FIG 3.

Growth of M. acetivorans strains with different concentrations of sodium sulfide present as the sole sulfur source. The wild-type-like and Δma1715 strains are compared across the top row, whereas the OASS-OAHS double-knockout and OASS-OAHS-MA1715 triple-knockout strains are compared across the bottom row. All the data points represent averages of the results of at least four independent experiments. The error bars reflect standard deviations. Prior to each experiment, the strains were grown for at least 12 generations with 0.8 mM sodium sulfide as the sole sulfur source.