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Gel electrophoresis analysis of PCR tests using the 181 bp B. pertussis DNA amplification chemistry. Gel a displays the results of a solution-based test, and gel b shows the results of a bead-based test. In both gels, lane i is a sample of PCR products mixed with loading buffer, and lane ii is a 100 bp ladder (dsDNA for length reference). Arrow indicates the direction of DNA movement, with smaller strands migrating faster
