Hi All,

I have a couple of questions about X-ray/neutron joint refinement in phenix.

Is it possible to use the neutron data only for refining hydrogen atom positions and the X-ray data for all other atoms?

I used the option to add hydrogen atoms to model and refine H/D at exchangable sites and H elsewhere.    

This worked for many of the exchangeable hydrogen atoms.  However, for some side chains, especially Lysine, the program has placed a hydrogen and deuterium atom (with refined occupancies) in the same position as the atom it is supposed to be bonded to. 

Does anybody know why this is happening and what I may be able to do about it.  Or will I need to manually move each misplaced H/D in Coot?

Thank you for your help.

Emily