Hi there,

I have 3 incomplete data sets, collected from 3 single crystals, each accounts 
for ~40% completeness. They have same resolution range, and randomly overlap 
with each other a small portion.

Mosflm and Scala work well for all 3 separately. The 2 from same beamline have 
very close statistics, while the 3rd from another beamline differs drastically. 
Reflections occuring both in the 1st and 3rd show amplitudes with large 
variance in either direction. The truncate process could be inaccurate because 
of low resolution. Knowing this I still have a few questions: 

1. is there alternate origin of unit cell for space group p321? 
2. does scala use all reflections in the reference data set to scale another? 
or just those occuring both in 2?
3. when scaling a data with a reference, does program work out an overall scale 
factor compared to reference, or a series of scales for different resolution 
shells? 
4. when combining 2 data, do people simply throw away redundancies, or use them 
for averaging? 
5. once all 3 combined, is it possible to make a statistics for this combined 
data set? 

Any suggestions are highly appreciated.

Yadong

Yadong Yu
Postdoctoral scholar
Department of Biochemistry and Biophysics, UCSF
Genentech Hall, Rm316
600 16th ST,
San Francisco, CA 94158
415-514-9708
[EMAIL PROTECTED]

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