Serine‐stretch protein (SERP) of Plasmodium falciparum corresponds to the exoantigen Ag2, a target of antibodies associated with protection against malaria

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Abstract
A mixture of Plasmodium falciparum exoantigens inducing lymphocyte activation and cytokine production was shown to contain the malaria vaccine candidate, the serine-stretch protein. This protein was shown serologically to correspond to Ag2, an exoantigen recognized by antibodies linked with protection against malaria. The glycophorin-binding protein, the histidine-rich protein II, the S-antigen, the heat shock protein 70, the ring-infected erythrocyte surface antigen, and the apical membrane antigen-1 were also shown serologically to be present in the mixture of exoantigens.