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AP-PCR banding patterns of 18 A. actinomycetemcomitans isolates representing 18 AP-PCR genotypes and 5 serotypes. Lanes: 1 and 2, serotype a; 3 to 8, serotype b; 9 to 12 serotype c; 13 and 14, serotype d; 15 to 17 serotype e; 18, nonserotypeable isolate; M, molecular size marker.
