Table 1. Assignments of the characterized bands in PERS spectra.

	Bands (cm–1)	Component	Tentative assignments of PERS bands
1	490–510	Protein	S–S stretching
2	620–660	Protein	C–S stretching
3	820–860	DNA/protein	O–P–O backbone, tyrosine
4	1000–1020	Protein	Ring breathing of phenylalanine
5	1120–1140	Protein/carbohydrate	C–N stretching, C–O/C–C stretching
6	1200–1240	Protein	Amide III (β-pleated sheet)
7	1280–1320	Protein	Amide III (α-helix)
8	1460–1500	Lipid/protein	CH2/CH3 deformation, bending
9	1560–1600	DNA/protein	Guanine/adenine, phenylalanine