title: Molecular structure determination by electron microscopy of unstained crystalline specimens.
mesh_terms: D000818:Animals; D001436:Bacteriorhodopsins; D002338:Carotenoids; D002374:Catalase; D002417:Cattle; D005583:Fourier Analysis; D005947:Glucose; D006217:Halobacterium; D008099:Liver / Q000201:enzymology*; D008854:Microscopy, Electron / Q000379:methods*
chemical_list: D002338:Carotenoids; D001436:Bacteriorhodopsins; D002374:Catalase; D005947:Glucose