[phenixbb] Negative density

Tim Gruene tg at shelx.uni-ac.gwdg.de
Fri May 22 00:20:50 PDT 2015

Dear mohamed noor,

this could be noise, or due to missing low resolution reflections, due to
fourier truncation errors, i.e. many things that you cannot really model.

Given the seemingly medium resolution of your data you may leave it as is. If
you can further improve your model at other places, this blob may go away.


On Thu, May 21, 2015 at 10:41:19PM +0100, mohamed noor wrote:
> Dear all
> After refinement, there is a single negative peak in my map where nothing
> is modeled. What does it mean?
> Thanks.

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Dr Tim Gruene
Institut fuer anorganische Chemie
Tammannstr. 4
D-37077 Goettingen
phone: +49 (0)551 39 22149


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