Fig. 4From: Co-expression of active human cytochrome P450 1A2 and cytochrome P450 reductase on the cell surface of Escherichia coli Cytochrome c activity. Cytochrome c reduction by whole cells (OD578nm 0.25) was measured at 550 nm. Reaction was started by addition of 100 µmol L−1 NADPH. (1) Assay without cells, (2) E. coli BL21(DE3) cells, (3) cells expressing the CYP1A2, (4) cells expressing CPRBack to article page