Fig. 3.
Diagrammatic sketch illustrating the interactions between (A) Nafamostat and 3CLpro protein. (B) VR23 and 3CLpro protein. (C) PLpro protein and Nafamostat. (D) PLpro protein and VR23 by LigPlot. Ligand is shown in purple and: green dashed lines indicate hydrogen bonds with distance in angstrom (Å), spoked red arcs indicate hydrophobic contacts, atoms are shown in black for carbon, blue for nitrogen, red represents oxygen, green represents fluorine and yellow represents sulfur. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)