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Comparison of the growth of M. acetivorans in the presence (closed) or absence (open) of NH4Cl in HS medium with Mo + Fe (green squares), V + Fe (blue diamonds), or Fe alone (red circles). Inoculum: stationary phase cells grown in Mo-depleted HS medium with NH4Cl. Error bars represent mean ± 1 SD from at least three biological replicates.
