TABLE 2.
Data collection and scattering derived parameters for ScF using SAXS
| Data collection parameters | |
| Instrument | Bruker NANOSTAR |
| Beam geometry | 100-μm slit |
| Wavelength (Å) | 1.3414 |
| q range (Å−1) | 0.01–0.5 |
| Exposure time (min) | 30 |
| Concentration range (mg/ml) | 2 and 4.2 |
| Temperature (K) | 288 |
| Structural parametersa | |
| I(0) (cm−1) (from P(r)) | 999.9 ± 7 |
| Rg (Å) (from P(r)) | 19.6 ± 0.3 |
| I(0) (cm−1) (from Guinier) | 1007 ± 7 |
| Rg (Å) (from Guinier) | 19.3 ± 0.6 |
| Dmax (Å) | 67.5 ± 3 |
| Porod volume estimate (Å3) | ∼32,831 |
| Dry volume calculated from sequence (Å3) | 15,903 |
| Molecular mass determinationa | |
| Calculated monomeric Mr from sequence | 13,144 |
| Mr from I(0) | 21,305 |
| Mr from SAXS MoW | 24,100 |
| Mr from excluded volume | 23,200 |
| Software employed | |
| Primary data reduction | SAXS |
| Data processing | PRIMUS |
| Ab initio analysis | DAMMIN |
| Validation and averaging | DAMAVER |
| Rigid body modeling | CORAL |
| Computation of model intensities | CRYSOL |
| Three-dimensional graphics representations | PyMOL |
a Data are reported for 2 mg/ml measurements.