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Locations and numerical designations of PCR amplification and DNA sequencing primers for M. haemolytica and M. glucosida strains (A), P. trehalosi strains PH68, PH246, and PH252 (B), and P. trehalosi strain PH254 (C). The relative positions of the primers are represented by arrows; the primers used for PCR amplification are indicated by bold arrows. Arrows beneath gene names indicate the direction of transcription.
