On the cover: Lineage confirmation for cloned murine oviduct epithelial cell line Bm12.4. Cells fixed in ice-cold methanol were stained with anti-cytokeratin monoclonal Abs, demonstrating cytokeratin intermediate filaments characteristic of epithelial cells. Nuclei were counterstained with 4',6'-diamidino-2-phenylindole. Derbigny, W. A., M. S. Kerr, and R. M. Johnson. 2005. Pattern recognition molecules activated by Chlamydia muridarum infection of cloned murine oviduct epithelial cells lines. J. Immunol. 175: 6065–6075.