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Silver-stained polyacrylamide gels with LPS preparations of various Bordetella strains. The positions of band A and band B are indicated. O-specific side chains in the BB7865, BB7866, and BB-PS2 strains are visible as a diffuse cloud above band A. Abbreviations: BB 7865 PS1, PS2, and PS3, mutants BB-PS1, BB-PS2, and BB-PS3, respectively; Bp TI, B. pertussis Tohama I; Bp 347, B. pertussis BP347.
