On the cover: The illustration shows a mouse colon rolled up, sectioned, and stained with anti-IgM (red) and anti-IgA (green) Abs. Isolated lymphoid follicles and colonic patches appear as red areas, and IgA-producing plasma cells in the lamina propria are stained green. Bergqvist, P., A. Stensson, N. Y. Lycke, and M. Bemark. 2010. T cell-independent IgA class switch recombination is restricted to the GALT and occurs prior to manifest germinal center formation. J. Immunol. 184: 3545–3553.