Table 2.
Helical parameters of F170A polyheads solved using an enhanced version of the Iterative Helical Real Space Reconstruction Method (IHRSR++) [36, 37]
| Diameter† (Å) | Cn symmetry | Δϕ (degrees) | ΔZ (Å) | Abundance†† |
|---|---|---|---|---|
| 438 | 2 | 38.6 | 24.7 | 0.071 |
| 463 | 1 | 131.8 | 11.5 | 1.000 |
| 489 | 4 | −57.8 | 42.5 | 0.171 |
| 518* | 3 | 32.3 | 31.5 | 0.326 |
| 530 | 1 | −82.6 | 9.8 | 0.273 |
| 653 | 4 | 24.2 | 31.2 | 0.041 |
†
Maximum outer diameter of each polyhead
††
Abundance is calculated by dividing the number of boxed segments corresponding to each helical form by the number of boxed segments from the most abundant form (the box size and shift were fixed for this calculation, although varying box sizes and shifts were used during the reconstruction based on differing ΔZ values).
*
Previously reported in Parent et al 2010. [36]
Cn, Δφ, and ΔZ are defined in Parent et al 2010. [36]