title: Further studies on the question of the patency of saccules in outer segments of vertebrate photoreceptors.
mesh_terms: D000818:Animals; D001001:Anura; D010856:Columbidae; D005110:Extracellular Space; D005293:Ferritins; D000882:Haplorhini; D007811:Lanthanum; D051379:Mice; D008854:Microscopy, Electron; D010786:Photoreceptor Cells / Q000166:cytology*; D051381:Rats; D013194:Staining and Labeling
chemical_list: D007811:Lanthanum; D005293:Ferritins