FIG 2.

Acetate kinase (A) and lactate dehydrogenase (B) in vitro specific activities (sp act) of cells grown in M9 minimal medium containing 30 g liter⁻¹ glucose under high aeration, low aeration, and no aeration. The samples were harvested at mid-exponential phase, except under anaerobic conditions, where the activity was measured both in the exponential (E) and early stationary (S) phases (see Fig. S1 in the supplemental material for detailed information on sampling times). The results represent the averages ± standard deviations of duplicate measurements of at least two independent cultures.