Figure 4.

Example of user-customised diagram produced by LeView. Figure 4 shows an example of diagram generated by LeView for the PDE5 inhibitor sildenafil (PDB entry 1UDT [8]) after user customisation. The ligand appears in black. Hydrogen bonds are represented by blue arrows from donor to acceptor and the distance is displayed. Nearby residues are represented by ovals coloured depending on charge properties (non-polar residues in grey, acidic residues in red, basic residues in blue and uncharged polar residues in purple). Two water-mediated hydrogen bonds appear in green. The number of water molecules is indicated by the number of H2O.