Table 4. Comparison between experimental and theoretical PF skew angles.
| GDP | BeF3- | GMPCPP | ||||
|---|---|---|---|---|---|---|
| MT type | 13_3 | 14_3 | 12_3 | 13_3 | 13_3 | 14_3 |
| θexp | +0.10 ± 0.21 (n = 15) |
−0.62 ± 0.05 (n = 27) |
+0.60 ± 0.05 (n = 52) |
−0.27 ± 0.07 (n = 9) |
+0.33 ± 0.11 (n = 12) |
−0.51 ± 0.04 (n = 12) |
| θthe | +0.05 | −0.74 | +0.61 | −0.31 | +0.37 | −0.44 |
Theoretical PF skew angles (θthe) were calculated according to Equation 9, using a = 40.9 Å, r = 9.4 Å, and δx = 48.95 Å for GDP-MTs. For GMPCPP MTs, the monomer spacing a was increased to 42.1 Å, and for BeF3- the inter-PF subunit rise was increased to 9.7 Å.