Inhibition of 7-ethoxyresorufin O-deethylase (EROD) activities by Angelica keiskei, Oenanthe javanica and Brassica oleracea extracts. Inset: Percent inhibition vs. concentration of each vegetable extracts. Percent inhibition was calculated from the initial slopes, in which each vegetable extracts addition was compared with the control. Data points and error bars indicate mean ± S.D. (n = 3). Symbols: ● control, ○ 25 μg/mL, ▼ 50 μg/mL. ▽ 100 μg/mL, ■ 200 μg/mL.