FIG. 2.

Effect of lack of a component of the respiratory chain on the relative fitness of a gdhA mutant during glucose-limited growth as a function of phosphate concentration. Symbols: ▪, competition between a gdhA1 mutant and the wild type (22); ⧫, a similar competition but both strains are deficient in the NDH2 dehydrogenase; ▴, a similar competition but both strains are deficient in the CYO oxidase; •, a similar competition but both strains are deficient in the CYD oxidase. The vertical bars represent the standard error.