[phenixbb] difference density maps

Pavel Afonine PAfonine at lbl.gov
Wed May 6 11:57:43 PDT 2009

Hi Raj,

> We looked at an fobs-(fobs-fcalc) map and see density and 5 sigma at each
> catalytic active site in roughly the same place, its not great, but it
> seems like there is something there.

I might be missing something, but the fobs-(fobs-fcalc) map to me seems 
like a simple fcalc map, where it's not too surprising that you see 

Which PDB model did you use as a phase_source in 

If you like, you can send me the two data files and a PDB file and tell 
where you are expecting to see the differences. I will then play with 


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