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Cellular iron and nickel content of Cff WT, pglX-, and pglJ- strains. Atomic absorption spectroscopy (AAS) was employed for the detection of (A) iron (Fe) and (B) nickel (Ni) in lysed cells of the indicated strain. Data are presented as the mean of at least three replicates, error bars depict the standard deviations. Statistically significant differences determined by a two-tailed t-test are indicated.
