Infection and Immunity, May 2000, p. 2899-2906, Vol. 68, No. 5
0019-9567/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Division of Parasitology, National Institute for Medical Research, London, NW7 1AA, United Kingdom,1 and Department of Parasitology, Biomedical Primate Research Centre, 2288GJ Rijswijk, The Netherlands2
Received 4 November 1999/Returned for modification 13 December 1999/Accepted 27 January 2000
We have purified apical merozoite antigen 1 (AMA-1) from extracts of red blood cells infected with the rodent malaria parasite Plasmodium yoelii yoelii YM. When used to immunize mice, the protein induced a strong protective response against a challenge with the parasite. Monoclonal antibodies specific for P. yoelii yoelii AMA-1 were prepared, and one was very effective against the parasite on passive immunization. A second protein that appears to be located in the apical rhoptry organelles and associated with AMA-1 was identified.
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