Table 1.
Comparative stiffness and mechanical stability of various proteinaceous filaments*
| Protein | Young's modulus (MPa) | Fracture strain (%) |
|---|---|---|
| Fibrin fiber, uncrosslinked | 1.7±1.3** | 226 |
| Fibrin fiber, crosslinked | 14.5±3.5** | 332 |
| Elastin | 1 | 150 |
| Myofibrils | 1 | 200 |
| Resilin | 1-2 | 190, 313 |
| Fibronectin# | 0.1-3.5 | 700 |
| Spider silk (Araneus Flag) | 3 | 270 |
| Fibrillin | 0.2-100 | >185 |
| Intermediate filament | 6-300 | 160-220 |
| Mussel byssus | 10-500 | 109 |
| Collagen, tendon | 160-7,500 | 12 |
| Microtubules | 1,000-1,500 | ≤ 20 |
| α-Keratin wet | 2,000 | 45 |
| Actin | 1,800-2,500 | ≤ 15 |
| Collagen, crosslinked | 5,000-7,000 | 12-16 |
| Spider silk (Araneus Ma) | 10,000 | 27 |