As I understand it this refers to the decision whether an observation is valid or not, and
the default value in HKL suite is -3 sigma (note the negative sign). The
denzo/scalepack manual explains that while it is important not to exclude
observations
that are slightly negative due to random errors of measurement, anything that
comes
in below -3 sigma is likely to be a fluke and should be discarded.
I'm not sure whether this refers to measurements before adding partials, or to
the
summed full reflection observation. anyway, I always put -3s for that value
and haven't had any negative feedback from the annotators.
Faisal Tarique wrote:
Dear all
I request you to please explain the "Observed criterion sigma" value
required during pdb deposition. Does it depends on the methods of data
integration and scaling ? if yes then what are the values for the data
processed through scalepack2mtz (HKL2000) and scala (mosflm)..
--
Regards
Faisal
School of Life Sciences
JNU
