|Chain #1*||Identificator of the 1st chain (1-letter code). If chain ID is blank ' ' in the PDB file use '_' character instead.|
|Chain #2*||Identificator of the 2nd chain (1-letter code). If chain ID is blank ' ' in the PDB file use '_' character instead.|
|from ... to ...||Allows to specify a region for analysis in every chain. If any field is left empty (or it contains non-numeric characters) the beginning or the end of the chain is assumed for that field.|
|Threshold||Only residue-residue contacts with contact area above a given threshold (Å2) are displayed. If field is left empty (or it contains non-numeric characters) all contacts are displayed.|
|Scale||This parameters affects the size of the resulting contact map. Make this parameter smaller to get the smaller contact map and vice versa.|
Once you fill the necessary fields and click "Submit" button the program displays a contact map where blue square indicates a contact between pair of residues which are shown at the left and at the top of the contact map. Full lists of atom-atom (see format) and residue-residue contacts are available for download (see links below the contact map).
Program also allows to display a detailed infomartion about all atom-atom contacts between a given pair of contacting residues and to visualize contacting residues using JMol applet (requires installed JAVA plugin for browser).