1.8.4.9 7 8.5 - 1.8.4.9 7 - assay at 1.8.4.9 9 - assay at 1.8.4.9 8.5 - recombinant protein, expressed in Escherichia coli 1.8.4.9 8.8 - recombinant protein, expressed in Escherichia coli 1.8.4.9 8 - substrate: 3'-phosphoadenosine 5'-phosphosulfate