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Metal uptake in P. gingivalis strains. (A) Active uptake of 55Fe2+ in strains W83 (parental strain) and V2897 (feoB1 mutant) was determined under anaerobic conditions, using 0.46 μM radiolabeled iron. (B) Active uptake of 54Mn2+ was examined using 0.05 μM radiolabeled manganese. Experiments were performed in triplicate.
