Hi Jin,
The text book might suggest metal ions, or even phosphorylation.....these do
require evidence in the form additional structure beyond the metal or
phosphorus though...
Bret
On 4/09/10 9:53 AM, "Jin H. Park" <[log in to unmask]> wrote:
>
>
> Dear CCP4 community,
>
>
>
> I have solved the structure. But, there seems oddly strong density above
> histidine residue.
> What could this density be?
> The protein was in Tris buffer, with NaCl and DTT, and crystallized in NaSCN
> with PEG.
> (electron density in the pictures is at 1.5 sigma)
>
> Thanks.
|