Fig. 2 

Presentation of the AMX binding site and access tunnels in PBP1A. The binding site residues and the six access tunnels are shown in orange, blue, cyan, magenta, pink, purple, green. Inset table: Amino acid residues of the binding site and those lining the access routes to the PBP1A binding site in H. pylori are listed. The tunnel cells are colored based on the tunnels in the 3D structure. The Ser368, which is connected covalently to the AMX, is depicted in red. The residues, commonly present in all tunnels are depicted in yellow highlights. The common residues of the binding site and tunnel-1 are underlined