[phenixbb] anomalous completeness from Phenix Xtriage result
alexlee198609 at gmail.com
Thu Jan 21 16:58:21 PST 2016
After check my data with Phenix Xtriage, I got a warning of "the anomalous
completeness is 42.34%".
I do not know if I need to pay attention to this? I did not do experimental
phasing and I did not add heavy metal to my crystal nor there is selenium
on my protein. I even don't know why I still get the anomalous signal.
But from the detailed summary below I guess in my case it's not a problem?
Space group: P
1 2 1
Unit cell: 72.255, 46.617, 134.086, 90,
Resolution: 49.1682 -
Number of reflections (non-anomalous):
Number of reflections (all):
Completeness (non-anomalous) is the completeness of the data after merging
Completeness (all) is the completeness of the data before merging Friedel
Completeness (anomalous) is the completeness of the anomalous data. The
anomalous completeness is calcluated by dividing the number of measured
acentric, Bijvoet mates by the total possible number of acentric indices.
Completeness (non-anomalous) should be used to determine if there is
sufficient data for non-anomalous purposes (refinement, model-building).
A value greater than 90% is generally desired, while a value less than
75% is considered poor. Values in between will provide less than optimal
Completeness (anomalous) should be used to determine if there is
data for anomalous purposes (phasing, finding anomalous atoms, refinement
of anomalous occupancies or scattering factors). A value greater than 80%
is generally desired, while a value less than 50% is considered poor.
in between will provide less than optimal results.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the phenixbb