Figure 4.
Model of Michaelis–Menten type complex of organophosphorus pesticides: ethoprophos (a), phosalone (b), methamidophos (c), and fenamiphos (d) within the active site of hBChE (PDB code: 2PM829). Poses were selected based on criteria that leaving group of pesticide is oriented opposite from oxygen (Oγ) of catalytic serine (Ser198). Pesticide interactions are represented as dashed lines: hydrophobic (purple), hydrogen bonds (green) and electrostatic (orange).