title: Everything in its place.
abstract: In this issue of Immunity, Griffith et al. (2009) define the thymic midcortex as a functionally inert zone between subcapsular and cortico-medullary regions, and Ehrlich et al. (2009) infer that structural features of the cortex and medulla regulate migration of thymocytes.
authors.affiliation: Max-Planck Institute of Immunobiology, Department of Developmental Immunology, D-79108 Freiburg, Germany.
authors.forename: Jeremy B
authors.initials: JB
authors.lastname: Swann
authors.forename: Thomas
authors.initials: T
authors.lastname: Boehm
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000276:immunology; D002465:Cell Movement / Q000276:immunology; D051379:Mice; D015398:Signal Transduction / Q000276:immunology; D016176:T-Lymphocyte Subsets / Q000276:immunology* / Q000378:metabolism; D013950:Thymus Gland / Q000276:immunology* / Q000378:metabolism