Table 2.
Persistence length P, bending modulus CB, and Young's modulus Y of different systems
| P (nm) | CB (N m2) | Y (Pa) | Reference | |
|---|---|---|---|---|
| HypF-N protofibrils (population 1) | 69 ± 3 | (2.9 ± 0.1) × 10−28 | 5 × 108 | Present work |
| HypF-N protofibrils (population 2) | 10 ± 1 | (4.2 ± 0.4) × 10−29 | 6 × 107 | Present work |
| α-Lactalbumin protofibrils | — | 1.4 × 10−28 | 1.4 × 108 | (13) |
| Insulin amyloid fibrils | 42 ± 30 | (1.7 ± 1.2) × 10−25 | (6.3 ± 4.5) × 109 | (27) |
| Sickle cell hemoglobin fibers | 2.4 × 105 | 1.0 × 10−24 | 1.0 × 108 | (34) |
| DNA | 52 ± 2 (a) | — | 2.9 × 108 (b) | (a) (35) |
| (b) (36) | ||||
| Collagen, single fibril | — | — | 1 − 5 × 109 | (37) |
| Microtubules | 1 − 8 ×106 (a) | — | 1 × 108 (b) | (a) (38) |
| (b) (39) | ||||
| Vimentin intermediate filaments | 0.3 − 1 ×103 (a) | — | 9 × 108 (b) | (a) (38) |
| (b) (40) | ||||
| Yeast cells | — | — | 1 × 106 | (41) |
| Bone | — | — | 1 × 1010 | (42) |
| Rubber | — | — | 1 × 106 (a) | (a) (42) |
| 1 × 107 (b) | (b) (13) |
Values of persistence length, bending rigidity, and Young's modulus obtained in this work for HypF-N protofibrils are compared with the values reported in the literature for several biological assemblies and bulk materials. Values labeled with (a) or (b) refer to the reference number labeled with (a) or (b) in the same row.