[ccp4bb]: Questions about translational NCS

[Jianghai Zhu <zhu5@purdue.edu>]

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Hi, all,

I have several questions about translational NCS. 

1) If I have a pure translational NCS, I can find a peak in my 
native patterson map. But if I have a NCS happen to be parallel 
to my crystallographic symmetry, they generate some 
translational vectors and I can find a peak in my native 
patterson map too. How do I know it is a pure translational NCS 
or a NCS parallel to the crystallographic symmetry?

2) I was told that the translational NCS could make the data 
look like a data from a twinning crystal. Is that true? If it 
is, could somebody explain it to me or point out some 
reference? Will the pure translational NCS and NCS parallel to 
crystallographic symmetry give the similar intensity 
distribution? 

Thanks.

Jianghai
-- 
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Jianghai Zhu
Biochemistry & Molecular Biology
Purdue University
Tel: 765-4949249 (O)
      765-4633336 (H)
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