Hi, the next nightly build of PHENIX will have this option available from phenix.pdbtools. Example: phenix.pdbtools model.pdb truncate_to_polyala=true As always, any feedback will be very appreciated. Pavel. On 5/7/09 7:01 AM, Francis E Reyes wrote: > Is there an option or a phenix.* utility to mutate a MR model to poly > ALA before the MR is done? >