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Relative batB mRNA levels in B. bronchiseptica, B. pertussis, and B. parapertussishu. qRT-PCR was used to determine the relative levels of batB transcripts in B. bronchiseptica, B. pertussis, and B. parapertussishu grown in Bvg+-phase conditions (gray bars) or Bvg−-phase conditions (black bars).
