“…The enzymatic activity was determined optically and aerobically by measuring the decrease in absorbance at 340 nm due to the oxidation of NADPH in the presence of a substrate (Wu and Ichikawa, 1995). The reaction mixture comprised FMO (10 Ag protein), 0.1 M K-phosphate buffer, pH 8.0 at 25 jC, and appropriate amounts of NADPH and 0.1 mM to 1.4 mM substrate, in a final volume of 1 ml.…”