Dear Simon,

low B factors might indicate a higher number of electrons, i.e. an atom
larger than oxygen, like for example a metal cation (calcium etc.) of an
anion (chloride etc.). Take a look at the environment arounf the "strange"
solvent molecule.

Oliviero


On Thu, December 13, 2007 22:36, Yue Li wrote:
> Hi all,
>
> When I refined one of my structures in refmac and cns, I found some water
> molecules having low B factor (i.e  < 10). Should I omit these water
> molecules from the structure ? The overall B factor is 35.3
>
> Thanks
>
> Simon
>
>

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