Stacy, It looks like it's just some noise on your two-fold symmetry axis. You could probably model some/most of it with a couple of water molecules.
Tony. On 19 Jan 2012, at 06:44, stacy William wrote: > Dear All, > I am working on plant proteins and solved a structure, there is an extra > density which i cannot fix . I am attaching the coot image , can anybody > suggest me what it could be > > THANKS :) > <coot1.png><coot2.png>
