Mucosal IgA regulates the composition of gut microbiota. IgT in bony fish is now shown to have—via convergent evolution—the same properties as IgA, demonstrating strong evolutionary pressure to preserve both systemic and mucosal immunity.
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Flajnik, M. All GOD's creatures got dedicated mucosal immunity. Nat Immunol 11, 777–779 (2010). https://doi.org/10.1038/ni0910-777
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DOI: https://doi.org/10.1038/ni0910-777
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