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Sensitivity of the Porphyromonas gingivalis bcp mutant to hydrogen peroxide. The P. gingivalis was grown to early log-phase (OD600 0.2) in brain–heart infusion broth and 0.25 mM hydrogen peroxide (▲ W83, □ FLL302) was then added to the cell cultures and incubated for a further 16 h. Cell cultures without hydrogen peroxide (♦ W83, ○ FLL302) were used as controls. The results shown are representative of three independent experiments performed in triplicate.
