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Mol Biochem Parasitol. 1996 Jun;78(1-2):47-54.

A homologue of the cysteine proteinase gene (ACP1 or Eh-CPp3) of pathogenic Entamoeba histolytica is present in non-pathogenic E. dispar strains.

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Department of Membrane Research and Biophysics, Weizmann Institute of Science, Rehovot, Israel.


One of the three cysteine proteinase genes, ACP1 (or CP 3), has been reported to be missing in non-pathogenic strains of Entamoeba histolytica (or Entamoeba dispar as recently labeled). Unexpectedly, a gene fragment very similar in its sequence (95% homology) to ACP1 of pathogenic strains was obtained by use of the polymerase chain reaction from genomic DNA and cDNA of various cloned non-pathogenic strains as well as in 23 clinical isolates from asymptomatic carriers. The finding of the ACP1 homologue in non-pathogenic or E. dispar strains rules out the proposed use of its absence for diagnostic purposes.

[Indexed for MEDLINE]

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