... enlarged view of (A),showing only the data obtained in the absence of Du.(C)Theratioof the best-fitting functions and of the data points of wild-type overmutant are plotted for data in the presence ... ms(extrapolating the fittin g function when necessary). The ratios of the wild-type derivatives over the mutant, indicating the ratios of the ATPsynthesis rates, are plotted for the exp eriments in the ... enlarged view of Fig. 3A showing only the r atesobtained in the absence of a Du. In this case, the impairment of the ATP synthesis rates in th e mutant was higher thantwofold, especially in the low...