[phenixbb] Anisotropic B-factors with Trucated Data

Pavel Afonine pafonine at lbl.gov
Fri Jul 31 22:22:01 PDT 2015

Hi Jacob,

> Actually, I think I found how to override the iso/aniso decision: under "global parameters," set aniso cutoff to lower resolution. Seems to be working.

Ok, let me know if it still does not do what you want.

Also you can always do:

Refinement settings -> Modify selections for: choose "Individual 
B-factors" and you will get a pop up menu, where you can tell what atoms 
need to be isotropic and what atoms need be anisotropic. For example you 
can type:

Isotropic atoms: water
Anisotropic atoms: not water

> Any thoughts on the more general question about aniso refinement in the case of truncated data, or +/- twinning?

Try both and see which one works best.

> Seems twinning changes ML refinement to LSQ, but I am not sure how that changes this.

phenix.refine uses LS in case of twining.


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