On the cover: Differential localization of B-1, IgD^high mature B-2, and MZ B cell compartments. Three-color staining of 3-mo V_H11t mouse spleen section with Alexa 488-anti-V_k9id, biotin-anti-IgD plus CB-avidin, and PE-anti-B220. Early expanded anti-PtC B-1 cells (green) in V_H11t mouse are closely associated with follicular dendritic cells, locating more centrally than B-2 (purple). Wen, L., S. A. Shinton, R. R. Hardy, and K. Hayakawa. 2005. Association of B-1 B cells with follicular dendritic cells in spleen. J. Immunol. 174: 6918–6926.