Table 1. Fluorescence lifetimes, its relative amplitudes, amplitude-weighted average fluorescence lifetimes, measured fluorescence quantum yields and calculated non-radiative (k_nr) and radiative (k_r) rates of WT AR-3 and mutants at pH 6.

Sample	τ 1, ps	A 1, %	τ 2, ps	A 2, %	〈τfluo〉, ps	Φ f	k nr, ns−1	k r, ns−1
AR 3 pH 6	0.34 ± 0.02	85 ± 2	1.4 ± 0.1	15 ± 2	0.5		2000
DETC pH 6	7.7 ± 1.1	37 ± 6	42 ± 3	63 ± 6	29	3.6 ± 0.6 × 10−3	34	0.12
ARCH-5 pH 6	31 ± 8	43 ± 9	91 ± 15	56 ± 3	66	9 ± 1 × 10−3	15	0.14