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On Mon, 21 Aug 2006, david lawson (JIC) wrote:
> Dear All,
>
> I would like to illustrate the improvement in phases and map quality at
> various stages of a structure determination (see recent post entitled:
> Molecular replacement in the "twilight zone" and space group problems).
> Specifically I would like to show plots of weighted mean phase error and
> map correlation vs resolution. One approach is to assume that the final
> model phases and map are "correct" and use PHISTATS and OVERLAPMAP
> respectively to evaluate the quality of the phases and maps at various
> stages relative to these, but I suspect there may be a better way of
> doing it - any helpful suggestions?
>
> Many thanks,
>
> Dave Lawson
Dear Dave,
I personally find phase scatter plots very useful in viewing phase
improvement. Examples can be found in Meth. Enzymology 277, 18-53.
As long as the "cloud" seen on these plots (phi1 vs phi2) get more compact
and more dense along the diagonal there is phase improvement.
Fred.
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