Table 1. Results of Fits to 2H and 17O MRD Profilesa.
| immobilized
Mb |
free-tumbling
Mb |
||||
|---|---|---|---|---|---|
| kb parameter (unit) | 2H | 17O | 2H | 17O | |
| 1 | τC,k (μs) | 5.6 ± 0.5 | [5.6] | ||
| 1 | Nk | 6.7 ± 0.8 | [5.2] | ||
| 1 | Sk | 0.79 ± 0.02 | [0.79] | ||
| 1 | ηk | 0.3 ± 0.1 | [0] | ||
| 2 | τC,k (ns) | 121 ± 10 | 32 ± 3 | 9.5 ± 0.5 | 5.6 ± 0.2 |
| 2 | NkSiso,k2 | 0.70 ± 0.03 | 1.0 ± 0.1 | 5.6 ± 0.3 | 3.0 ± 0.1 |
| 3 | τC,k (ns) | 6.0 ± 1.0 | 4.3 ± 1.0 | ||
| 3 | NkSiso,k2 | 3.6 ± 0.6 | 4.0 ± 0.6 | ||
| ξH | 7.3 ± 0.5 | 7.7 ± 0.4 | 5.7 ± 0.5 | 5.8 ± 0.1 | |
| χred2 | 1.16 | 0.36 | 1.17 | 0.21 | |
a
All four MRD profiles were measured at 25 °C and pD 7.0. Quoted errors correspond to one standard deviation, propagated from the uniform 0.5 or 1.0% uncertainty in R1. Parameter values within square brackets were fixed during the fit.
b
Component 2 has different physical origins in the four cases (see text).