title: Ultrastructural aspects of membrane fusion.
mesh_terms: D002462:Cell Membrane / Q000378:metabolism* / Q000648:ultrastructure; D002477:Cells; D005089:Exocytosis; D005614:Freeze Fracturing; D008854:Microscopy, Electron; D008954:Models, Biological; D009940:Organoids / Q000378:metabolism*; D013768:Tetrahymena / Q000648:ultrastructure