1.14.13.181 recombinant His-tagged enzyme DoxA from Escherichia coli, copurification with His-tagged FDX1, FDR2, FDX3, and putidaredoxin and putidaredoxin reductase from Pseudomonas putida from Escherichia coli by cobalt affinity chromatography and ultrafiltration 1.14.13.181 the recombinant DoxA is purified to homogeneity from Streptomyces lividans transformed with a plasmid containing the Streptomyces sp. strain C5 doxA gene under the control of the strong SnpR-activated snpA promoter