Example: Duplication of Side-Chain Atoms

The following example duplicates the atoms of a side chain. The duplicated atoms are identical to the original ones except for the segment name. The example can be used to set up alternate conformations (see Section 13.8).

duplicate 
   selection=( resid 40 and not 
             ( name ca or name n or name c or name o ) )
   segid="ALT"
end