FIG 6.

Fe⁰ oxidation by M. maripaludis strain JJ containing a putative genomic island for Fe⁰ corrosion. (A) Map of genes for Fe⁰ corrosion from M. maripaludis strain OS7. The mapped region, corresponding to nucleotides 1,131,633 to 1,137,117 from strain OS7, was introduced into M. maripaludis strain JJ or the indicated mutant strains on pLW40neo (pLW40-iron). The map was generated using SnapGene software (Insightful Science). (B and C) Fe²⁺ production in the presence of Fe⁰ in the absence (B) or presence (C) of formate. Fe²⁺ production was not observed in the absence of genes from panel A. Rates of Fe²⁺ production were compared to that of wild-type strain JJ containing pLW40-iron. Data are averages and standard deviations from three independent experiments. *, P < 0.05; **, P < 0.01; ***, P < 0.001.