Table 1.

Assignments of the secondary structure components to the corresponding Raman peaks and overview of the Raman shifts in cm⁻¹ of the center peak positions ${\nu }_s$ of the Voigt functions in the amide I and amide III bands of the two investigated proteins poly-L-lysine and lysozyme resulting from the spectral reconstruction with an indication of Raman shifts given in the literature (used as starting parameters).

Secondary Structure	Amide I		Amide III
	Poly-L-lysine
	This Work	Literature	This Work	Literature
α-helix	1625	1635 [50]	1278	1276 [41]
	1649	1641 [56]	1292	1305 [57]
β-sheet	1665	1665 [56]	1241	1237 [56]
random coil	1638	1641 [55]	1257	1257 [47]
	lysozyme
α-helix	1625	1634 [50]	1278	1273 [57]
	1653	1655 [55]	1295	1304 [57]
β-sheet	1667	1669 [58]	1235	1229 [47]
random coil	1635	1639 [55]	1259	1250 [47]