[phenixbb] Restraints on dihedrals in phenix.refine

hi phenix-bb in the standard phenix.refine scripts there are options for adding user defined restraints on bonds and angles, but not on dihedrals. Is this currently possible in phenix.refine? One application would be to restrain the phi-psi angles of a low resolution structure to phi-psi angles from a high-res structure of the same protein, an option previously made possible for xplor in the USF program XPLO2D gregers Gregers Rom Andersen Associate professor Department of Molecular Biology University of Aarhus Gustav Wiedsvej 10C DK8000 Aarhus C phone +45 89425024 fax +45 86123178 www.bioxray.au.dk/gra