Primary structure of the precursor to the three major surface antigens of Plasmodium falciparum merozoites

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Abstract
Recently, a class of protein antigens of high relative molecular mass (Mt) which can induce protective immunity against blood-stage malaria has been identified. In Plasmodium falciparum the protein has a Mr of approximately 195,000 (P195). It is the precursor of three proteins of Mr 83,000 (83K), 42K and 19K which are the major surface antigens of merozoites; thus it may also be useful for immunization against P. falciparum. Three studies describing the isolation of single short complementary DNA clones for part of the P195 gene sequence have been reported. Here we describe the complete structure of the P195 gene determined from further DNA clones, its organization within genomic DNA and the location of the specific processing fragments within the primary amino-acid sequence.

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