Figure 2.

Examples of gamma distributions and associated survival functions. (a, b) The two parameters of the gamma distribution (p and β) permit description of a wide variety of distributions useful for representing the probability density function for myosin crossbridge attachment time, PDF_tatt(t). Notably, a single exponential results when p = 1 (a), and a Gaussian distribution is approximated as p increases. (c, d) The survival function, S_τ(t), refers to the probability that an attached crossbridge will survive to time t. The analytical relationship between the PDF_tatt(t) and S_τ(t) is provided by (10a) and (10b).