Submission form for the Conformation Explorer server. Note that for the receptor file, the user may provide a PDB ID or upload a file. For the ligand, there is a drop down list of several frequently used ligands, or the user may paste the ligand atomic coordinates in PDB format, in the text box. After all sections are filled in, click Submit. You are not done yet, however - the hinges must still be selected in a subsequent step.