TABLE II.
Raman peak positions and assignments of normal cervical squamous cells.a
| Raman peaks (cm−1) | Tentative assignments33 |
|---|---|
| 535 w | Cholesterol ester |
| 570 broad | Tryptophane/cytosine, guanine |
| 621 w | C–C twist in phenylalanine (protein) |
| 644 vw | C–C twist in tyrosine |
| 761 vw | Sym. ring breathing in tryptophane |
| 780 vw | Uracil ring breathing (nucleotide) |
| 816 m | δ(CCH) aliphatic (collagen) |
| 854 s | Ring breathing in tyrosine, CCH deformation |
| 876 m (sh) | CC stretch (protein, collagen) |
| 922 m | C–C stretch (protein, collagen) |
| 938 s | C–C skeletal stretch in protein, collagen |
| 959 w (sh) | Sym. stretch phosphate |
| 1003 vs | Sym. ring breathing of phenylalanine |
| 1033 m | C–H in plane bending of phenylalanine |
| 1064 w | C–C skeletal stretch in lipids |
| 1101 m | DNA: O–P–O backbone stretch |
| 1125 w | C–C skeletal stretch in lipids |
| 1176 w | Cytosine/guanine/adenine |
| 1208 w | CC stretch backbone phenyl ring |
| 1247 s | Amide III: β-sheet |
| 1273 w | δ(=CH), amide III |
| 1321 s | CH2 deformation in lipids/adenine/cytosine, amide III (α-helix) |
| 1342 s | Polynucleotide chain (DNA/RNA) |
| 1425 sh | δ(CH3) |
| 1450 vs | CH2 deformation in lipids |
| 1551 w | Tryptophane |
| 1606 w | C=C phenylalanine |
| 1665 vs | Amide I: α helix |
| 2878 s | CH2 sym. Stretch |
| 2900 m | CH stretch |
| 2938 vs | CH2 asym. and CH3 sym. stretch, CH3 sym. (lipid) |
| 2975 m | CH3 asym. Stretch |
| 2981 m | CH3 asym. Stretch |
a
Abbreviations: m = medium; s = strong; sh = shoulder; v = very; w = weak; δ = deformation; ρ = rocking modes; sym. = symmetric; asym. = antisymmetric.