CIS peptides

[Gerard 'CD' Kleywegt]

if you want to change the force cst of a parameter for just one
or two residues you don't need to toil at the topology level
i think you can use something like:

parameter
  dihedral (name C  and segid="FCAA" and resi    3)
           (name ...) (name ...) (name ...)
  weight period vale
end

--gerard