Figure 3From: M cell targeting by a Claudin 4 targeting peptide can enhance mucosal IgA responsesImmune response to Recombinant fusion protein. Recombinant protein vaccine and a basic four week intranasal immunization protocol, showing enhanced IgA responses by CPE targeting. Systemic serum IgG responses were also induced, without improvement by CPE targeting. A, Immunization protocol. B, ELISA results, showing increased IgA response to HA-CPE protein.Back to article page