Receptor Ligand Global energy (Kcal/Mol) van der Walls force –Attraction (Kcal/Mol) Hydrogen bond (Kcal/Mol) CagC CagC -45.55 -32.43 -0.24 CagC-C CagC -35.92 -40.28 -2.87 CagC-C CagC-C -120.85 -32.66 -2.96

Table 2: Protein interaction study for CagC protein to predict the probable order of pilus assembly.