FIG. 7.

Lactate-grown A. actinomycetemcomitans contain higher levels of pyruvate. Intracellular levels of pyruvate were measured for logarithmic glucose-, fructose-, and l-lactate-grown A. actinomycetemcomitans as previously described (1) and are presented as fold increases during growth with l-lactate. Error bars represent the standard deviation, and experiments were performed in triplicate. Intracellular volume was calculated based on normal size measurements of A. actinomycetemcomitans (1.6 μm by 0.5 μm by 0.5 μm).