On 24/01/2017 17:19, Uma Gabale wrote:
While refining a structure at 2.5 A resolution, we observed a semi-circular/crescent shaped electron density blob as shown in the attached picture. We have been unable to identify it so far, and would appreciate any help in identification.
If you have Coot: Extensions->Modelling->Add Other Solvent Molecules->Add New Residue Type->"PG4"->Add then click "PG4 Tetraethylene Glycol"