I presume you set te occupancy to 0.5? if it is a 2fold..
eleanor

On 26 May 2017 at 19:35, jeorgemarley thomas <kirtswab...@gmail.com> wrote:

> Dear all,
> I encountered a positive density of water molecule (probably) at the
> symmetry axis of the protein molecule (resolution 1.75 Ang) . After
> refinement with water it shows negative density around it. Can anybody
> please explain the possible reason for this and how such problems can be
> resolved.  I am attaching the snapshots of situation before and after
> refinement.
>
> Thank you
> regards
> Jeorge
>

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