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. 2016 Nov 7;6:36473. doi: 10.1038/srep36473

Table 2. Comparison of mechanical properties among recombinant and natural spider silk fibres.

Protein origin Molecular weight (kDa) Solvent/coagulation bath* Breaking Strain (%) Breaking Stress (MPa) Modulus (GPa) Toughness (MJ/m3) No. of samples
MaSp1 47 (WS-3x) Water/ethanol 3.5 ± 1.2 62.3 ± 17.2 4.0 ± 2.8 1.6 ± 0.9 5
MaSp1 47 (WS-PSD-3x) Water/ethanol 18.3 ± 12.8 286.2 ± 137.7 8.4 ± 4.3 37.7 ± 28.8 5
TuSp1 and MiSp1 378 HFIP/water 10 308 ± 57 9.3 ± 3 514
MaSp1 284 HFIP/methanol 15 ± 5 508 ± 108 21 ± 4 1012
ADF3 268 GdmSCN/75% IPA 110 ± 25 370 ± 59 4 ± 1 189 ± 33 1015
MaSp1 and MaSp2 65 HFIP & formic acid/IPA 56 ± 7 221.7 ± 11.0 6 ± 0.5 102.5 ± 13.6 1032
MaSp2 86.5 HFIP/IPA 181.3 ± 103.5 39.0 ± 7.4 1.6 ± 0.4 59.3 ± 37.2 2042
Flag and MaSp 2 58 HFIP/IPA 18.7 ± 17.9 101.7 ± 32.8 3.3 ± 1.4 18.8 ± 20.7 1119
MaSp1 and MaSp2 250–320 water 24 ± 8 1183 ± 334 8 ± 2 167 ± 65 Natural dragline silk15

*HFIP: hexafluoroisopropanol; GdmSCN: guanidinium thiocyanate; IPA: isopropyl alcohol.