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Several lines of evidence indicate a relatively low genetic heterogeneity in the natural Salmonella typhi population. However, some S. typhi isolates found in Indonesia express, instead of the usual fliC-d flagellin gene, a different flagellar gene fliC-j. In addition, Indonesian strains may have a second flagellar antigen fliC-z66. We have previously(More)
DNA hybridization with oligonucleotide probes is a powerful technique to study population genetics and structures. The use of probes which recognize ubiquitously interspersed DNA sequences has a distinct advantage over other techniques (e.g. the analysis of patterns of restriction fragment length polymorphism) in that many independent loci can be detected(More)
A second gene (rp-L21) copy, clone g34, coding for ribosomal (r-) protein L21, was isolated from the pathogenic (P) strain HM-1:IMSS cl6 of the intestinal parasite Entamoeba histolytica (Eh). The gene was compared to the previously isolated copy, gLE3 [Petter et al., Mol. Biochem. Parasitol. 56 (1992) 329-334], with respect to its primary structure, mRNA(More)
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