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| region | wavenumber (cm–1) | functional groups | |
|---|---|---|---|
| amide A | 3430 | νNH, νOH | |
| amide B | 3060 | νNH | |
| amide B | 2930 |
|
|
| amide I | 1650 | νC=O, νNH | |
| amide II | 1540 | νNH, νC–N, νC–C | |
| amide II | 1450 |
|
|
| amide II | 1410 |
|
|
| amide II | 1330 |
|
|
| amide III | 1235 | δC–N, δNH | |
| amide III | 1080 | νC–O |
