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A 250 kDa antigen implicated in the induction of protective immunity to Plasmodium chabaudi was examined with a panel of 11 monoclonal antibodies in cloned parasite lines. 2 antibodies cross-reacted with the different parasite lines while 9 were specific for one line. This antigenic diversity was correlated with major differences in one dimensional peptide maps between the purified antigen from different lines of parasites. The peptide maps also revealed some apparently conserved structure which may have been responsible for the antigenic cross reactivity. Using cloned lines of P. falciparum and a second series of monoclonal antibodies, similar antigenic and structural diversity was evident in the equivalent antigen from the important human pathogen. These findings are discussed with relationship to the induction of protective immunity to malaria.

Type

Journal article

Journal

Mol Biochem Parasitol

Publication Date

04/1984

Volume

11

Pages

337 - 347

Keywords

Animals, Antibodies, Monoclonal, Antigens, Cross Reactions, Immunity, Malaria, Male, Mice, Molecular Weight, Peptides, Plasmodium, Species Specificity