(−)-Limonene-induced binding spectra obtained with membranous
preparations of SM12, PM2, SM12 F363I, and PM2 I364F. Spectra were
recorded at 0.2 mg of protein/ml (corresponding to 92, 294, 104,
and 75 pmol of P450 for SM12 F363I, PM2, SM12, and PM2 I364F,
respectively) with 100 μM (−)-limonene (for PM2 I364F, the limonene
concentration was 200 μM).