TABLE 2.

Band parameters of the amide I components of the orientation-insensitive spectra for four silk fibers

	Component	1	2	3	4	5
	Assignment	Unordered	31-helix	β-sheet	β-turn	β-turn
N. clavipes	Position/cm−1	1641	1656	1670	1685	1700
	FWHH/cm−1	22	17	16	20	20
	%L	47	7	8	20	55
N. edulis	Position/cm−1	1639	1656	1669	1684	1698
	FWHH/cm−1	22	19	16	18	20
	%L	8	19	14	25	38
S. c. ricini	Position/cm−1	1643	1657	1669	1682	1697
	FWHH/cm−1	22	14	13	19	20
	%L	15	48	41	28	29
B. mori	Position/cm−1	1639	1655	1666	1678	1693
	FWHH/cm−1	22	17	16	18	20
	%L	43	4	42	25	0