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Growth physiology of the wild-type (WT) and hyd and hmc mutant strains in WP medium containing lactate (38 mM), sulfate (28 mM), and a headspace of 10% (vol/vol) CO2 and 90% N2. Plotted as a function of time are cell density (A), lactate concentration (B), H2 concentration in the headspace (C), sulfate concentration (D), acetate concentration (E), and CO concentration in the headspace (F). The symbol definitions in panel D apply to the entire figure.
