Table 4 Peak positions and assignments of the Raman spectra for the proteins with 532 nm laser irradiation [33, 36]
Peak Position (cm−1) | Structure feature | Region/assignment |
|---|---|---|
1636 | α-helix | Amide I (C=O stretch) |
1584 | Heme | vibrations of phenylalanine, C=C stretch, G A, |
1431 | / | CH2/CH3 amino acid deformation |
1371 | Lipids | CH3 symmetric stretch |
1340 | / | C–H deformation |
1305 | α-helix | Amide III α-helix/CH deformation |
1224 | β-sheet/Protein | Amide III/Cα–N stretch, N–H deformation |
1171 | Tyr | deformation vibrations of CC group, Tyr (C–H inplane) |
1126 | Glucose | deformation vibrations of C–N group |
996 | Phe | vibrations of phenylalanine, aromatic ring breathing |
748 | Trp | tryptophan vibration |
675 | Cys | Cys (C–S stretch) |