[ccp4bb] restraints for cis-bonds, ACD cif file

[Nathaniel C. Gilbert]

I have arachidonic acid soaked into my crystal structure and want to model it. 
The phenix.refine is allowing my cis double bonds to distort to a gauche or 
trans form. Is it the cif file or the refinement restraints in the program that 
I need to correct.