Fig. 7. The plot shows the variation of the mean visibility index (1), which is calculated as the normalized modulation in intensity for a slack test on a typical nonactivated myofibril. The high- and interplateau slopes are shown (thin lines), with the intercept corresponding to the frame at which the myofibril is first back in focus, following release (arrow). Error bars are marked at one standard error from the mean.
1. Hecht, E. (1987) Optics, ed. Spatz, B. (Addison–Wesley, Reading, MA), 2nd. Ed., pp. 519–522.
