We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleGerminal center dark and light zone organization is mediated by CXCR4 and CXCR5.AuthorsAllen CD; Ansel KM; Low C; Lesley R; Tamamura H; Fujii N; Cyster JGPublicationNature immunology, 2004, Vol 5, Issue 9, p943ISSN1529-2908Publication typearticleDOI10.1038/ni1100