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Kinetic analysis of SP. A, dwell time histogram of SP at 4 mm ATP. The histogram was fitted with a single exponential function of 4.2 ± 0.3 s. B, histogram of rotation time between SPs. Single exponential fitting gave the time constant of inactivation into the SP state as 0.9 ± 0.04 s. The number of molecules and trials were 7 and 250, respectively.
