Dear All,
After I send out the 'SOS' for my multi-copy problem, I have received many
good suggestions and tips. Many thanks to all of you.
Now my problem has been solved:
1, There are only 4 molecules in a.u, even the solvent containt is high,
it is not uncommon for a data with low resolution and high symmetry.
2, CNS anneal can do the magic work to get rid of un-even density
distribution among all 4 chains.
3, Now my R-value is 36% R-free is 41% around. Few turns fiting can finish
my structure up, I think
Crystallographers in the world is like one family. One difficulty, many
helps! Thank you all for your kind replies and your times.
Yanming
On Wed, 14 Feb 2007, Petrus H Zwart wrote:
>> This isnt any real help but I cant solve a ferritin structure in
>> SG I432
>> - it probably forms a cage like the other feritins around the
>> origin,
>> but every solution I get clashes with others..
>> After listening to a lecture by a small molecule crystallographer
>> I
>> wondered whether there isnt some crystal defect but I am not sure
>> how to
>> monitor it..
>> Eleanor
>
>
> Hi Elenaor,
>
> Your problem reminds me of this paper:
>
> http://journals.iucr.org/a/issues/2004/04/00/lc0065/index.html
>
> Not sure if it is related (probably not), but the phenomenon itself is interesting
>
> Cheers
>
> Peter
>
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