Table 1.

The relative proportion (%) of the secondary structures calculated from the areas of the fitted overlapped peaks of sericin films with different content of glycerol.

Peaks	1608	1617	1627	1638	1648	1658	1668	1679	1690
Secondary Structure	Aggregated Strands	β-Sheet		Random Coil		α-Helices	Turns
0% Gly	0.36 ± 0.05	17.19 ± 0.3		29.86 ± 2.4		15.91 ± 2.2	36.67 ± 0.1
10% Gly	1.15 ± 0.01	19.58 ± 0.2		26.99 ± 0.8		15.46 ± 1.2	36.81 ± 0.3
20% Gly	1.35 ± 0.02	18.08 ± 1.4		29.53 ± 0.7		15.16 ± 1.1	35.88 ± 1.7
30% Gly	1.25 ± 0.01	20.01 ± 2.0		33.28 ± 1.2		14.37 ± 1.3	31.09 ± 0.5