Re: [ccp4bb]: Please teach about twinning

["Peter Mueller" <peterm@mbi.ucla.edu>]

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Dear Swami,

These tutorials are available already. See e.g.

http://shelx.uni-ac.gwdg.de/~rherbst/twin.html

Cheers,
Peter

Kunchithapadam Swaminathan <nathan@ima.org.sg> said:

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> 
> Dear :
> 
> In connection with the twinning discussion, I am open to admit that many of
> us are in the situation:
> 
> Everything you wanted to know about twinning but afraid to ask
> 
> Can some experienced and kind soul (including the program authors) post a
> mini tutorial, with protocols, pointers and computer program steps, for:
> 
> 1.  Symptoms of twinning (and details of the buzz words like twin factor,
> merohedral and hemihedral twinning)
> 2.  Data collection, reduction and correction 
> 3.  Structure determination and refinement
> 
> Obviously, there is a fear if you realize that a crystal is twinned and
> immediately we just throw the crystal away or pretend to do something, which
> leads to nowhere.
> 
> With regards,
> Swami
 
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Dr. Peter Mueller                                   fon: +1-310-825-1402
UCLA-DOE Laboratory of Structural Biology           fax: +1-310-206-3914
and Molecular Medicine
205 MBI
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