title: Ciliary granule plaques: membrane-intercalated particle aggregates associated with Ca2+-binding sites in paramecium.
abstract: In Paramecium nine rectangular aggregates of membrane-intercalated particles surround the freeze-cleaved membrane of the ciliary base. These "ciliary granule plaques" occur independently of the "ciliary necklace" which is observed in a more basal position on some cilia. In each individual plaque the approximately 10 nm large granules are arranged in a square grid pattern: the granules of one plaque invariably form 3 vertical rows (number of horizontally arranged particles per row: Nh = 3) and 3-6 horizontal rows (mean value fos intrahepatic tributaries then can be approached under direct vision in a relatively bloodless field for safe, accurate liquation and/or reconstruction.
mesh_terms: D000818:Animals; D001665:Binding Sites; D002118:Calcium; D002462:Cell Membrane / Q000648:ultrastructure; D002923:Cilia / Q000648:ultrastructure*; D003594:Cytoplasmic Granules / Q000648:ultrastructure*; D005614:Freeze Fracturing; D005976:Glutaral; D006652:Histological Techniques; D008854:Microscopy, Electron; D008953:Models, Anatomic; D010247:Paramecium / Q000648:ultrastructure*
chemical_list: D002118:Calcium; D005976:Glutaral