[phenixbb] secondary structure restraints helices/helixes proline

Hi guys, How does phenix.refine handle prolines in helices? When I look in high resolution structures it seems that the carbonyl of the residue four positions before the proline (also in the helix) should be more perpendicular than parallel to the helix. This makes sense since there isn't any nitrogen for it to hydrogen bond to. But when I refine my structure it seems as if phenix.refine is trying to push the carbonyl into parallel position. Am I imagining things? It's not the best data and this is a troublesome region. Cheers, Morten -- Morten K Grøftehauge, PhD Pohl Group Durham University