Table 3 Structural parameters defined from the experimental SAXS data. I0, R g , V p and D max are, respectively, the forward scattering, radius of gyration, excluded volume and maximum size calculated from the scattering data. χs and χrb are discrepancies between the experimental data and computed scattering curves from typical ab initio and rigid body models (crystallographic model in case of free calmodulin).
Sample | I0, relative | Rg, nm | Vp, nm3 | Dmax, nm | χs | χrb |
|---|---|---|---|---|---|---|
Calmodulin | 95.0 ± 5 | 2.22 ± 0.05 | 34 ± 2 | 7.0 ± 0.5 | 0.8 | 2.4 |
Calmodulin+peptide | 108.0 ± 3 | 2.08 ± 0.05 | 39 ± 2 | 7.0 ± 0.5 | 0.8 | 1.1 |
Ratio | 1.14 | 0.94 | 1.15 | 1.0 | - | - |