To add one more nugget, in your pdb you might see a
REMARK 3 MIN(FOBS/SIGMA_FOBS) : 1.36
or some such thing. Ignore it (I am not sure why this isn't closer to
zero, but that must be a result of French/Wilson). This is *not* your
observed criterion for sigma for F's, although I have seen it confuse
people to think so. Instead, go with Matthew's suggestion.
Engin
On 11/14/13, 9:25 AM, Matthew Franklin wrote:
> Dear Faisal -
>
> HKL2000 (Denzo/Scalepack) use I greater than -3 sigma (that's NEGATIVE
> 3) as the observed criterion, so that's what you would put down for
> this entry. There is another place where you're asked to provide an
> observed criterion for F's used during refinement. I always put down
> 0 (i.e. use all F's) for this one.
>
> I have no idea what Scala does.
>
> - Matt
>
>
> On 11/14/13 6:06 AM, 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)..
>>
>
>
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