title: Preparation of unstained protein structures for mass determination by electron scattering.
mesh_terms: D002213:Capsid; D004583:Electrons; D006023:Glycoproteins; D008854:Microscopy, Electron / Q000379:methods*; D008970:Molecular Weight; D011485:Protein Binding; D011506:Proteins; D012542:Scattering, Radiation; D013604:T-Phages / Q000648:ultrastructure
chemical_list: D006023:Glycoproteins; D011506:Proteins