Table 3. Mechanical Bending Parameters Deduced from in Silico Deformations^a.

system	PF8/1	PF16/1	PF24/1	PF32/1
EI × 10–26, N m2	1.8 ± 0.1	2.3 ± 0.2	2.6 ± 0.1	2.6 ± 0.1
Lp, μm	4.5 ± 0.3	5.7 ± 0.4	6.3 ± 0.2	6.3 ± 0.3

^aValues are averages with standard deviations of the flexural rigidity (EI) and persistence length (L_p) obtained from 5 bending simulation runs for single protofilaments of 8 (PF8/1), 16 (PF16/1), 24 (PF24/1), and 32 (PF32/1) tubulin dimers.