| Raman Shift (cm−1) | Attributions |
| 1243.42 | Amide III |
| 1327.23 | CH2 formation |
| 1457.23 | CH2 deformation |
| 1511.97 | Amide II |
| 1650.52 | Asymmetric deformation of NH3 |
| 1669.34 | Amide I |
| 2131.18 | Isonitrile R-N-C bond |
| 2882.10 | L-glycine |
| 2936.84 | L-alanine |
| 2955.65 | L-glutamine |
| 2974.47 | L-proline |