Figure 5.
In vitro recombinant enzymes screening of phase I drug-metabolizing enzymes (DMEs) involved in the formation of metabolites II, III, IV, V, VI, and VII. For screening of phase I DMEs, the incubation system contained 50 mM Tris-HCl buffer solution (pH=7.4), 2 pmol CYPs or 5 mg FMOs, 2 mM MgCl2, 100 μM PZQ and 1 mM freshly prepared NADPH. The relative abundance (peak area ration of metabolites/internal standard) is given.