Need more info: how many degrees per frame? Also, on integration, do
various stats change over the 'sets?
JPK
On Wed, Jan 4, 2012 at 7:42 AM, Zhiyi Wei <[log in to unmask]> wrote:
> Dear all,
>
> I recently collected a dataset (~2000 frames) from a single crystal.
> If merge first 600 frames (sca1) or last 600 frames (sca2), Rmerge
> values from scalepack seem to be ok (~10%) though rejection ratios are
> high (~5%). But if I merge all frames together, Rmerge value goes up
> to ~20% and rejection is extremely high (~20%). Then, I checked sca1
> and sca2 by xtriage in phenix. Surprisingly, the logfiles told me that
> sca1 is no twining while sca2 is very likely to be twinned. I never
> met this case before. So, I am wondering if it is possible from a
> non-twinned structure to a twinned structure just due to radiation
> damage. If the answer is yes, does it mean that I should not collect a
> large number of frames to amplify anomalous signals by using this
> crystal?
>
> Thanks a lot!
>
> Best,
> Zhiyi
--
*******************************************
Jacob Pearson Keller
Northwestern University
Medical Scientist Training Program
email: [log in to unmask]
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