To find loops in the PDB that have similar conformation to a loop displayed in ICM:

• Read in a protein structure and convert to an ICM object.
• Select the residues in the loop.
• MolMechanics/Loop/Find PDB Segments
• Enter a vicinity value (see: http://www.molsoft.com/man/reals.html#vicinity).
• Enter the number of hits it should return.
• Click OK.
• A table of the hits containing the PDB codes containing a similar loop conformation will be displayed. The column aRMSD is angular (torsional) RMSD.