Hard to say without more information.
Have you refined the B factors for these residues? Most building
software gives some arbitrary b value, which must then be refined. (In
fact after any rebuilding activity you need to do a few cycles of
refinement before looking at the maps again)
Eleanor
Sun Tang wrote:
> Hello Everyone,
>
> When I refined a structure, I found strong difference density Fo-Fc at 3 sigma contour for the for five residues which already have occupancy of 1. The density is continuous and so strong as if I did not put the residues there. Why was that? Can I put greater than 1 occupancy for those residues?
>
> Thank you very much for your opinions and suggestions!
>
> Best wishes,
>
> Sun Tang
>
>
> ---------------------------------
> Never miss a thing. Make Yahoo your homepage.
>
|