Table 2.
An assignment of the major bands of Fourier transform infrared (FTIR) spectra depicted in Figure 2 [14,22,23,24,25].
| Vibration Modes | Position [cm−1] | Assignment |
|---|---|---|
| ν(C=O), amide I: β-turns, β-sheets | 1684, 1680 | Proteins |
| ν(C=O), amide I: α-helices | 1655, 1652 | Proteins |
| ν(C=O); amide I, parallel β-sheets | 1631, 1628 | Proteins |
| δ(NH); amide II of proteins | 1547 | Proteins |
| in-plane δ(CH) of phenyl ring | 1516 | Tyrosine residues |
| ν(C-N)/δ(N-H)/ν(CH3-C): amide III | 1310, 1312 | Proteins |
| amide III | 1286–1202 | Fibrous proteins |
| ν(C-OH) | 1166 | Hydroxyproline residues |
| ν(C-O), δ(C-O-H), δ(C-O-C) | 1116, 1081, 1038 | Collagen-associated carbohydrate moieties |