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Amplification of 90 S. pneumoniae serotypes using primers P1 and P2. Agarose gel electrophoresis of PCR-amplified products from serotypes (838-bp fragment) is shown. Serotype designations are indicated above the lanes. (A) Serotypes 1 to 10F; (B) serotypes 11A to 18F; (C) serotypes 18C to 28F; (D) serotypes 29 to 41A; (E) serotypes 41F to 48.
