Figure 4. Fibers under cross polarised light (A) Micro Raman spectra (B) and stress-strain plots (C) of representative recombinant honeybee silk fibers (mixture of AmelF3 and AmelF1-4 data).

Fibers were either undrawn (pale grey lines) or wet-drawn to around 100% (dark grey lines) or 300% (black lines) their original length in a 90% methanol bath.