TABLE 2.
The assignments of band positions in Raman spectra (Dong et al., 2003; Sudworth and Krasner, 2004; Chen et al., 2009; Ramachandran et al., 2014; Xiong et al., 2014; Xiong and JiJi, 2017).
| Assignments | Band positions/cm–1 | Assignments | Band positions/cm–1 |
| Phenylalanine | 621, 1001–1004, 1031, 1171, 1208–1211, 1585, 1604–1608 | Amide III, β-sheet | 1220–1245 |
| Tyrosine | 642, 829–830, 850, 1171–1177, 1208–1211, 1608 | Amide III, disordered | 1240–1279 |
| Methionine sulfoxide | 704–710, 1010 | Amide III, α-helix | 1267–1270, 1293–1300 |
| Alanine | 763 | C-H deformation (lipid and protein) | 1298–1300, 1440–1449 |
| Skeletal C–C stretch (cholesterol) | 1064–1065 | Amide S, disordered | 1380–1393 |
| Arginine, Lysine | 1080 | Amide S, β-sheet | 1395–1406 |
| Asparagine, Glutamine | 1080, 1402 | CH2 bending (protein) | 1455–1466 |
| C-N stretch | 1080, 1124–1130, 1153 | Amide II, disordered | 1548–1561 |
| C-C stretch | 1080–1088, 1129–1130 | Amide II, β-sheet | 1550–1564 |
| PO2– symmetrical stretch | 1088 | Amide I, α-helix | 1648–1666 |
| Valine, Isoleucine | 1124, 1160 | Amide I, disordered | 1660–1682 |
| Amide I, β-sheet | 1662–1675 |