Hi,
On 5/22/10 8:23 PM, Zhang, Hailiang wrote:
> Thanks a lot! Actually my map has very weak density at only certain region, and I want to numerically say that this region is "weakly" correlated to the atomic map at this region. But according to the CC formula, if investigating by residue, CC only depends on the relative "shape" of the density, NOT the relative "density".
This is exactly why I suggested to look at the triplet of values {map
CC, 2mFo-DFc, mFo-DFc}. The map CC will tell you similary of shapes,
indeed, and the two maps (2mFo-DFc, mFo-DFc) will tel you how to qualify
this similarity.
> Instead, I think real-space R will reflect the weak density.
Just of out curiosity... Could you tell me please: is real-space
R-factor=27% is good, poor, acceptable (and why)? How it relates to the
real-space R-factor? What is the typical value for structures refined at
1, 2 and 3A resolution?
Pavel.
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