Elsevier, Immunity, 5(37), p. 768-770, 2012
DOI: 10.1016/j.immuni.2012.10.011
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Immunoglobulin A (IgA) is the main intestinal antibody. In this issue of Immunity, Chen et al. (2012) show that intestinal T cells enhance protective IgA responses by expressing a short isoform of the CEACAM1 protein.