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Hello Eugene--

> I am trying to use the dna_refi.inp script to compute the structure of the
> Dickerson dodecamer with some ribose sugar substitutions.  Unfortunately the
> structures, especially the base geometries are significantly distorted.
> 

As you noted additional impropers have been added to the nucleic
topology file. I believe that they are all to completely define methyl
chirality, but that should be checked. One possibility is that these
definitions are inconsistent with these experimental restraints. I will
check further tomorrow.

best regards--
Charles
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