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  • Title: Antigenic analysis of the repeat domain of the circumsporozoite protein of Plasmodium vivax.
    Author: Romero P, Heimer EP, Herrera S, Felix AM, Nussenzweig RS, Zavala F.
    Journal: J Immunol; 1987 Sep 01; 139(5):1679-82. PubMed ID: 2442254.
    Abstract:
    In the present study we analyzed the fine specificity of mouse monoclonal and human polyclonal antibodies directed against the repeat domain of the circumsporozoite (CS) protein of the human malaria parasite, Plasmodium vivax. Five synthetic peptides, representing monomeric and dimeric repeats of this malarial antigen, were assayed for their capacity to inhibit the binding of these antibodies to a yeast-derived recombinant CS protein. The results revealed the existence of at least two distinct repeated overlapping epitopes in the CS protein of P. vivax. Furthermore, polyclonal sera contain antibodies which recognize additional determinants not represented by the synthetic repeat peptides. Some of these sera contain antibodies recognizing a region flanking the repeat domain (region I). The present findings are in contrast with the antibody response in rodents and humans to the Plasmodium falciparum CS protein, which is directed against a single repeated immunodominant epitope.
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