TABLE 2.

Fluorescence lifetimes of gramicidin in SDS micelles

Host*	α1	τ1 (ns)	α2	τ2 (ns)	τ† (ns)
SDS micelles	0.91	0.60	0.09	3.12	1.46
SDS micelles (in the presence of 0.5 M NaCl)	0.98	0.64	0.02	3.39	0.91

^*The excitation wavelength was 297 nm; emission was monitored at 340 nm. All other conditions are as in Fig. 1. See Materials and Methods for other details.

^†Calculated using Eq. 5.