Table 4.
Lifetimes, pre-exponential factors and average lifetimes as a function of pH for the transient species formed upon lysozyme excitation
| Wavelength/species | Molecule | pH | Mean lifetime | Lifetimes and pre-exponential factors for global fitting | R2 | ||
|---|---|---|---|---|---|---|---|
| τ1 (μs) | τ2 (μs) | τ3 (μs) | |||||
| 330 nm (0-50μs data set) | |||||||
| Trp· | Lysozyme | 1.45 ± 0.12 | 17.2 ± 2.24 | 0.89206 | |||
| 〈τ〉(μs) | α1 | α2 | α3 | ||||
| 4.0 | 12.5 | 0.57 ± 0.03 | 0.43 ± 0.02 | ||||
| 7.5 | 14.0 | 0.54 ± 0.03 | 0.46 ± 0.02 | ||||
| 8.5 | 11.5 | 0.59 ± 0.03 | 0.41 ± 0.02 | ||||
| 10.0 | —- | —- | —- | ||||
| τ1 (μs) | τ2 (μs) | τ3 (μs) | |||||
| 520 nm (0–50μs data set) | Lysozyme | 0.71 ± 0.01 | 11.0 ± 1.4 | 0.97227 | |||
| Trp· | 〈τ〉(μs) | α1 | α2 | α3 | |||
| 4.0 | 9.4 | 0.74 ± 0.03 | 0.26 ± 0.02 | ||||
| 7.5 | 7.1 | 0.90 ± 0.01 | 0.10 ± 0.01 | ||||
| 8.5 | 7.5 | 0.89 ± 0.01 | 0.11 ± 0.01 | ||||
| 10.0 | —- | —- | —- | —- | |||
| Lysozyme370 nm (0–1 ms data set)(RSS(R)SR)· | τ1 (μs) | τ2 (μs) | |||||
| 3.63 ± 0.18 | 300 ± 40 | ||||||
| 〈τ〉(μs) | α1 | α2 | |||||
| 410 nm (0–1ms data set) | 4.0 | 286 | 0.80 ± 0.04 τ1 (μs) | 0.20 ± 0.01 τ2 (μs) | 0.87372 | ||
| RSSR •− | 7.5 | 476 | 3.81 ± 0.160.79 ± 0.03 | 480 ± 700.21 ± 0.03 | 0.90144 | ||
| 8.5 | 477 | 0.73 ± 0.03 | 0.27 ± 0.02 | ||||