Fig. 3

Dynamics of isotopically dilute samples. Samples have final pyridine concentrations of 50 mM. a DARTH dynamics of natural abundance pyridine with delays τd = 25 ms, making the dynamics quasi-CW. b DARTH dynamics of 15% labeled pyridine with delays τd = 600 ms. Data are shown fit to numerical simulation with an average PTC lifetime of 20 ms