FIGURE 6.

The electrostatic potential surface representations of Vp-MtlR and Sf-YggD. A, the Vp-YggD dimer at the top is in an orientation similar to the orientation of the AB-dimer in the left panel of Fig. 1A. The dimer at the bottom is rotated about 90° along the horizontal axis. B, the Sf-YggD dimer at the top is in an orientation similar to the orientation of the BC-dimer in the top panel of Fig. 1B. The dimer at the bottom is rotated about 90° along the horizontal axis. The approximate distances between two ridges from both Vp-MtlR and Sf-YggD dimers are about 50 Å as marked. This figure was prepared with the program GRASP (51).