George,

perhaps you can use reference model restraints machinery to do this..? Or perhaps you can tweak corresponding values in mon_lib/list/mon_lib_list.cif file..?
Both ways may not be exactly what you want but may offer a reasonable work-around.

Why you would like to do this?

Pavel

On 7/30/14, 11:53 AM, George Devaniranjan wrote:

Hi

I was wondering if there is a way to restrain the omega angles of the structure being refined to its starting values while allowing the phi and psi dihedral angles to vary?

I was looking at 

omega_esd_override_value

discard_omega 

in phenix.real_space_refine.

Thank you,

George

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