title: Editorial overview.
authors.affiliation: University of Michigan.
authors.forename: Ben
authors.initials: B
authors.lastname: Margolis
mesh_terms: D000818:Animals; D016764:Cell Polarity / Q000502:physiology*; D004848:Epithelium / Q000502:physiology*; D006801:Humans; D015398:Signal Transduction / Q000502:physiology*