Changes in structure (e.g., salt bridge, hydrogen bond, and flexibility) around the active sites of AmyK after fusion with peptide 1, and the change in distance between active sites and Met247 for AmyK after fusion with peptide 1. The salt bridge and the hydrogen bond were calculated using Discovery Studio 2.5. The purple sticks are the active sites. (A) The changes in structure (e.g., salt bridge, hydrogen bond, and flexibility) around the active sites of AmyK. The dark dotted line is the salt bridge. The orange dotted line is the hydrogen bond. (B) The changes in structure (e.g., salt bridge, hydrogen bond, and flexibility) around the active sites of AmyK-p1. The dark dotted line is the salt bridge. The orange dotted line is the hydrogen bond. (C) The distance between the active site and Met247 for AmyK. The dotted line is the distance between the active site and Met247 for AmyK. (D) The distance between the active site and Met247 for AmyK-p1. The dotted line is the distance between the active site and Met247 for AmyK-p1.