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ERIC and two RAPD profiles representative of isolates from one person's mixed infection by closely related but nonidentical H. pylori strains (lanes 1 and 5 versus other lanes). As indicated by the arrows in ERIC and RAPD 1290 fingerprints, no more than one of the multiple bands observed in a given profile varied among these isolates; sometimes no difference was detectable (RAPD primer 1283).
