Figure 2: Thermal transitions and comparative stretching studies of resilin samples.

(a) Thermal transitions of resilin samples were analysed by TM-DSC for full-length resilin (1, black line), exon I (2, blue line) and exon III (3, red line), during heating at 2 K min⁻¹. A two-step transition was indicated by TMDSC studies with step 1 in the temperature region of 30–150 °C and step 2 in 150–240 °C. The scale bar is 1 J g⁻¹ K⁻¹. (b) Comparative analysis of resilin films for exon I, exon III and full-length resilin before (left) and after (right) stretching. The scale bar is 1 cm. (c) Selected RT-FTIR spectra in the amide I and II regions were observed for exon I (1), exon III (2), full-length resilin (3), exon I ×1.5 drawn (4), exon III ×1.5 drawn (5) and full-length resilin ×1.5 drawn (6). The scale bar is 0.5.