Figure 1.

Cartoon and contact map of the immunoglobulin-binding domain of streptococcal protein G (PDB code 2GB1), where the different secondary structure regions have been marked (shaded lines and schematic images along the axes). (Mauve squares, online color only) Presence of a Gō contact between residues; (black squares) initial Gō contacts that have been removed due to the detection of a native hydrogen bond. Note that hydrogen bonds are detected in every secondary structure region, according to the PDB header.