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Results of RT-PCRs with RNA from M. catarrhalis. The primers used in the reactions were primers for the msp22, msp75, and msp78 genes, as indicated at the top. Lanes a, purified RNA amplified with RT; lanes b, purified RNA amplified with TaqI polymerase to exclude DNA contamination; lanes c, purified DNA amplified with TaqI polymerase; lane d, distilled water with RT as a negative control. The positions of molecular size markers (in kilobases) are indicated on the left.
