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Appl Environ Microbiol. 1992 Jul;58(7):2180-7.

Use of repetitive (repetitive extragenic palindromic and enterobacterial repetitive intergeneric consensus) sequences and the polymerase chain reaction to fingerprint the genomes of Rhizobium meliloti isolates and other soil bacteria.

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  • 1MSU-DOE Plant Research Laboratory, Department of Microbiology, E. Lansing, Michigan.


The distribution of dispersed repetitive DNA (repetitive extragenic palindromic [REP] and enterobacterial repetitive intergenic consensus [ERIC]) sequences in the genomes of a number of gram-negative soil bacteria was examined by using conserved primers corresponding to REP and ERIC sequences and the polymerase chain reaction (PCR). The patterns of the resulting PCR products were analyzed on agarose gels and found to be highly specific for each strain. The REP and ERIC PCR patterns of a series of Rhizobium meliloti isolates, previously ordered in a phylogenetic tree based on allelic variations at 14 enzyme loci (B. D. Eardly, L. A. Materon, N. H. Smith, D. A. Johnson, M. D. Rumbaugh, and R. K. Selander, Appl. Environ. Microbiol. 56:187-194), were determined. Isolates which had been postulated to be closely related by multilocus enzyme electrophoresis also revealed similar REP and ERIC PCR patterns, suggesting that the REP and ERIC PCR method is useful for the identification and classification of bacterial strains.

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