Re: [phenixbb] Can geometry restraints include non-ideal target values?

I have used 3 programs to refine RNA structures recently: CNS, Refmac and Phenix. Of these, only CNS has the temerity to enforce what it thinks is a correct sugar pucker to the extent that it will pull atoms out of the electron density. Refmac and Phenix both do a much better job of refining non-canonical sugar puckers in RNA in my experience. Joe Krahn wrote:

I see that phenix is using the same kind of simplistic statistical restraints as CCP4. Are there plans to improve the geometry restraints once the rest of phenix is stable?