Figure 4.

Interactions in the dimer interface of N15 Cro. (A) Homotypic hydrophobic “zipper” contacts. (B,C) Two different polar networks involving ordered water molecules, shown as plus signs. Hydrogen bonds are indicated by dashed lines. Ribbon and side chains from chain A are shown in gray and cyan, respectively, while the ribbon and side chains from chain B are shown in wheat and green, respectively. Multiple conformations were modeled for several residues. This figure was prepared using PyMOL (DeLano Scientific).