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The pyrograms indicate the two polymorphic sites that were consistently associated with serotypes 6A and 6B. The regions above each graph correspond to the specific SNPs used for differentiation. The two 25-base wciP coding sequence segments from the type 6A and 6B isolates examined during this work are depicted. The key residue within rhamnosyl transferase that putatively determines the key structural difference between the 6B and 6A serotypes is underlined (8).
