Dear all,<br><br>I have an RNA/Protein big complex at low resolution (roughly 4A). I would like to have the base pairs in the RNA as close as possible to ideal base pairs.<br>I added restraints for distances between base pair hydrogen-bonding atoms but this is not enough to ensure that the bases will be  in the same plane.<br>
Could you suggest how to define for  Phenix.refine this planarity ?<br><br><br>I am grateful for your advice,<br><br><br>Peter<br><br>