sephacel gel filtration, hydroxyapatite chromatography column chromatography, and Cibacron blue chromatography column chromatography 1.8.1.B1 Ni-NTA column chromatography 1.8.1.B1 nickel affinity column chromatography 1.8.1.B1 recombinant enzyme 1.8.1.B1 recombinantly produced human enzyme (hTGR), the Sec->Cys mutant (hTGRU642C) of the full-length protein, the isolated TrxR domain (hTGR151-643) and the Grx domain containing a monothiol active site (hTGR1-150) are produced 1.8.1.B1 small amounts of the soluble enzyme are obtained by purifying it from a large quantity of cells, in which protein synthesis is induced slowly for a period of 24 h at a low temperature