title: A Markham rotation enhancement of two polygon types from isolated negatively stained human placental coated vesicles.
abstract: A simple image enhancement method has been used to reinforce the rotational symmetries of two types of polygon which form the facets of the clathrin lattice of human placental coated vesicles. Hexagons and pentagons were found but no evidence of other polygons (up to enneagon) was obtained.
mesh_terms: D002824:Chorionic Villi / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008854:Microscopy, Electron; D008958:Models, Molecular; D008967:Molecular Biology; D010920:Placenta / Q000166:cytology / Q000648:ultrastructure*; D011247:Pregnancy; D013194:Staining and Labeling; D014501:Uranium
chemical_list: D014501:Uranium