Substructure in the iron core of ferritin molecules.
D005293:Ferritins / Q000032:analysis*; D007501:Iron / Q000032:analysis*; D008854:Microscopy, Electron; D010772:Phosphotungstic Acid; D013194:Staining and Labeling
D010772:Phosphotungstic Acid; D005293:Ferritins; D007501:Iron