Table 2. χ and NSD values for protein ab initio models.
| Sample | DAMMIN | GASBOR | ||
| χa | NSDb | χa | NSDb | |
| CYT-18 NTDs | 1.8 | 0.63±0.03 | 1.8 | 1.10±0.02 |
| CYT-18 CTD | 1.7 | 0.49±0.02 | 2.2 | 0.78±0.02 |
| CYT-18* | 1.5 | 0.61±0.01 | 2.1 | 1.52±0.04 |
a
The discrepancy value (χ) describes the fit of the ab initio model to the experimental scattering curve. χ values close to 1 indicate a good fit between the models and SAXS data.
b
The NSD describes the similarity between different ab initio models produced by DAMMIN or GASBOR. A low value for the NSD (∼1) indicates the models are similar to each other.