| http://www.w3.org/ns/prov#value | - A method of enhancing expression of a desired protein at mucosal effector sites, the method including placing the protein to be expressed under the control of a promoter having SEQ ID NO: 2, SEQ ID NO: 3 or SEQ ID NO: 4, or a fragment or variant of any of these that has promoter activity, and causing expression in mucosal cells.
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